Below is the database class for using in your PHP project
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 |
<?php /************************************************* ********** Configuration variables ************** *************************************************/ /** ** Turn on debug mode ** This will display all the PHP errors and warnings **/ define('WP_DEBUG', true); /** The name of the database for WordPress */ define('DB_NAME', 'wp9-1'); /** MySQL database username */ define('DB_USER', 'root'); /** MySQL database password */ define('DB_PASSWORD', ''); /** MySQL hostname */ define('DB_HOST', 'localhost'); /** Database Charset to use in creating database tables. */ define('DB_CHARSET', 'utf8'); /** The Database Collate type. Don't change this if in doubt. */ define('DB_COLLATE', ''); /** ** Whether to use mysql or mysqli ** If left commented the script will automatically decide ** based upon the version of PHP */ //define('WP_USE_EXT_MYSQL', false); /************************************************* ========= Configuration variables Ends ========== *************************************************/ define( 'OBJECT', 'OBJECT'); define( 'object', 'OBJECT' ); // Back compat. define( 'OBJECT_K', 'OBJECT_K' ); define( 'ARRAY_A', 'ARRAY_A' ); define( 'ARRAY_N', 'ARRAY_N' ); /** ** For debugging this library prints some error messages on screen which can ** be turn OFF by following variable ** will work only if WP_DEBUG is true **/ define('WP_DEBUG_DISPLAY', true); /** * Database Access Abstraction Object */ class wpdb { /** * Whether to show SQL/DB errors */ var $show_errors = false; /** * Whether to suppress errors during the DB bootstrapping. */ var $suppress_errors = false; /** * The last error during query. */ var $last_error = ''; /** * Amount of queries made */ var $num_queries = 0; /** * Count of rows returned by previous query */ var $num_rows = 0; /** * Count of affected rows by previous query */ var $rows_affected = 0; /** * The ID generated for an AUTO_INCREMENT column by the previous query (usually INSERT). */ var $insert_id = 0; /** * Last query made */ var $last_query; /** * Results of the last query made */ var $last_result; /** * MySQL result, which is either a resource or boolean. */ protected $result; /** * Saved info on the table column */ protected $col_info; /** * Saved queries that were executed */ var $queries; /** * The number of times to retry reconnecting before dying. */ protected $reconnect_retries = 5; /** * Whether the database queries are ready to start executing. */ var $ready = false; /** * Format specifiers for DB columns. Columns not listed here default to %s. Initialized during WP load. * * Keys are column names, values are format types: 'ID' => '%d' * */ var $field_types = array(); /** * Database table columns charset */ var $charset; /** * Database table columns collate */ var $collate; /** * Database Username */ protected $dbuser; /** * Database Password */ protected $dbpassword; /** * Database Name */ protected $dbname; /** * Database Host */ protected $dbhost; /** * Database Handle */ protected $dbh; /** * A textual description of the last query/get_row/get_var call */ var $func_call; /** * Whether MySQL is used as the database engine. * * Set in WPDB::db_connect() to true, by default. */ public $is_mysql = null; /** * A list of incompatible SQL modes. */ protected $incompatible_modes = array( 'NO_ZERO_DATE', 'ONLY_FULL_GROUP_BY', 'STRICT_TRANS_TABLES', 'STRICT_ALL_TABLES', 'TRADITIONAL' ); /** * Whether to use mysqli over mysql. */ private $use_mysqli = false; /** * Whether we've managed to successfully connect at some point */ private $has_connected = false; /** * Connects to the database server and selects a database * * PHP5 style constructor for compatibility with PHP5. Does * the actual setting up of the class properties and connection * to the database. * * @param string $dbuser MySQL database user * @param string $dbpassword MySQL database password * @param string $dbname MySQL database name * @param string $dbhost MySQL database host */ function __construct( $dbuser = DB_USER, $dbpassword = DB_PASSWORD, $dbname = DB_NAME, $dbhost = DB_HOST ) { if( empty($dbuser) || empty($dbname) || empty($dbhost) ) $this->bail( "Please set the database details in wp-db.php" ); register_shutdown_function( array( $this, '__destruct' ) ); if ( WP_DEBUG && WP_DEBUG_DISPLAY ) $this->show_errors(); /* Use ext/mysqli if it exists and: * - WP_USE_EXT_MYSQL is defined as false, or * - We are a development version of WordPress, or * - We are running PHP 5.5 or greater, or * - ext/mysql is not loaded. */ if ( function_exists( 'mysqli_connect' ) ) { if ( defined( 'WP_USE_EXT_MYSQL' ) ) { $this->use_mysqli = ! WP_USE_EXT_MYSQL; } elseif ( version_compare( phpversion(), '5.5', '>=' ) || ! function_exists( 'mysql_connect' ) ) { $this->use_mysqli = true; } } $this->init_charset(); $this->dbuser = $dbuser; $this->dbpassword = $dbpassword; $this->dbname = $dbname; $this->dbhost = $dbhost; $this->db_connect(); } /** * PHP5 style destructor and will run when database object is destroyed. * @return bool true */ function __destruct() { return true; } /** * PHP5 style magic getter, used to lazy-load expensive data. * @param string $name The private member to get, and optionally process * @return mixed The private member */ function __get( $name ) { if ( 'col_info' == $name ) $this->load_col_info(); return $this->$name; } /** * Magic function, for backwards compatibility * @param string $name The private member to set * @param mixed $value The value to set */ function __set( $name, $value ) { $this->$name = $value; } /** * Magic function, for backwards compatibility * @param string $name The private member to check * * @return bool If the member is set or not */ function __isset( $name ) { return isset( $this->$name ); } /** * Magic function, for backwards compatibility * @param string $name The private member to unset */ function __unset( $name ) { unset( $this->$name ); } /** * Set $this->charset and $this->collate */ function init_charset() { if ( defined( 'DB_COLLATE' ) ) $this->collate = DB_COLLATE; if ( defined( 'DB_CHARSET' ) ) $this->charset = DB_CHARSET; } /** * Sets the connection's character set. * @param resource $dbh The resource given by mysql_connect * @param string $charset The character set (optional) * @param string $collate The collation (optional) */ function set_charset( $dbh, $charset = null, $collate = null ) { if ( ! isset( $charset ) ) $charset = $this->charset; if ( ! isset( $collate ) ) $collate = $this->collate; if ( $this->has_cap( 'collation' ) && ! empty( $charset ) ) { if ( $this->use_mysqli ) { if ( function_exists( 'mysqli_set_charset' ) && $this->has_cap( 'set_charset' ) ) { mysqli_set_charset( $dbh, $charset ); } else { $query = $this->prepare( 'SET NAMES %s', $charset ); if ( ! empty( $collate ) ) $query .= $this->prepare( ' COLLATE %s', $collate ); mysqli_query( $query, $dbh ); } } else { if ( function_exists( 'mysql_set_charset' ) && $this->has_cap( 'set_charset' ) ) { mysql_set_charset( $charset, $dbh ); } else { $query = $this->prepare( 'SET NAMES %s', $charset ); if ( ! empty( $collate ) ) $query .= $this->prepare( ' COLLATE %s', $collate ); mysql_query( $query, $dbh ); } } } } /** * Change the current SQL mode, and ensure its WordPress compatibility. * * If no modes are passed, it will ensure the current MySQL server * modes are compatible. * * @since 3.9.0 * * @param array $modes Optional. A list of SQL modes to set. */ function set_sql_mode( $modes = array() ) { if ( empty( $modes ) ) { if ( $this->use_mysqli ) { $res = mysqli_query( $this->dbh, 'SELECT @@SESSION.sql_mode' ); } else { $res = mysql_query( 'SELECT @@SESSION.sql_mode', $this->dbh ); } if ( empty( $res ) ) { return; } if ( $this->use_mysqli ) { $modes_array = mysqli_fetch_array( $res ); if ( empty( $modes_array[0] ) ) { return; } $modes_str = $modes_array[0]; } else { $modes_str = mysql_result( $res, 0 ); } if ( empty( $modes_str ) ) { return; } $modes = explode( ',', $modes_str ); } $modes = array_change_key_case( $modes, CASE_UPPER ); /** * Filter the list of incompatible SQL modes to exclude. */ $incompatible_modes = $this->incompatible_modes; foreach( $modes as $i => $mode ) { if ( in_array( $mode, $incompatible_modes ) ) { unset( $modes[ $i ] ); } } $modes_str = implode( ',', $modes ); if ( $this->use_mysqli ) { mysqli_query( $this->dbh, "SET SESSION sql_mode='$modes_str'" ); } else { mysql_query( "SET SESSION sql_mode='$modes_str'", $this->dbh ); } } /** * Selects a database using the current database connection. * * The database name will be changed based on the current database * connection. On failure, the execution will bail and display an DB error. * @param string $db MySQL database name * @param resource $dbh Optional link identifier. * @return null Always null. */ function select( $db, $dbh = null ) { if ( is_null($dbh) ) $dbh = $this->dbh; if ( $this->use_mysqli ) { $success = @mysqli_select_db( $dbh, $db ); } else { $success = @mysql_select_db( $db, $dbh ); } if ( ! $success ) { $this->ready = false; $this->bail( "Unable to connect to database" ); return; } } /** * Real escape, using mysql_real_escape_string() * @param string $string to escape * @return string escaped */ function _real_escape( $string ) { if ( $this->dbh ) { if ( $this->use_mysqli ) { return mysqli_real_escape_string( $this->dbh, $string ); } else { return mysql_real_escape_string( $string, $this->dbh ); } } $class = get_class( $this ); $this->bail("$class must set a database connection for use with escaping."); return; } /** * Escape data. Works on arrays. * @param string|array $data * @return string|array escaped */ function _escape( $data ) { if ( is_array( $data ) ) { foreach ( $data as $k => $v ) { if ( is_array($v) ) $data[$k] = $this->_escape( $v ); else $data[$k] = $this->_real_escape( $v ); } } else { $data = $this->_real_escape( $data ); } return $data; } /** * Escapes content by reference for