為什麼回呼函數在array_filter()裡面沒有起作用？

array_filter() 回呼函數

 Horse [1] => Fido [2] => Cat ) print_r(array_map("myFunction",$a)); //Array ( [0] => Horse [1] => Dog [2] => Cat )//為什麼回呼函數在array_filter()裡面沒有起作用？print_r(array_filter($a,"myFunction")); ?>

回複討論(解決方案)

去看下array_filter 的用法就會明白

function myFunction($v)     {    if ($v==="Dog")        {            return true;        }            return false;    }    $a=array("Horse","Dog","Cat");    //Array ( [0] => Horse [1] => Fido [2] => Cat )     print_r(array_map("myFunction",$a));          //Array ( [0] => Horse [1] => Dog [2] => Cat )    //為什麼回呼函數在array_filter()裡面沒有起作用？    print_r(array_filter($a,"myFunction"));

明白了，謝謝兩位

