/branches/2.0/wp-includes/wp-db.php
PHP | 380 lines | 268 code | 63 blank | 49 comment | 44 complexity | 99a081921d82a2696df7d8c0b912fdd5 MD5 | raw file
Possible License(s): AGPL-1.0, LGPL-2.0, LGPL-2.1, GPL-2.0
- <?php
- // WordPress DB Class
- // ORIGINAL CODE FROM:
- // Justin Vincent (justin@visunet.ie)
- // http://php.justinvincent.com
- define('EZSQL_VERSION', 'WP1.25');
- define('OBJECT', 'OBJECT', true);
- define('ARRAY_A', 'ARRAY_A', false);
- define('ARRAY_N', 'ARRAY_N', false);
- if (!defined('SAVEQUERIES'))
- define('SAVEQUERIES', false);
- class wpdb {
- var $show_errors = true;
- var $num_queries = 0;
- var $last_query;
- var $col_info;
- var $queries;
- // Our tables
- var $posts;
- var $users;
- var $categories;
- var $post2cat;
- var $comments;
- var $links;
- var $linkcategories;
- var $options;
- var $optiontypes;
- var $optionvalues;
- var $optiongroups;
- var $optiongroup_options;
- var $postmeta;
- // ==================================================================
- // DB Constructor - connects to the server and selects a database
- function wpdb($dbuser, $dbpassword, $dbname, $dbhost) {
- return $this->__construct($dbuser, $dbpassword, $dbname, $dbhost);
- }
-
- function __construct($dbuser, $dbpassword, $dbname, $dbhost) {
- register_shutdown_function(array(&$this, "__destruct"));
- $this->dbh = @mysql_connect($dbhost, $dbuser, $dbpassword);
- if (!$this->dbh) {
- $this->bail("
- <h1>Error establishing a database connection</h1>
- <p>This either means that the username and password information in your <code>wp-config.php</code> file is incorrect or we can't contact the database server at <code>$dbhost</code>. 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>
- <p>If you're unsure what these terms mean you should probably contact your host. If you still need help you can always visit the <a href='http://wordpress.org/support/'>WordPress Support Forums</a>.</p>
- ");
- }
- $this->select($dbname);
- }
- function __destruct() {
- return true;
- }
- // ==================================================================
- // Select a DB (if another one needs to be selected)
- function select($db) {
- if (!@mysql_select_db($db, $this->dbh)) {
- $this->bail("
- <h1>Can’t select database</h1>
- <p>We were able to connect to the database server (which means your username and password is okay) but not able to select the <code>$db</code> database.</p>
- <ul>
- <li>Are you sure it exists?</li>
- <li>On some systems the name of your database is prefixed with your username, so it would be like username_wordpress. Could that be the problem?</li>
- </ul>
- <p>If you don't know how to setup a database you should <strong>contact your host</strong>. If all else fails you may find help at the <a href='http://wordpress.org/support/'>WordPress Support Forums</a>.</p>");
- }
- }
- // ====================================================================
- // Format a string correctly for safe insert under all PHP conditions
-
- function escape($string) {
- return addslashes( $string ); // Disable rest for now, causing problems
- if( !$this->dbh || version_compare( phpversion(), '4.3.0' ) == '-1' )
- return mysql_escape_string( $string );
- else
- return mysql_real_escape_string( $string, $this->dbh );
- }
- // ==================================================================
- // Print SQL/DB error.
- function print_error($str = '') {
- global $EZSQL_ERROR;
- if (!$str) $str = mysql_error();
- $EZSQL_ERROR[] =
- array ('query' => $this->last_query, 'error_str' => $str);
- $str = htmlspecialchars($str, ENT_QUOTES);
- $query = htmlspecialchars($this->last_query, ENT_QUOTES);
- // Is error output turned on or not..
- if ( $this->show_errors ) {
- // If there is an error then take note of it
- print "<div id='error'>
- <p class='wpdberror'><strong>WordPress database error:</strong> [$str]<br />
- <code>$query</code></p>
- </div>";
- } else {
- return false;
- }
- }
- // ==================================================================
- // Turn error handling on or off..
- function show_errors() {
- $this->show_errors = true;
- }
-
- function hide_errors() {
- $this->show_errors = false;
- }
- // ==================================================================
- // Kill cached query results
- function flush() {
- $this->last_result = array();
- $this->col_info = null;
- $this->last_query = null;
- }
- // ==================================================================
- // Basic Query - see docs for more detail
- function query($query) {
- // filter the query, if filters are available
- // NOTE: some queries are made before the plugins have been loaded, and thus cannot be filtered with this method
- if ( function_exists('apply_filters') )
- $query = apply_filters('query', $query);
- // initialise return
- $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;
- // Perform the query via std mysql_query function..
- if (SAVEQUERIES)
- $this->timer_start();
-
- $this->result = @mysql_query($query, $this->dbh);
- ++$this->num_queries;
- if (SAVEQUERIES)
- $this->queries[] = array( $query, $this->timer_stop() );
- // If there is an error then take note of it..