insertion into the database, for security * @param string $string to escape * @return void */ function escape_by_ref( &$string ) { if ( ! is_float( $string ) ) $string = $this->_real_escape( $string ); } /** * Prepares a SQL query for safe execution. Uses sprintf()-like syntax. * * The following directives can be used in the query format string: * %d (integer) * %f (float) * %s (string) * %% (literal percentage sign - no argument needed) * * All of %d, %f, and %s are to be left unquoted in the query string and they need an argument passed for them. * Literals (%) as parts of the query must be properly written as %%. * * This function only supports a small subset of the sprintf syntax; it only supports %d (integer), %f (float), and %s (string). * Does not support sign, padding, alignment, width or precision specifiers. * Does not support argument numbering/swapping. * * May be called like {@link http://php.net/sprintf sprintf()} or like {@link http://php.net/vsprintf vsprintf()}. * * Both %d and %s should be left unquoted in the query string. * * <code> * wpdb::prepare( "SELECT * FROM `table` WHERE `column` = %s AND `field` = %d", 'foo', 1337 ) * wpdb::prepare( "SELECT DATE_FORMAT(`field`, '%%c') FROM `table` WHERE `column` = %s", 'foo' ); * * * @link http://php.net/sprintf Description of syntax. * * @param string $query Query statement with sprintf()-like placeholders * @param array|mixed $args The array of variables to substitute into the query's placeholders if being called like * {@link http://php.net/vsprintf vsprintf()}, or the first variable to substitute into the query's placeholders if * being called like {@link http://php.net/sprintf sprintf()}. * @param mixed $args,... further variables to substitute into the query's placeholders if being called like * {@link http://php.net/sprintf sprintf()}. * @return null|false|string Sanitized query string, null if there is no query, false if there is an error and string * if there was something to prepare */ function prepare( $query, $args ) { if ( is_null( $query ) ) return; // This is not meant to be foolproof -- but it will catch obviously incorrect usage. if ( strpos( $query, '%' ) === false ) { $this->bail( 'The query argument of prepare must have a placeholder.' ); } $args = func_get_args(); array_shift( $args ); // If args were passed as an array (as in vsprintf), move them up if ( isset( $args[0] ) && is_array($args[0]) ) $args = $args[0]; $query = str_replace( "'%s'", '%s', $query ); // in case someone mistakenly already singlequoted it $query = str_replace( '"%s"', '%s', $query ); // doublequote unquoting $query = preg_replace( '|(?<!%)%f|' , '%F', $query ); // Force floats to be locale unaware $query = preg_replace( '|(?<!%)%s|', "'%s'", $query ); // quote the strings, avoiding escaped strings like %%s array_walk( $args, array( $this, 'escape_by_ref' ) ); return @vsprintf( $query, $args ); } /** * Print SQL/DB error. * * @since 0.71 * @global array $EZSQL_ERROR Stores error information of query and error string * * @param string $str The error to display * @return bool False if the showing of errors is disabled. */ function print_error( $str = '' ) { global $EZSQL_ERROR; if ( !$str ) { if ( $this->use_mysqli ) { $str = mysqli_error( $this->dbh ); } else { $str = mysql_error( $this->dbh ); } } $EZSQL_ERROR[] = array( 'query' => $this->last_query, 'error_str' => $str ); if ( $this->suppress_errors ) return false; if ( $caller = $this->get_caller() ) $error_str = sprintf( 'WordPress database error %1$s for query %2$s made by %3$s', $str, $this->last_query, $caller ); else $error_str = sprintf( 'WordPress database error %1$s for query %2$s', $str, $this->last_query ); error_log( $error_str ); // Are we showing errors? if ( ! $this->show_errors ) return false; $str = htmlspecialchars( $str, ENT_QUOTES ); $query = htmlspecialchars( $this->last_query, ENT_QUOTES ); print "<div id='error'> <p class='wpdberror'><strong>WordPress database error:</strong> [$str]<br /> $query</code></p> </div>"; } /** * Enables showing of database errors. * * This function should be used only to enable showing of errors. * wpdb::hide_errors() should be used instead for hiding of errors. However, * this function can be used to enable and disable showing of database * errors. * * @param bool $show Whether to show or hide errors * @return bool Old value for showing errors. */ function show_errors( $show = true ) { $errors = $this->show_errors; $this->show_errors = $show; return $errors; } /** * Disables showing of database errors. * * By default database errors are not shown. * @return bool Whether showing of errors was active */ function hide_errors() { $show = $this->show_errors; $this->show_errors = false; return $show; } /** * Whether to suppress database errors. * * By default database errors are suppressed, with a simple * call to this function they can be enabled. * @param bool $suppress Optional. New value. Defaults to true. * @return bool Old value */ function suppress_errors( $suppress = true ) { $errors = $this->suppress_errors; $this->suppress_errors = (bool) $suppress; return $errors; } /** * Kill cached query results. * @return void */ function flush() { $this->last_result = array(); $this->col_info = null; $this->last_query = null; $this->rows_affected = $this->num_rows = 0; $this->last_error = ''; if ( is_resource( $this->result ) ) { if ( $this->use_mysqli ) { mysqli_free_result( $this->result ); } else { mysql_free_result( $this->result ); } } } /** * Connect to and select database */ function db_connect( $allow_bail = true ) { $this->is_mysql = true; $new_link = defined( 'MYSQL_NEW_LINK' ) ? MYSQL_NEW_LINK : true; $client_flags = defined( 'MYSQL_CLIENT_FLAGS' ) ? MYSQL_CLIENT_FLAGS : 0; if ( $this->use_mysqli ) { $this->dbh = mysqli_init(); // mysqli_real_connect doesn't support the host param including a port or socket // like mysql_connect does. This duplicates how mysql_connect detects a port and/or socket file. $port = null; $socket = null; $host = $this->dbhost; $port_or_socket = strstr( $host, ':' ); if ( ! empty( $port_or_socket ) ) { $host = substr( $host, 0, strpos( $host, ':' ) ); $port_or_socket = substr( $port_or_socket, 1 ); if ( 0 !== strpos( $port_or_socket, '/' ) ) { $port = intval( $port_or_socket ); $maybe_socket = strstr( $port_or_socket, ':' ); if ( ! empty( $maybe_socket ) ) { $socket = substr( $maybe_socket, 1 ); } } else { $socket = $port_or_socket; } } if ( WP_DEBUG ) { mysqli_real_connect( $this->dbh, $host, $this->dbuser, $this->dbpassword, null, $port, $socket, $client_flags ); } else { @mysqli_real_connect( $this->dbh, $host, $this->dbuser, $this->dbpassword, null, $port, $socket, $client_flags ); } if ( $this->dbh->connect_errno ) { $this->dbh = null; /* It's possible ext/mysqli is misconfigured. Fall back to ext/mysql if: * - We haven't previously connected, and * - WP_USE_EXT_MYSQL isn't set to false, and * - ext/mysql is loaded. */ $attempt_fallback = true; if ( $this->has_connected ) { $attempt_fallback = false; } else if ( defined( 'WP_USE_EXT_MYSQL' ) && ! WP_USE_EXT_MYSQL ) { $attempt_fallback = false; } else if ( ! function_exists( 'mysql_connect' ) ) { $attempt_fallback = false; } if ( $attempt_fallback ) { $this->use_mysqli = false; $this->db_connect(); } } } else { if ( WP_DEBUG ) { $this->dbh = mysql_connect( $this->dbhost, $this->dbuser, $this->dbpassword, $new_link, $client_flags ); } else { $this->dbh = @mysql_connect( $this->dbhost, $this->dbuser, $this->dbpassword, $new_link, $client_flags ); } } if ( ! $this->dbh && $allow_bail ) { $this->bail( " <h1>Error establishing a database connection</h1> <p>This either means that the username and password information is incorrect or we can't contact the database server. This could mean your host's database server is down.</p> <ul> <li>Are you sure you have the correct username and password?</li> <li>Are you sure that you have typed the correct hostname?</li> <li>Are you sure that the database server is running?</li> </ul>" ); return false; } else if ( $this->dbh ) { $this->has_connected = true; $this->set_charset( $this->dbh ); $this->set_sql_mode(); $this->ready = true; $this->select( $this->dbname, $this->dbh ); return true; } return false; } /** * Check that the connection to the database is still up. If not, try to reconnect. * * If this function is unable to reconnect, it will forcibly die * * If $allow_bail is false, the lack of database connection will need * to be handled manually. */ function check_connection( $allow_bail = true ) { if ( $this->use_mysqli ) { if ( @mysqli_ping( $this->dbh ) ) { return true; } } else { if ( @mysql_ping( $this->dbh ) ) { return true; } } $error_reporting = false; // Disable warnings, as we don't want to see a multitude of "unable to connect" messages if ( WP_DEBUG ) { $error_reporting = error_reporting(); error_reporting( $error_reporting & ~E_WARNING ); } for ( $tries = 1; $tries <= $this->reconnect_retries; $tries++ ) { // On the last try, re-enable warnings. We want to see a single instance of the // "unable to connect" message on the bail() screen, if it appears. if ( $this->reconnect_retries === $tries && WP_DEBUG ) { error_reporting( $error_reporting ); } if ( $this->db_connect( false ) ) { if ( $error_reporting ) { error_reporting( $error_reporting ); } return true; } sleep( 1 ); } if ( ! $allow_bail ) { return false; } // We weren't able to reconnect, so we better bail. $this->bail( " <h1>Error reconnecting to the database</h1> <p>This means that we lost contact with the database server. This could mean your host's database server is down.</p> <ul> <li>Are you sure that the database server is running?</li> <li>Are you sure that the database server is not under particularly heavy load?