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< ? php
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// WordPress DB Class
// ORIGINAL CODE FROM:
// Justin Vincent (justin@visunet.ie)
// http://php.justinvincent.com
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define ( 'EZSQL_VERSION' , 'WP1.25' );
define ( 'OBJECT' , 'OBJECT' , true );
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define ( 'OBJECT_K' , 'OBJECT_K' , false );
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define ( 'ARRAY_A' , 'ARRAY_A' , false );
define ( 'ARRAY_N' , 'ARRAY_N' , false );
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if ( ! defined ( 'SAVEQUERIES' ))
define ( 'SAVEQUERIES' , false );
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class wpdb {
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var $show_errors = false ;
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var $suppress_errors = false ;
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var $num_queries = 0 ;
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var $last_query ;
var $col_info ;
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var $queries ;
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var $prefix = '' ;
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var $ready = false ;
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// Our tables
var $posts ;
var $users ;
var $categories ;
var $post2cat ;
var $comments ;
var $links ;
var $options ;
var $postmeta ;
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var $usermeta ;
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var $terms ;
var $term_taxonomy ;
var $term_relationships ;
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var $tables = array ( 'users' , 'usermeta' , 'posts' , 'categories' , 'post2cat' , 'comments' , 'links' , 'link2cat' , 'options' ,
'postmeta' , 'terms' , 'term_taxonomy' , 'term_relationships' );
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var $charset ;
var $collate ;
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/**
* Connects to the database server and selects a database
* @ param string $dbuser
* @ param string $dbpassword
* @ param string $dbname
* @ param string $dbhost
*/
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function wpdb ( $dbuser , $dbpassword , $dbname , $dbhost ) {
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return $this -> __construct ( $dbuser , $dbpassword , $dbname , $dbhost );
}
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function __construct ( $dbuser , $dbpassword , $dbname , $dbhost ) {
register_shutdown_function ( array ( & $this , " __destruct " ));
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if ( defined ( 'WP_DEBUG' ) and WP_DEBUG == true )
$this -> show_errors ();
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if ( defined ( 'DB_CHARSET' ) )
$this -> charset = DB_CHARSET ;
if ( defined ( 'DB_COLLATE' ) )
$this -> collate = DB_COLLATE ;
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$this -> dbh = @ mysql_connect ( $dbhost , $dbuser , $dbpassword , true );
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if ( ! $this -> dbh ) {
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$this -> bail ( "
< h1 > Error establishing a database connection </ h1 >
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< 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>$dbhost</code>. This could mean your host' s database server is down .</ p >
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< ul >
< li > Are you sure you have the correct username and password ? </ li >
< li > Are you sure that you have typed the correct hostname ? </ li >
< li > Are you sure that the database server is running ? </ li >
</ ul >
< p > If you 're unsure what these terms mean you should probably contact your host. If you still need help you can always visit the <a href=' http :// wordpress . org / support / ' > WordPress Support Forums </ a >.</ p >
" );
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return ;
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}
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$this -> ready = true ;
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if ( ! empty ( $this -> charset ) && version_compare ( mysql_get_server_info ( $this -> dbh ), '4.1.0' , '>=' ) )
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$this -> query ( " SET NAMES ' $this->charset ' " );
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$this -> select ( $dbname );
}
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function __destruct () {
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return true ;
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}
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function set_prefix ( $prefix ) {
if ( preg_match ( '|[^a-z0-9_]|i' , $prefix ) )
return new WP_Error ( 'invalid_db_prefix' , 'Invalid database prefix' ); // No gettext here
$old_prefix = $this -> prefix ;
$this -> prefix = $prefix ;
foreach ( $this -> tables as $table )
$this -> $table = $this -> prefix . $table ;
if ( defined ( 'CUSTOM_USER_TABLE' ) )
$this -> users = CUSTOM_USER_TABLE ;
if ( defined ( 'CUSTOM_USER_META_TABLE' ) )
$this -> usermeta = CUSTOM_USER_META_TABLE ;
return $old_prefix ;
}
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/**
* Selects a database using the current class ' s $this -> dbh
* @ param string $db name
*/
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function select ( $db ) {
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if ( !@ mysql_select_db ( $db , $this -> dbh )) {
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$this -> ready = false ;
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$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 >
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< li > Does the user < code > " .DB_USER. " </ code > have permission to use the < code > $db </ code > database ? </ li >
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< 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 >
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< 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 > " );
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return ;
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}
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}
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/**
* Escapes content for insertion into the database , for security
*
* @ param string $string
* @ return string query safe string
*/
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function escape ( $string ) {
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return addslashes ( $string );
// Disable rest for now, causing problems
/*
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if ( ! $this -> dbh || version_compare ( phpversion (), '4.3.0' ) == '-1' )
return mysql_escape_string ( $string );
else
