WebKitSite/blog/wp-includes/wp-db.php - WebKit - Git at Google

 <?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 = false;
 	var $num_queries = 0;
 	var $last_query;
 	var $col_info;
 	var $queries;
 	var $ready = false;

 	// Our tables
 	var $posts;
 	var $users;
 	var $categories;
 	var $post2cat;
 	var $comments;
 	var $links;
 	var $options;
 	var $optiontypes;
 	var $optionvalues;
 	var $optiongroups;
 	var $optiongroup_options;
 	var $postmeta;
 	var $usermeta;
 	var $terms;
 	var $term_taxonomy;
 	var $term_relationships;

 	var $charset;
 	var $collate;

 	/**
 	 * Connects to the database server and selects a database
 	 * @param string $dbuser
 	 * @param string $dbpassword
 	 * @param string $dbname
 	 * @param string $dbhost
 	 */
 	function wpdb($dbuser, $dbpassword, $dbname, $dbhost) {
 		return $this->__construct($dbuser, $dbpassword, $dbname, $dbhost);
 	}

 	function __construct($dbuser, $dbpassword, $dbname, $dbhost) {
 		register_shutdown_function(array(&$this, "__destruct"));

 		if ( defined('WP_DEBUG') and WP_DEBUG == true )
 			$this->show_errors();

 		if ( defined('DB_CHARSET') )
 			$this->charset = DB_CHARSET;

 		if ( defined('DB_COLLATE') )
 			$this->collate = DB_COLLATE;

 		$this->dbh = @mysql_connect($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>
 ");
 			return;
 		}

 		$this->ready = true;

 		if ( !empty($this->charset) && version_compare(mysql_get_server_info(), '4.1.0', '>=') )
  			$this->query("SET NAMES '$this->charset'");

 		$this->select($dbname);
 	}

 	function __destruct() {
 		return true;
 	}

 	/**
 	 * Selects a database using the current class's $this->dbh
 	 * @param string $db name
 	 */
 	function select($db) {
 		if (!@mysql_select_db($db, $this->dbh)) {
 			$this->ready = false;
 			$this->bail("
 <h1>Can&#8217;t select database</h1>
 <p>We were able to connect to the database server (which means your username and password is okay) but not able to select the <code>$db</code> database.</p>
 <ul>
 <li>Are you sure it exists?</li>
 <li>Does the user <code>".DB_USER."</code> have permission to use the <code>$db</code> database?</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>");
 			return;
 		}
 	}

 	/**
 	 * Escapes content for insertion into the database, for security
 	 *
 	 * @param string $string
 	 * @return string query safe string
 	 */
 	function escape($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 );
 	}

 	/**
 	 * Escapes content by reference for insertion into the database, for security
 	 * @param string $s
 	 */
 	function escape_by_ref(&$s) {
 		$s = $this->escape($s);
 	}

 	/**
 	 * Prepares a SQL query for safe use, using sprintf() syntax
 	 */
 	function prepare($args=NULL) {
 		if ( NULL === $args )
 			return;
 		$args = func_get_args();
 		$query = array_shift($args);
 		$query = str_replace("'%s'", '%s', $query); // in case someone mistakenly already singlequoted it
 		$query = str_replace('"%s"', '%s', $query); // doublequote unquoting
 		$query = str_replace('%s', "'%s'", $query); // quote the strings
 		array_walk($args, array(&$this, 'escape_by_ref'));
 		return @vsprintf($query, $args);
 	}

 	// ==================================================================
 	//	Print SQL/DB error.

 	function print_error($str = '') {
 		global $EZSQL_ERROR;
 		if (!$str) $str = mysql_error($this->dbh);
 		$EZSQL_ERROR[] =
 		array ('query' => $this->last_query, 'error_str' => $str);

 		$error_str = "WordPress database error $str for query $this->last_query";
 		error_log($error_str, 0);

 		// Is error output turned on or not..
 		if ( !$this->show_errors )
 			return false;

 		$str = htmlspecialchars($str, ENT_QUOTES);
 		$query = htmlspecialchars($this->last_query, ENT_QUOTES);

 		// 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>";
 	}

 	// ==================================================================
 	//	Turn error handling on or off..

 	function show_errors( $show = true ) {
 		$errors = $this->show_errors;
 		$this->show_errors = $show;
 		return $errors;
 	}

 	function hide_errors() {
 		$show = $this->show_errors;
 		$this->show_errors = false;
 		return $show;
 	}

 	// ==================================================================
 	//	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) {
 		if ( ! $this->ready )
 			return false;

 		// 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->dbh) ) {
 			$this->print_error();
 			return false;
 		}

 		if ( preg_match("/^\\s*(insert|delete|update|replace) /i",$query) ) {
 			$this->rows_affected = mysql_affected_rows($this->dbh);
 			// 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 database
 	 * @param string $query (can be null as well, for caching, see codex)
 	 * @param int $x = 0 row num to return
 	 * @param int $y = 0 col num to return
 	 * @return mixed results
 	 */
 	function get_var($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 database
 	 * @param string $query
 	 * @param string $output ARRAY_A | ARRAY_N | OBJECT
 	 * @param int $y row num to return
 	 * @return mixed results
 	 */
 	function get_row($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;
 		} else {
 			$this->print_error(" \$db->get_row(string query, output type, int offset) -- Output type must be one of: OBJECT, ARRAY_A, ARRAY_N");
 		}
 	}

