__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("
Error establishing a database connection
This either means that the username and password information in your wp-config.php file is incorrect or we can't contact the database server at $dbhost. This could mean your host's database server is down.
- Are you sure you have the correct username and password?
- Are you sure that you have typed the correct hostname?
- Are you sure that the database server is running?
If you're unsure what these terms mean you should probably contact your host. If you still need help you can always visit the WordPress Support Forums.
");
}
$this->select($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("
Can’t select database
We were able to connect to the database server (which means your username and password is okay) but not able to select the $db database.
- Are you sure it exists?
- On some systems the name of your database is prefixed with your username, so it would be like username_wordpress. Could that be the problem?
If you don't know how to setup a database you should contact your host. If all else fails you may find help at the WordPress Support Forums.
");
}
}
// ====================================================================
// Format a string correctly for safe insert under all PHP conditions
function escape($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 ( $this->show_errors ) {
// If there is an error then take note of it
print "
WordPress database error: [$str]
$query
";
} 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 <<
WordPress › Error
HEAD;
echo $message;
echo "";
die();
}
}
$wpdb = new wpdb(DB_USER, DB_PASSWORD, DB_NAME, DB_HOST);
?>