return mysql_real_escape_string ( $string , $this -> dbh );
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*/
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}
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/**
* 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 ( $args );
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$query = str_replace ( " '%s' " , '%s' , $query ); // in case someone mistakenly already singlequoted it
$query = str_replace ( '"%s"' , '%s' , $query ); // doublequote unquoting
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$query = str_replace ( '%s' , " '%s' " , $query ); // quote the strings
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array_walk ( $args , array ( & $this , 'escape_by_ref' ));
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return @ vsprintf ( $query , $args );
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}
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// ==================================================================
// Print SQL/DB error.
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function print_error ( $str = '' ) {
global $EZSQL_ERROR ;
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if ( ! $str ) $str = mysql_error ( $this -> dbh );
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$EZSQL_ERROR [] =
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array ( 'query' => $this -> last_query , 'error_str' => $str );
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if ( $this -> suppress_errors )
return false ;
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$error_str = " WordPress database error $str for query $this->last_query " ;
if ( $caller = $this -> get_caller () )
$error_str .= " made by $caller " ;
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$log_error = true ;
if ( ! function_exists ( 'error_log' ) )
$log_error = false ;
$log_file = @ ini_get ( 'error_log' );
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if ( ! empty ( $log_file ) && ( 'syslog' != $log_file ) && ! is_writable ( $log_file ) )
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$log_error = false ;
if ( $log_error )
@ error_log ( $error_str , 0 );
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// Is error output turned on or not..
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if ( ! $this -> show_errors )
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return false ;
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$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 > " ;
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}
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// ==================================================================
// Turn error handling on or off..
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function show_errors ( $show = true ) {
$errors = $this -> show_errors ;
$this -> show_errors = $show ;
return $errors ;
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}
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function hide_errors () {
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$show = $this -> show_errors ;
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$this -> show_errors = false ;
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return $show ;
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}
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function suppress_errors ( $suppress = true ) {
$errors = $this -> suppress_errors ;
$this -> suppress_errors = $suppress ;
return $errors ;
}
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// ==================================================================
// Kill cached query results
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function flush () {
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$this -> last_result = array ();
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$this -> col_info = null ;
$this -> last_query = null ;
}
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// ==================================================================
// Basic Query - see docs for more detail
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function query ( $query ) {
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if ( ! $this -> ready )
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return false ;
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// 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 );
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// initialise return
$return_val = 0 ;
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$this -> flush ();
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// 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..
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if ( SAVEQUERIES )
$this -> timer_start ();
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$this -> result = @ mysql_query ( $query , $this -> dbh );
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++ $this -> num_queries ;
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if ( SAVEQUERIES )
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$this -> queries [] = array ( $query , $this -> timer_stop (), $this -> get_caller () );
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// If there is an error then take note of it..
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if ( mysql_error ( $this -> dbh ) ) {
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$this -> print_error ();
return false ;
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}
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if ( preg_match ( " /^ \\ s*(insert|delete|update|replace) /i " , $query ) ) {
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$this -> rows_affected = mysql_affected_rows ( $this -> dbh );
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// Take note of the insert_id
if ( preg_match ( " /^ \\ s*(insert|replace) /i " , $query ) ) {
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$this -> insert_id = mysql_insert_id ( $this -> dbh );
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}
// Return number of rows affected
$return_val = $this -> rows_affected ;
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} else {
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$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 ++ ;
}
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@ mysql_free_result ( $this -> result );
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// Log number of rows the query returned
$this -> num_rows = $num_rows ;
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// Return number of rows selected
$return_val = $this -> num_rows ;
}
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return $return_val ;
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}
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/**
* Insert an array of data into a table
* @ param string $table WARNING : not sanitized !
