PHP:数组操作函数array_count_values()的实现

<?php//统计数组中数据出现的频率	function  mycount($arr)	{		if(is_array($arr))		{			$values = array_values($arr); //取得数组中数值						$count = array();//初始化数组									foreach ($values as $value)			{				if(!array_key_exists($value,$count))				{					//如果键不存在则创建关联键					$temp = array($value=>0);					//连接两个数组实际上相当于往里面添加元素					$count=array_merge($count,$temp);									}			}			foreach ($values as $key)			{				$count[$key]++;			}			return $count;		}		return  $arr;	}	$a = array("ABC","FUCKYOU","ABC","Dady","PO","Dady","LIN","ABC","LIN","FUCKYOU");	$a = mycount($a);	print_r($a);	?>