VarDumper.php 4.01 KB
Newer Older
Alexander Makarov committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144
<?php
/**
 * VarDumper class file.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.yiiframework.com/
 * @copyright Copyright &copy; 2008-2011 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace yii\util;

/**
 * VarDumper 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.
 *
 * VarDumper can be used as follows,
 * <pre>
 * VarDumper::dump($var);
 * </pre>
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
class VarDumper
{
	private static $_objects;
	private static $_output;
	private static $_depth;

	/**
	 * Displays a variable.
	 * This method achieves the similar functionality as var_dump and print_r
	 * but is more robust when handling complex objects such as Yii controllers.
	 * @param mixed $var variable to be dumped
	 * @param integer $depth maximum depth that the dumper should go into the variable. Defaults to 10.
	 * @param boolean $highlight whether the result should be syntax-highlighted
	 */
	public static function dump($var,$depth=10,$highlight=false)
	{
		echo self::dumpAsString($var,$depth,$highlight);
	}

	/**
	 * Dumps a variable in terms of a string.
	 * This method achieves the similar functionality as var_dump and print_r
	 * but is more robust when handling complex objects such as Yii controllers.
	 * @param mixed $var variable to be dumped
	 * @param integer $depth maximum depth that the dumper should go into the variable. Defaults to 10.
	 * @param boolean $highlight whether the result should be syntax-highlighted
	 * @return string the string representation of the variable
	 */
	public static function dumpAsString($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);
			self::$_output=preg_replace('/&lt;\\?php<br \\/>/','',$result,1);
		}
		return self::$_output;
	}

	/*
	 * @param mixed $var variable to be dumped
	 * @param integer $level depth level
	 */
	private static function dumpInternal($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::$_output.="'".addslashes($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 $key)
					{
						if(gettype($key)=='integer')
							$key2=$key;
						else
							$key2="'".str_replace("'","\\'",$key)."'";

						self::$_output.="\n".$spaces."    $key2 => ";
						self::$_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;
					$spaces=str_repeat(' ',$level*4);
					self::$_output.="$className#$id\n".$spaces.'(';
					foreach($members as $key=>$value)
					{
						$keyDisplay=strtr(trim($key),array("\0"=>':'));
						self::$_output.="\n".$spaces."    [$keyDisplay] => ";
						self::$_output.=self::dumpInternal($value,$level+1);
					}
					self::$_output.="\n".$spaces.')';
				}
				break;
		}
	}
}