* @ param array $data should not already be SQL - escaped
* @ return mixed results of $this -> query ()
*/
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function insert ( $table , $data ) {
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$data = add_magic_quotes ( $data );
$fields = array_keys ( $data );
return $this -> query ( " INSERT INTO $table (` " . implode ( '`,`' , $fields ) . " `) VALUES (' " . implode ( " ',' " , $data ) . " ') " );
}
/**
* Update a row in the table with an array of data
* @ param string $table WARNING : not sanitized !
* @ param array $data should not already be SQL - escaped
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* @ param array $where a named array of WHERE column => value relationships . Multiple member pairs will be joined with ANDs . WARNING : the column names are not currently sanitized !
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* @ return mixed results of $this -> query ()
*/
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function update ( $table , $data , $where ){
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$data = add_magic_quotes ( $data );
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$bits = $wheres = array ();
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foreach ( array_keys ( $data ) as $k )
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$bits [] = " ` $k ` = ' $data[$k] ' " ;
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if ( is_array ( $where ) )
foreach ( $where as $c => $v )
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$wheres [] = " $c = ' " . $this -> escape ( $v ) . " ' " ;
else
return false ;
return $this -> query ( " UPDATE $table SET " . implode ( ', ' , $bits ) . ' WHERE ' . implode ( ' AND ' , $wheres ) . ' LIMIT 1' );
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}
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/**
* 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
*/
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function get_var ( $query = null , $x = 0 , $y = 0 ) {
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$this -> func_call = " \$ db->get_var( \" $query\ " , $x , $y ) " ;
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if ( $query )
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$this -> query ( $query );
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// Extract var out of cached results based x,y vals
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if ( ! empty ( $this -> last_result [ $y ] ) ) {
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$values = array_values ( get_object_vars ( $this -> last_result [ $y ]));
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}
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// If there is a value return it else return null
return ( isset ( $values [ $x ]) && $values [ $x ] !== '' ) ? $values [ $x ] : null ;
}
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/**
* 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
*/
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function get_row ( $query = null , $output = OBJECT , $y = 0 ) {
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$this -> func_call = " \$ db->get_row( \" $query\ " , $output , $y ) " ;
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if ( $query )
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$this -> query ( $query );
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else
return null ;
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if ( ! isset ( $this -> last_result [ $y ]) )
return null ;
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if ( $output == OBJECT ) {
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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 [ $y ])) : null ;
} else {
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$this -> print_error ( " \$ db->get_row(string query, output type, int offset) -- Output type must be one of: OBJECT, ARRAY_A, ARRAY_N " );
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}
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}
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/**
* 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
*/
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function get_col ( $query = null , $x = 0 ) {
if ( $query )
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$this -> query ( $query );
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$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 );
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}
return $new_array ;
}
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/**
* Return an entire result set from the database
* @ param string $query ( can also be null to pull from the cache )
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* @ param string $output ARRAY_A | ARRAY_N | OBJECT_K | OBJECT
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* @ return mixed results
*/
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function get_results ( $query = null , $output = OBJECT ) {
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$this -> func_call = " \$ db->get_results( \" $query\ " , $output ) " ;
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if ( $query )
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$this -> query ( $query );
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else
return null ;
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if ( $output == OBJECT ) {
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// Return an integer-keyed array of row objects
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return $this -> last_result ;
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} elseif ( $output == OBJECT_K ) {
// Return an array of row objects with keys from column 1
// (Duplicates are discarded)
foreach ( $this -> last_result as $row ) {
$key = array_shift ( get_object_vars ( $row ) );
if ( ! isset ( $new_array [ $key ] ) )
$new_array [ $key ] = $row ;
}
return $new_array ;
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} elseif ( $output == ARRAY_A || $output == ARRAY_N ) {
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// Return an integer-keyed array of...
