Update Config

function update_config( $config )
{
    $buffer         = array();
    $buffer[]       = '<?php';
    $buffer[]       = 'defined(\'_VALID\') or die(\'Restricted Access!\');';
    foreach( $config as $key => $value ) {
        if ( !preg_match('/^[A-Z_]+/', $key) && !preg_match('/^db_(.*)/', $key) ) {
        	$buffer[]   = '$config[\'' .$key. '\'] = \'' .str_replace('\'', ''', $value). '\';';
        }
    }
    $buffer[]       = '?>';
    
    $data           = implode("\n", $buffer);
    $path           = $config['BASE_DIR']. '/include/config.local.php';

    $fp = fopen($path, 'wb');
    if ($fp) {
        flock($fp, LOCK_EX);
        $len = strlen($data);
        fwrite($fp, $data, $len);
        flock($fp, LOCK_UN);
        fclose($fp);
    }
}