- if ( mysql_error() ) {
- $this->print_error();
- return false;
- }
- if ( preg_match("/^\\s*(insert|delete|update|replace) /i",$query) ) {
- $this->rows_affected = mysql_affected_rows();
- // Take note of the insert_id
- if ( preg_match("/^\\s*(insert|replace) /i",$query) ) {
- $this->insert_id = mysql_insert_id($this->dbh);
- }
- // Return number of rows affected
- $return_val = $this->rows_affected;
- } else {
- $i = 0;
- while ($i < @mysql_num_fields($this->result)) {
- $this->col_info[$i] = @mysql_fetch_field($this->result);
- $i++;
- }
- $num_rows = 0;
- while ( $row = @mysql_fetch_object($this->result) ) {
- $this->last_result[$num_rows] = $row;
- $num_rows++;
- }
- @mysql_free_result($this->result);
- // Log number of rows the query returned
- $this->num_rows = $num_rows;
-
- // Return number of rows selected
- $return_val = $this->num_rows;
- }
- return $return_val;
- }
- // ==================================================================
- // Get one variable from the DB - see docs for more detail
- function get_var($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 ( $this->last_result[$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;
- }
- // ==================================================================
- // Get one row from the DB - see docs for more detail
- function get_row($query = null, $output = OBJECT, $y = 0) {
- $this->func_call = "\$db->get_row(\"$query\",$output,$y)";
- if ( $query )
- $this->query($query);
- 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;
- } else {
- $this->print_error(" \$db->get_row(string query, output type, int offset) -- Output type must be one of: OBJECT, ARRAY_A, ARRAY_N");
- }
- }
- // ==================================================================
- // Function to get 1 column from the cached result set based in X index
- // se docs for usage and info
- function get_col($query = null , $x = 0) {
- if ( $query )
- $this->query($query);
- // Extract the column values
- for ( $i=0; $i < count($this->last_result); $i++ ) {
- $new_array[$i] = $this->get_var(null, $x, $i);
- }
- return $new_array;
- }
- // ==================================================================
- // Return the the query as a result set - see docs for more details
- function get_results($query = null, $output = OBJECT) {
- $this->func_call = "\$db->get_results(\"$query\", $output)";
- if ( $query )
- $this->query($query);
- // Send back array of objects. Each row is an object
- if ( $output == OBJECT ) {
- return $this->last_result;
- } elseif ( $output == ARRAY_A || $output == ARRAY_N ) {
- if ( $this->last_result ) {
- $i = 0;
- foreach( $this->last_result as $row ) {
- $new_array[$i] = (array) $row;
- if ( $output == ARRAY_N ) {
- $new_array[$i] = array_values($new_array[$i]);
- }
- $i++;
- }
- return $new_array;
- } else {
- return null;
- }
- }
- }
- // ==================================================================
- // Function to get column meta data info pertaining to the last query
- // see docs for more info and usage
- function get_col_info($info_type = 'name', $col_offset = -1) {
- if ( $this->col_info ) {
- if ( $col_offset == -1 ) {
- $i = 0;
- foreach($this->col_info as $col ) {
- $new_array[$i] = $col->{$info_type};
- $i++;
- }
- return $new_array;
- } else {
- return $this->col_info[$col_offset]->{$info_type};
- }
- }
- }
- function timer_start() {
- $mtime = microtime();
- $mtime = explode(' ', $mtime);
- $this->time_start = $mtime[1] + $mtime[0];
- return true;
- }
-
- function timer_stop($precision = 3) {
- $mtime = microtime();
- $mtime = explode(' ', $mtime);
- $time_end = $mtime[1] + $mtime[0];
- $time_total = $time_end - $this->time_start;
- return $time_total;
- }
- function bail($message) { // Just wraps errors in a nice header and footer
- if ( !$this->show_errors )
- return false;
- header( 'Content-Type: text/html; charset=utf-8');
- echo <<<HEAD
- <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
- <html xmlns="http://www.w3.org/1999/xhtml">
- <head>
- <title>WordPress › Error</title>
- <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
- <style media="screen" type="text/css">
- <!--
- html {
- background: #eee;
- }
- body {
- background: #fff;
- color: #000;
- font-family: Georgia, "Times New Roman", Times, serif;
- margin-left: 25%;
- margin-right: 25%;
- padding: .2em 2em;
- }
-
- h1 {
- color: #006;
- font-size: 18px;
- font-weight: lighter;
- }
-
- h2 {
- font-size: 16px;
- }
-
- p, li, dt {
- line-height: 140%;
- padding-bottom: 2px;
- }
-
- ul, ol {
- padding: 5px 5px 5px 20px;
- }
- #logo {
- margin-bottom: 2em;
- }
- -->
- </style>
- </head>
- <body>
- <h1 id="logo"><img alt="WordPress" src="http://static.wordpress.org/logo.png" /></h1>
- HEAD;
- echo $message;
- echo "</body></html>";
- die();
- }
- }
- $wpdb = new wpdb(DB_USER, DB_PASSWORD, DB_NAME, DB_HOST);
- ?>