</li> </ul>" ); // Call die() if bail didn't die, because this database is no more. It has ceased to be (at least temporarily). die(); } /** * Perform a MySQL database query, using current database connection. * @param string $query Database query * @return int|false Number of rows affected/selected or false on error */ function query( $query ) { if ( ! $this->ready ) return false; $return_val = 0; $this->flush(); // Log how the function was called $this->func_call = "\$db->query(\"$query\")"; // Keep track of the last query for debug.. $this->last_query = $query; $this->_do_query( $query ); // MySQL server has gone away, try to reconnect $mysql_errno = 0; if ( ! empty( $this->dbh ) ) { if ( $this->use_mysqli ) { $mysql_errno = mysqli_errno( $this->dbh ); } else { $mysql_errno = mysql_errno( $this->dbh ); } } if ( empty( $this->dbh ) || 2006 == $mysql_errno ) { if ( $this->check_connection() ) { $this->_do_query( $query ); } else { $this->insert_id = 0; return false; } } // If there is an error then take note of it.. if ( $this->use_mysqli ) { $this->last_error = mysqli_error( $this->dbh ); } else { $this->last_error = mysql_error( $this->dbh ); } if ( $this->last_error ) { // Clear insert_id on a subsequent failed insert. if ( $this->insert_id && preg_match( '/^\s*(insert|replace)\s/i', $query ) ) $this->insert_id = 0; $this->print_error(); return false; } if ( preg_match( '/^\s*(create|alter|truncate|drop)\s/i', $query ) ) { $return_val = $this->result; } elseif ( preg_match( '/^\s*(insert|delete|update|replace)\s/i', $query ) ) { if ( $this->use_mysqli ) { $this->rows_affected = mysqli_affected_rows( $this->dbh ); } else { $this->rows_affected = mysql_affected_rows( $this->dbh ); } // Take note of the insert_id if ( preg_match( '/^\s*(insert|replace)\s/i', $query ) ) { if ( $this->use_mysqli ) { $this->insert_id = mysqli_insert_id( $this->dbh ); } else { $this->insert_id = mysql_insert_id( $this->dbh ); } } // Return number of rows affected $return_val = $this->rows_affected; } else { $num_rows = 0; if ( $this->use_mysqli ) { while ( $row = @mysqli_fetch_object( $this->result ) ) { $this->last_result[$num_rows] = $row; $num_rows++; } } else { while ( $row = @mysql_fetch_object( $this->result ) ) { $this->last_result[$num_rows] = $row; $num_rows++; } } // Log number of rows the query returned // and return number of rows selected $this->num_rows = $num_rows; $return_val = $num_rows; } return $return_val; } /** * Internal function to perform the mysql_query() call. * @param string $query The query to run. */ private function _do_query( $query ) { if ( defined( 'SAVEQUERIES' ) && SAVEQUERIES ) { $this->timer_start(); } if ( $this->use_mysqli ) { $this->result = @mysqli_query( $this->dbh, $query ); } else { $this->result = @mysql_query( $query, $this->dbh ); } $this->num_queries++; if ( defined( 'SAVEQUERIES' ) && SAVEQUERIES ) { $this->queries[] = array( $query, $this->timer_stop(), $this->get_caller() ); } } /** * Insert a row into a table. * * <code> * wpdb::insert( 'table', array( 'column' => 'foo', 'field' => 'bar' ) ) * wpdb::insert( 'table', array( 'column' => 'foo', 'field' => 1337 ), array( '%s', '%d' ) ) * * * @param string $table table name * @param array $data Data to insert (in column => value pairs). Both $data columns and $data values should be "raw" (neither should be SQL escaped). * @param array|string $format Optional. An array of formats to be mapped to each of the value in $data. If string, that format will be used for all of the values in $data. * A format is one of '%d', '%f', '%s' (integer, float, string). If omitted, all values in $data will be treated as strings unless otherwise specified in wpdb::$field_types. * @return int|false The number of rows inserted, or false on error. */ function insert( $table, $data, $format = null ) { return $this->_insert_replace_helper( $table, $data, $format, 'INSERT' ); } /** * Replace a row into a table. * * <code> * wpdb::replace( 'table', array( 'column' => 'foo', 'field' => 'bar' ) ) * wpdb::replace( 'table', array( 'column' => 'foo', 'field' => 1337 ), array( '%s', '%d' ) ) * * * @param string $table table name * @param array $data Data to insert (in column => value pairs). Both $data columns and $data values should be "raw" (neither should be SQL escaped). * @param array|string $format Optional. An array of formats to be mapped to each of the value in $data. If string, that format will be used for all of the values in $data. * A format is one of '%d', '%f', '%s' (integer, float, string). If omitted, all values in $data will be treated as strings unless otherwise specified in wpdb::$field_types. * @return int|false The number of rows affected, or false on error. */ function replace( $table, $data, $format = null ) { return $this->_insert_replace_helper( $table, $data, $format, 'REPLACE' ); } /** * Helper function for insert and replace. * * Runs an insert or replace query based on $type argument. * * @param string $table table name * @param array $data Data to insert (in column => value pairs). Both $data columns and $data values should be "raw" (neither should be SQL escaped). * @param array|string $format Optional. An array of formats to be mapped to each of the value in $data. If string, that