array_walk用法示例

$words=array("l"=>"lemon","o"=>"orange","b"=>"banana","a"=>"apple"); 
//定义一个回调函数，输出数组元素 
function words_print($value,$key,$prefix){ 
	echo "$prefix:$key=>$value
\n"; 
} 
//定义一个回调函数直接改变元素的值 
function words_alter(&$value,$key){ 
	$value=ucfirst($value); 
	$key=strtoupper(key); 
} 
//输出元素的值 
array_walk($words,'words_print','words'); 
//改变元素的值 
array_walk($words,'words_alter'); 
echo "
"; 
print_r($words); 
echo "
"; 

类内部调用示例

class ArrayWalk {

	/**
	* properties:
	*/
	var $body_chunk = array('0'=>'Dewen', '1'=>'PHP', 2=>'Linux');


	/////////////////////////////////////////////////
	// VARIABLE METHODS
	/////////////////////////////////////////////////

	function ArrayWalk (){

	}

	function func_1(){

	print_r($this->body_chunk);
	array_walk ($this->body_chunk, array($this,'SpellStrToLower'));
	print_r($this->body_chunk);
	}

	function SpellStrToLower (&$str){
		$str = strtolower ($str);
	}

}


$obj = new ArrayWalk();
echo '
';
$obj->func_1();
echo '
';