 	/**
 	 * Gets one column from the database
 	 * @param string $query (can be null as well, for caching, see codex)
 	 * @param int $x col num to return
 	 * @return array results
 	 */
 	function get_col($query = null , $x = 0) {
 		if ( $query )
 			$this->query($query);

 		$new_array = array();
 		// 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 an entire result set from the database
 	 * @param string $query (can also be null to pull from the cache)
 	 * @param string $output ARRAY_A | ARRAY_N | OBJECT
 	 * @return mixed results
 	 */
 	function get_results($query = null, $output = OBJECT) {
 		$this->func_call = "\$db->get_results(\"$query\", $output)";

 		if ( $query )
 			$this->query($query);
 		else
 			return null;

 		// 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;
 			}
 		}
 	}

 	/**
 	 * Grabs column metadata from the last query
 	 * @param string $info_type one of name, table, def, max_length, not_null, primary_key, multiple_key, unique_key, numeric, blob, type, unsigned, zerofill
 	 * @param int $col_offset 0: col name. 1: which table the col's in. 2: col's max length. 3: if the col is numeric. 4: col's type
 	 * @return mixed results
 	 */
 	function get_col_info($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};
 			}
 		}
 	}

 	/**
 	 * Starts the timer, for debugging purposes
 	 */
 	function timer_start() {
 		$mtime = microtime();
 		$mtime = explode(' ', $mtime);
 		$this->time_start = $mtime[1] + $mtime[0];
 		return true;
 	}

 	/**
 	 * Stops the debugging timer
 	 * @return int total time spent on the query, in milliseconds
 	 */
 	function timer_stop() {
 		$mtime = microtime();
 		$mtime = explode(' ', $mtime);
 		$time_end = $mtime[1] + $mtime[0];
 		$time_total = $time_end - $this->time_start;
 		return $time_total;
 	}

 	/**
 	 * Wraps fatal errors in a nice header and footer and dies.
 	 * @param string $message
 	 */
 	function bail($message) { // Just wraps errors in a nice header and footer
 		if ( !$this->show_errors ) {
 			if ( class_exists('WP_Error') )
 				$this->error = new WP_Error('500', $message);
 			else
 				$this->error = $message;
 			return false;
 		}
 		wp_die($message);
 	}
 }

 if ( ! isset($wpdb) )
 	$wpdb = new wpdb(DB_USER, DB_PASSWORD, DB_NAME, DB_HOST);
 ?>
	<?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 = false;
	var $num_queries = 0;
	var $last_query;
	var $col_info;
	var $queries;
	var $ready = false;

	// Our tables
	var $posts;
	var $users;
	var $categories;
	var $post2cat;
	var $comments;
	var $links;
	var $options;
	var $optiontypes;
	var $optionvalues;
	var $optiongroups;
	var $optiongroup_options;
	var $postmeta;
	var $usermeta;
	var $terms;
	var $term_taxonomy;
	var $term_relationships;

	var $charset;
	var $collate;

	/**
	* Connects to the database server and selects a database
	* @param string $dbuser
	* @param string $dbpassword
	* @param string $dbname
	* @param string $dbhost
	*/
	function wpdb($dbuser, $dbpassword, $dbname, $dbhost) {
	return $this->__construct($dbuser, $dbpassword, $dbname, $dbhost);
	}

	function __construct($dbuser, $dbpassword, $dbname, $dbhost) {
	register_shutdown_function(array(&$this, "__destruct"));

	if ( defined('WP_DEBUG') and WP_DEBUG == true )
	$this->show_errors();

	if ( defined('DB_CHARSET') )
	$this->charset = DB_CHARSET;

	if ( defined('DB_COLLATE') )
	$this->collate = DB_COLLATE;

	$this->dbh = @mysql_connect($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>
	");
	return;
	}

	$this->ready = true;

	if ( !empty($this->charset) && version_compare(mysql_get_server_info(), '4.1.0', '>=') )
	$this->query("SET NAMES '$this->charset'");

	$this->select($dbname);
	}

	function __destruct() {
	return true;
	}

	/**
	* Selects a database using the current class's $this->dbh
	* @param string $db name
	*/
	function select($db) {
	if (!@mysql_select_db($db, $this->dbh)) {
	$this->ready = false;
	$this->bail("
	<h1>Can’t select database</h1>
	<p>We were able to connect to the database server (which means your username and password is okay) but not able to select the <code>$db</code> database.</p>
	<ul>
	<li>Are you sure it exists?</li>
	<li>Does the user <code>".DB_USER."</code> have permission to use the <code>$db</code> database?</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>");
	return;
	}
	}