format will be used for all of the values in $data. * A format is one of '%d', '%f', '%s' (integer, float, string). If omitted, all values in $data will be treated as strings unless otherwise specified in wpdb::$field_types. * @param string $type Optional. What type of operation is this? INSERT or REPLACE. Defaults to INSERT. * @return int|false The number of rows affected, or false on error. */ function _insert_replace_helper( $table, $data, $format = null, $type = 'INSERT' ) { if ( ! in_array( strtoupper( $type ), array( 'REPLACE', 'INSERT' ) ) ) return false; $this->insert_id = 0; $formats = $format = (array) $format; $fields = array_keys( $data ); $formatted_fields = array(); foreach ( $fields as $field ) { if ( !empty( $format ) ) $form = ( $form = array_shift( $formats ) ) ? $form : $format[0]; elseif ( isset( $this->field_types[$field] ) ) $form = $this->field_types[$field]; else $form = '%s'; $formatted_fields[] = $form; } $sql = "{$type} INTO `$table` (`" . implode( '`,`', $fields ) . "`) VALUES (" . implode( ",", $formatted_fields ) . ")"; return $this->query( $this->prepare( $sql, $data ) ); } /** * Update a row in the table * * <code> * wpdb::update( 'table', array( 'column' => 'foo', 'field' => 'bar' ), array( 'ID' => 1 ) ) * wpdb::update( 'table', array( 'column' => 'foo', 'field' => 1337 ), array( 'ID' => 1 ), array( '%s', '%d' ), array( '%d' ) ) * * * @param string $table table name * @param array $data Data to update (in column => value pairs). Both $data columns and $data values should be "raw" (neither should be SQL escaped). * @param array $where A named array of WHERE clauses (in column => value pairs). Multiple clauses will be joined with ANDs. Both $where columns and $where values should be "raw". * @param array|string $format Optional. An array of formats to be mapped to each of the values in $data. If string, that format will be used for all of the values in $data. * A format is one of '%d', '%f', '%s' (integer, float, string). If omitted, all values in $data will be treated as strings unless otherwise specified in wpdb::$field_types. * @param array|string $where_format Optional. An array of formats to be mapped to each of the values in $where. If string, that format will be used for all of the items in $where. A format is one of '%d', '%f', '%s' (integer, float, string). If omitted, all values in $where will be treated as strings. * @return int|false The number of rows updated, or false on error. */ function update( $table, $data, $where, $format = null, $where_format = null ) { if ( ! is_array( $data ) || ! is_array( $where ) ) return false; $formats = $format = (array) $format; $bits = $wheres = array(); foreach ( (array) array_keys( $data ) as $field ) { if ( !empty( $format ) ) $form = ( $form = array_shift( $formats ) ) ? $form : $format[0]; elseif ( isset($this->field_types[$field]) ) $form = $this->field_types[$field]; else $form = '%s'; $bits[] = "`$field` = {$form}"; } $where_formats = $where_format = (array) $where_format; foreach ( (array) array_keys( $where ) as $field ) { if ( !empty( $where_format ) ) $form = ( $form = array_shift( $where_formats ) ) ? $form : $where_format[0]; elseif ( isset( $this->field_types[$field] ) ) $form = $this->field_types[$field]; else $form = '%s'; $wheres[] = "`$field` = {$form}"; } $sql = "UPDATE `$table` SET " . implode( ', ', $bits ) . ' WHERE ' . implode( ' AND ', $wheres ); return $this->query( $this->prepare( $sql, array_merge( array_values( $data ), array_values( $where ) ) ) ); } /** * Delete a row in the table * * <code> * wpdb::delete( 'table', array( 'ID' => 1 ) ) * wpdb::delete( 'table', array( 'ID' => 1 ), array( '%d' ) ) * * * @param string $table table name * @param array $where A named array of WHERE clauses (in column => value pairs). Multiple clauses will be joined with ANDs. Both $where columns and $where values should be "raw". * @param array|string $where_format Optional. An array of formats to be mapped to each of the values in $where. If string, that format will be used for all of the items in $where. A format is one of '%d', '%f', '%s' (integer, float, string). If omitted, all values in $where will be treated as strings unless otherwise specified in wpdb::$field_types. * @return int|false The number of rows updated, or false on error. */ function delete( $table, $where, $where_format = null ) { if ( ! is_array( $where ) ) return false; $bits = $wheres = array(); $where_formats = $where_format = (array) $where_format; foreach ( array_keys( $where ) as $field ) { if ( !empty( $where_format ) ) { $form = ( $form = array_shift( $where_formats ) ) ? $form : $where_format[0]; } elseif ( isset( $this->field_types[ $field ] ) ) { $form = $this->field_types[ $field ]; } else { $form = '%s'; } $wheres[] = "$field = $form"; } $sql = "DELETE FROM $table WHERE " . implode( ' AND ', $wheres ); return $this->query( $this->prepare( $sql, $where ) ); } /** * Retrieve one variable from the database. * * Executes a SQL query and