Subversion-Projekte lars-tiefland.prado

<?php
/**
 * TVarDumper class file
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.pradosoft.com/
 * @copyright Copyright &copy; 2005-2008 PradoSoft
 * @license http://www.pradosoft.com/license/
 * @version $Id: TVarDumper.php 2541 2008-10-21 15:05:13Z qiang.xue $
 * @package System.Util
 */

/**
 * TVarDumper class.
 *
 * TVarDumper is intended to replace the buggy PHP function var_dump and print_r.
 * It can correctly identify the recursively referenced objects in a complex
 * object structure. It also has a recursive depth control to avoid indefinite
 * recursive display of some peculiar variables.
 *
 * TVarDumper can be used as follows,
 * <code>
 *   echo TVarDumper::dump($var);
 * </code>
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version $Id: TVarDumper.php 2541 2008-10-21 15:05:13Z qiang.xue $
 * @package System.Util
 * @since 3.0
 */
class TVarDumper
{
        private static $_objects;
        private static $_output;
        private static $_depth;

        /**
         * Converts a variable into a string representation.
         * This method achieves the similar functionality as var_dump and print_r
         * but is more robust when handling complex objects such as PRADO controls.
         * @param mixed variable to be dumped
         * @param integer maximum depth that the dumper should go into the variable. Defaults to 10.
         * @return string the string representation of the variable
         */
        public static function dump($var,$depth=10,$highlight=false)
        {
                self::$_output='';
                self::$_objects=array();
                self::$_depth=$depth;
                self::dumpInternal($var,0);
                if($highlight)
                {
                        $result=highlight_string("<?php\n".self::$_output,true);
                        return preg_replace('/&lt;\\?php<br \\/>/','',$result,1);
                }
                else
                        return self::$_output;
        }

        private static function dumpInternal($var,$level)
        {
                switch(gettype($var))
                {
                        case 'boolean':
                                self::$_output.=$var?'true':'false';
                                break;
                        case 'integer':
                                self::$_output.="$var";
                                break;
                        case 'double':
                                self::$_output.="$var";
                                break;
                        case 'string':
                                self::$_output.="'$var'";
                                break;
                        case 'resource':
                                self::$_output.='{resource}';
                                break;
                        case 'NULL':
                                self::$_output.="null";
                                break;
                        case 'unknown type':
                                self::$_output.='{unknown}';
                                break;
                        case 'array':
                                if(self::$_depth<=$level)
                                        self::$_output.='array(...)';
                                else if(empty($var))
                                        self::$_output.='array()';
                                else
                                {
                                        $keys=array_keys($var);
                                        $spaces=str_repeat(' ',$level*4);
                                        self::$_output.="array\n".$spaces.'(';
                                        foreach($keys as $key)
                                        {
                                                self::$_output.="\n".$spaces."    [$key] => ";
                                                self::$_output.=self::dumpInternal($var[$key],$level+1);
                                        }
                                        self::$_output.="\n".$spaces.')';
                                }
                                break;
                        case 'object':
                                if(($id=array_search($var,self::$_objects,true))!==false)
                                        self::$_output.=get_class($var).'#'.($id+1).'(...)';
                                else if(self::$_depth<=$level)
                                        self::$_output.=get_class($var).'(...)';
                                else
                                {
                                        $id=array_push(self::$_objects,$var);
                                        $className=get_class($var);
                                        $members=(array)$var;
                                        $keys=array_keys($members);
                                        $spaces=str_repeat(' ',$level*4);
                                        self::$_output.="$className#$id\n".$spaces.'(';
                                        foreach($keys as $key)
                                        {
                                                $keyDisplay=strtr(trim($key),array("\0"=>':'));
                                                self::$_output.="\n".$spaces."    [$keyDisplay] => ";
                                                self::$_output.=self::dumpInternal($members[$key],$level+1);
                                        }
                                        self::$_output.="\n".$spaces.')';
                                }
                                break;
                }
        }
}