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if ( $this -> last_result ) {
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$i = 0 ;
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foreach ( $this -> last_result as $row ) {
if ( $output == ARRAY_N ) {
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// ...integer-keyed row arrays
$new_array [ $i ] = array_values ( get_object_vars ( $row ) );
} else {
// ...column name-keyed row arrays
$new_array [ $i ] = get_object_vars ( $row );
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}
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++ $i ;
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}
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return $new_array ;
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}
}
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}
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/**
* 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
*/
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function get_col_info ( $info_type = 'name' , $col_offset = - 1 ) {
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if ( $this -> col_info ) {
if ( $col_offset == - 1 ) {
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$i = 0 ;
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foreach ( $this -> col_info as $col ) {
$new_array [ $i ] = $col -> { $info_type };
$i ++ ;
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}
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return $new_array ;
} else {
return $this -> col_info [ $col_offset ] -> { $info_type };
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}
}
}
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/**
* Starts the timer , for debugging purposes
*/
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function timer_start () {
$mtime = microtime ();
$mtime = explode ( ' ' , $mtime );
$this -> time_start = $mtime [ 1 ] + $mtime [ 0 ];
return true ;
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}
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/**
* Stops the debugging timer
* @ return int total time spent on the query , in milliseconds
*/
function timer_stop () {
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$mtime = microtime ();
$mtime = explode ( ' ' , $mtime );
$time_end = $mtime [ 1 ] + $mtime [ 0 ];
$time_total = $time_end - $this -> time_start ;
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return $time_total ;
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}
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/**
* Wraps fatal errors in a nice header and footer and dies .
* @ param string $message
*/
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function bail ( $message ) { // Just wraps errors in a nice header and footer
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if ( ! $this -> show_errors ) {
if ( class_exists ( 'WP_Error' ) )
$this -> error = new WP_Error ( '500' , $message );
else
$this -> error = $message ;
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return false ;
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}
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wp_die ( $message );
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}
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/**
* Checks wether of not the database version is high enough to support the features WordPress uses
* @ global $wp_version
*/
function check_database_version ()
{
global $wp_version ;
// Make sure the server has MySQL 4.0
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$mysql_version = preg_replace ( '|[^0-9\.]|' , '' , @ mysql_get_server_info ( $this -> dbh ));
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if ( version_compare ( $mysql_version , '4.0.0' , '<' ) )
return new WP_Error ( 'database_version' , sprintf ( __ ( '<strong>ERROR</strong>: WordPress %s requires MySQL 4.0.0 or higher' ), $wp_version ));
}
/**
* This function is called when WordPress is generating the table schema to determine wether or not the current database
* supports or needs the collation statements .
*/
function supports_collation ()
{
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return ( version_compare ( mysql_get_server_info ( $this -> dbh ), '4.1.0' , '>=' ) );
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}
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/**
* Get the name of the function that called wpdb .
* @ return string the name of the calling function
*/
function get_caller () {
// requires PHP 4.3+
if ( ! is_callable ( 'debug_backtrace' ) )
return '' ;
$bt = debug_backtrace ();
$caller = '' ;
foreach ( $bt as $trace ) {
if ( @ $trace [ 'class' ] == __CLASS__ )
continue ;
elseif ( strtolower ( @ $trace [ 'function' ]) == 'call_user_func_array' )
continue ;
elseif ( strtolower ( @ $trace [ 'function' ]) == 'apply_filters' )
continue ;
elseif ( strtolower ( @ $trace [ 'function' ]) == 'do_action' )
continue ;
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$caller = $trace [ 'function' ];
break ;
}
return $caller ;
}
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}
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if ( ! isset ( $wpdb ) )
$wpdb = new wpdb ( DB_USER , DB_PASSWORD , DB_NAME , DB_HOST );
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?>