在数组中查找值[关闭]

Question

What I am doing wrong with the following code? I want to compare if the element $my_id is present within the array $arr. If it is present return TRUE else return FALSE.

for($i=0;$i<$cnt;$i++)
{
    if($arr[$i] == $my_id)
    {
        return TRUE;
    }
    else
    {
        return FALSE;
    }
}

Answer 1

You could replace that with...

return in_array($my_id, $arr);

...assuming you don't really want to return FALSE if the first element does not match.

If that is actually what you wanted, you could use...

return $arr[0] == $my_id;

If you want to leave your code mostly intact, just move the return FALSE to outside of the loop body.