PHP实现删除一维数组中某一个值

实现过程 

array_merge(array_diff(源数组, 要删除参数));

";
    print_r($list);
    echo "
";
    $temp = '857';
    $arr = array_merge(array_diff($list, array($temp)));
    echo "
";
    print_r($arr);
 
  
实现效果