returns the value from the SQL result. * If the SQL result contains more than one column and/or more than one row, this function returns the value in the column and row specified. * If $query is null, this function returns the value in the specified column and row from the previous SQL result. * * @param string|null $query Optional. SQL query. Defaults to null, use the result from the previous query. * @param int $x Optional. Column of value to return. Indexed from 0. * @param int $y Optional. Row of value to return. Indexed from 0. * @return string|null Database query result (as string), or null on failure */ function get_var( $query = null, $x = 0, $y = 0 ) { $this->func_call = "\$db->get_var(\"$query\", $x, $y)"; if ( $query ) $this->query( $query ); // Extract var out of cached results based x,y vals if ( !empty( $this->last_result[$y] ) ) { $values = array_values( get_object_vars( $this->last_result[$y] ) ); } // If there is a value return it else return null return ( isset( $values[$x] ) && $values[$x] !== '' ) ? $values[$x] : null; } /** * Retrieve one row from the database. * * Executes a SQL query and returns the row from the SQL result. * * @param string|null $query SQL query. * @param string $output Optional. one of ARRAY_A | ARRAY_N | OBJECT constants. Return an associative array (column => value, ...), * a numerically indexed array (0 => value, ...) or an object ( ->column = value ), respectively. * @param int $y Optional. Row to return. Indexed from 0. * @return mixed Database query result in format specified by $output or null on failure */ function get_row( $query = null, $output = OBJECT, $y = 0 ) { $this->func_call = "\$db->get_row(\"$query\",$output,$y)"; if ( $query ) $this->query( $query ); else return null; if ( !isset( $this->last_result[$y] ) ) return null; if ( $output == OBJECT ) { return $this->last_result[$y] ? $this->last_result[$y] : null; } elseif ( $output == ARRAY_A ) { return $this->last_result[$y] ? get_object_vars( $this->last_result[$y] ) : null; } elseif ( $output == ARRAY_N ) { return $this->last_result[$y] ? array_values( get_object_vars( $this->last_result[$y] ) ) : null; } elseif ( strtoupper( $output ) === OBJECT ) { // Back compat for OBJECT being previously case insensitive. return $this->last_result[$y] ? $this->last_result[$y] : null; } else { $this->print_error( " \$db->get_row(string query, output type, int offset) -- Output type must be one of: OBJECT, ARRAY_A, ARRAY_N" ); } } /** * Retrieve one column from the database. * * Executes a SQL query and returns the column from the SQL result. * If the SQL result contains more than one column, this function returns the column specified. * If $query is null, this function returns the specified column from the previous SQL result. * * @param string|null $query Optional. SQL query. Defaults to previous query. * @param int $x Optional. Column to return. Indexed from 0. * @return array Database query result. Array indexed from 0 by SQL result row number. */ function get_col( $query = null , $x = 0 ) { if ( $query ) $this->query( $query ); $new_array = array(); // Extract the column values for ( $i = 0, $j = count( $this->last_result ); $i < $j; $i++ ) { $new_array[$i] = $this->get_var( null, $x, $i ); } return $new_array; } /** * Retrieve an entire SQL result set from the database (i.e., many rows) * * Executes a SQL query and returns the entire SQL result. * * @param string $query SQL query. * @param string $output Optional. Any of ARRAY_A | ARRAY_N | OBJECT | OBJECT_K constants. With one of the first three, return an array of rows indexed from 0 by SQL result row number. * Each row is an associative array (column => value, ...), a numerically indexed array (0 => value, ...), or an object. ( ->column = value ), respectively. * With OBJECT_K, return an associative array of row objects keyed by the value of each row's first column's value. Duplicate keys are discarded. * @return mixed Database query results */ function get_results( $query = null, $output = OBJECT ) { $this->func_call = "\$db->get_results(\"$query\", $output)"; if ( $query ) $this->query( $query ); else return null; $new_array = array(); if ( $output == OBJECT ) { // Return an integer-keyed array of row objects return $this->last_result; } elseif ( $output == OBJECT_K ) { // Return an array of row objects with keys from column 1 // (Duplicates are discarded) foreach ( $this->last_result as $row ) { $var_by_ref = get_object_vars( $row ); $key = array_shift( $var_by_ref ); if ( ! isset( $new_array[ $key ] ) ) $new_array[ $key ] = $row; } return $new_array; } elseif ( $output == ARRAY_A || $output == ARRAY_N ) { // Return an integer-keyed array of... if ( $this->last_result ) { foreach( (array) $this->last_result as $row ) { if ( $output == ARRAY_N ) { // ...integer-keyed row arrays $new_array[] = array_values( get_object_vars( $row ) ); } else { // ...column name-keyed row arrays $new_array[] = get_object_vars( $row ); } } } return $new_array; } elseif ( strtoupper( $output ) === OBJECT ) { // Back compat for OBJECT being previously case insensitive. return $this->last_result; } return null; } /** * Load the column metadata from the last query. * * @access protected */ protected function load_col_info() { if ( $this->col_info ) return; if ( $this->use_mysqli ) { for ( $i = 0; $i < @mysqli_num_fields( $this->result ); $i++ ) { $this->col_info[ $i ] = @mysqli_fetch_field( $this->result ); } } else { for ( $i = 0; $i < @mysql_num_fields( $this->result ); $i++ ) { $this->col_info[ $i ] = @mysql_fetch_field( $this->result, $i ); } } } /** * Retrieve column metadata from the last query. * * @param string $info_type Optional. Type one of name, table, def, max_length, not_null, primary_key, multiple_key, unique_key, numeric, blob, type, unsigned, zerofill * @param int $col_offset Optional. 0: col name. 1: which table the col's in. 2: col's max length. 3: if the col is numeric. 4: col's type * @return mixed Column Results */ function get_col_info( $info_type = 'name', $col_offset = -1 ) { $this->load_col_info(); if ( $this->col_info ) { if ( $col_offset == -1 ) { $i = 0; $new_array = array(); foreach( (array) $this->col_info as $col ) { $new_array[$i] = $col->{$info_type}; $i++; } return $new_array; } else { return $this->col_info[$col_offset]->{$info_type}; } } } /** * Starts the timer, for debugging purposes. * * @return true */ function timer_start() { $this->time_start = microtime( true ); return true; } /** * Stops the debugging timer. * * @return float Total time spent on the query, in seconds */ function timer_stop() { return ( microtime( true ) - $this->time_start ); } /** * Wraps errors in a nice header and footer and dies. * * Will not die if wpdb::$show_errors is false. * * @param string $message The Error message * @return false|void */ function bail( $message) { if ( !$this->show_errors ) { $this->error = $message; return false; } die($message); } /** * Whether MySQL database is at least the required minimum version. * * @return WP_Error */ function check_database_version() { global $wp_version, $required_mysql_version; // Make sure the server has the required MySQL version if ( version_compare($this->db_version(), $required_mysql_version, '<') ) return new WP_Error('database_version', sprintf( __( '<strong>ERROR</strong>: WordPress %1$s requires MySQL %2$s or higher' ), $wp_version, $required_mysql_version )); } /** * Whether the database supports collation. * * @since 2.5.0 * @deprecated 3.5.0 * @deprecated Use wpdb::has_cap( 'collation' ) * * @return bool True if collation is supported, false if version does not */ function supports_collation() { _deprecated_function( __FUNCTION__, '3.5', 'wpdb::has_cap( \'collation\' )' ); return $this->has_cap( 'collation' ); } /** * The database character collate. * * @return string The database character collate. */ public function get_charset_collate() { $charset_collate = ''; if ( ! empty( $this->charset ) ) $charset_collate = "DEFAULT CHARACTER SET $this->charset"; if ( ! empty( $this->collate ) ) $charset_collate .= " COLLATE $this->collate"; return $charset_collate; } /** * Determine if a database supports a particular feature. * * @param string $db_cap The feature to check for. * @return bool */ function has_cap( $db_cap ) { $version = $this->db_version(); switch ( strtolower( $db_cap ) ) { case 'collation' : // @since 2.5.0 case 'group_concat' : // @since 2.7.0 case 'subqueries' : // @since 2.7.0 return version_compare( $version, '4.1', '>=' ); case 'set_charset' : return version_compare( $version, '5.0.7', '>=' ); }; return false; } /** * Retrieve the name of the function that called wpdb. * * Searches up the list of functions until it reaches * the one that would most logically had called this method. * * @return string The name of the calling function */ function get_caller() { return $this->debug_backtrace_summary( __CLASS__ ); } function debug_backtrace_summary( $ignore_class = null, $skip_frames = 0, $pretty = true ) { if ( version_compare( PHP_VERSION, '5.2.5', '>=' ) ) $trace = debug_backtrace( false ); else $trace = debug_backtrace(); $caller = array(); $check_class = ! is_null( $ignore_class ); $skip_frames++; // skip this function foreach ( $trace as $call ) { if ( $skip_frames > 0 ) { $skip_frames--; } elseif ( isset( $call['class'] ) ) { if ( $check_class && $ignore_class == $call['class'] ) continue; // Filter out calls $caller[] = "{$call['class']}{$call['type']}{$call['function']}"; } else { $caller[] = $call['function']; } } if ( $pretty ) return join( ', ', array_reverse( $caller ) ); else return $caller; } /** * The database version number. * * @return false|string false on failure, version number on success */ function db_version() { if ( $this->use_mysqli ) { $server_info = mysqli_get_server_info( $this->dbh ); } else { $server_info = mysql_get_server_info( $this->dbh ); } return preg_replace( '/[^0-9.].*/', '', $server_info ); } } //Create an object of the wpdb class $wpdb = new wpdb(); |