	/**
	* Escapes content for insertion into the database, for security
	*
	* @param string $string
	* @return string query safe string
	*/
	function escape($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 );
	}

	/**
	* Escapes content by reference for insertion into the database, for security
	* @param string $s
	*/
	function escape_by_ref(&$s) {
	$s = $this->escape($s);
	}

	/**
	* Prepares a SQL query for safe use, using sprintf() syntax
	*/
	function prepare($args=NULL) {
	if ( NULL === $args )
	return;
	$args = func_get_args();
	$query = array_shift($args);
	$query = str_replace("'%s'", '%s', $query); // in case someone mistakenly already singlequoted it
	$query = str_replace('"%s"', '%s', $query); // doublequote unquoting
	$query = str_replace('%s', "'%s'", $query); // quote the strings
	array_walk($args, array(&$this, 'escape_by_ref'));
	return @vsprintf($query, $args);
	}

	// ==================================================================
	// Print SQL/DB error.

	function print_error($str = '') {
	global $EZSQL_ERROR;
	if (!$str) $str = mysql_error($this->dbh);
	$EZSQL_ERROR[] =
	array ('query' => $this->last_query, 'error_str' => $str);

	$error_str = "WordPress database error $str for query $this->last_query";
	error_log($error_str, 0);

	// Is error output turned on or not..
	if ( !$this->show_errors )
	return false;

	$str = htmlspecialchars($str, ENT_QUOTES);
	$query = htmlspecialchars($this->last_query, ENT_QUOTES);

	// 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>";
	}

	// ==================================================================
	// Turn error handling on or off..

	function show_errors( $show = true ) {
	$errors = $this->show_errors;
	$this->show_errors = $show;
	return $errors;
	}

	function hide_errors() {
	$show = $this->show_errors;
	$this->show_errors = false;
	return $show;
	}

	// ==================================================================
	// 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) {
	if ( ! $this->ready )
	return false;

	// 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->dbh) ) {
	$this->print_error();
	return false;
	}

	if ( preg_match("/^\\s*(insert\|delete\|update\|replace) /i",$query) ) {
	$this->rows_affected = mysql_affected_rows($this->dbh);
	// 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 database
	* @param string $query (can be null as well, for caching, see codex)
	* @param int $x = 0 row num to return
	* @param int $y = 0 col num to return
	* @return mixed results
	*/
	function get_var($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 database
	* @param string $query
	* @param string $output ARRAY_A \| ARRAY_N \| OBJECT
	* @param int $y row num to return
	* @return mixed results
	*/
	function get_row($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;
	} else {
	$this->print_error(" \$db->get_row(string query, output type, int offset) -- Output type must be one of: OBJECT, ARRAY_A, ARRAY_N");
	}
	}

	/**
	* Gets one column from the database
	* @param string $query (can be null as well, for caching, see codex)
	* @param int $x col num to return
	* @return array results
	*/
	function get_col($query = null , $x = 0) {
	if ( $query )
	$this->query($query);

	$new_array = array();
	// 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 an entire result set from the database
	* @param string $query (can also be null to pull from the cache)
	* @param string $output ARRAY_A \| ARRAY_N \| OBJECT
	* @return mixed results
	*/
	function get_results($query = null, $output = OBJECT) {
	$this->func_call = "\$db->get_results(\"$query\", $output)";

	if ( $query )
	$this->query($query);
	else
	return null;

	// 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;
	}
	}
	}

	/**
	* Grabs column metadata from the last query
	* @param string $info_type one of name, table, def, max_length, not_null, primary_key, multiple_key, unique_key, numeric, blob, type, unsigned, zerofill
	* @param int $col_offset 0: col name. 1: which table the col's in. 2: col's max length. 3: if the col is numeric. 4: col's type
	* @return mixed results
	*/
	function get_col_info($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};
	}
	}
	}

	/**
	* Starts the timer, for debugging purposes
	*/
	function timer_start() {
	$mtime = microtime();
	$mtime = explode(' ', $mtime);
	$this->time_start = $mtime[1] + $mtime[0];
	return true;
	}

	/**
	* Stops the debugging timer
	* @return int total time spent on the query, in milliseconds
	*/
	function timer_stop() {
	$mtime = microtime();
	$mtime = explode(' ', $mtime);
	$time_end = $mtime[1] + $mtime[0];
	$time_total = $time_end - $this->time_start;
	return $time_total;
	}

	/**
	* Wraps fatal errors in a nice header and footer and dies.
	* @param string $message
	*/
	function bail($message) { // Just wraps errors in a nice header and footer
	if ( !$this->show_errors ) {
	if ( class_exists('WP_Error') )
	$this->error = new WP_Error('500', $message);
	else
	$this->error = $message;
	return false;
	}
	wp_die($message);
	}
	}

	if ( ! isset($wpdb) )
	$wpdb = new wpdb(DB_USER, DB_PASSWORD, DB_NAME, DB_HOST);
	?>