end(explode) Strict Standards: Only variables should be passed by reference in

Question

I have this code to get the extension of a file:

$extension = end(explode(".", $_FILES["rfile"]["name"]));

That is working fine on localhost, but when I upload online hosting, it is giving me this error:

Strict Standards: Only variables should be passed by reference in...

Answer 1

Why not use pathinfo (PHP >= 4.0.3), i.e.:

$ext = pathinfo($_FILES["rfile"]["name"])['extension'];

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Live PHP demo

http://ideone.com/eMpbnL

Answer 2

PHP end takes an reference to a variable as argument. http://php.net/manual/en/function.end.php

So, with strict standards enabled, you should put the result of explode into a variable first:

$exp = explode(".", $_FILES["rfile"]["name"])
$extension = end($exp);