Online PHP editor | output for 3rj1g

@ 2017-07-03T09:55:15Z

<?php

function getExt($filename) {

 //   if(!is_file($filename)) return '';
    $n = strlen($filename);
   // if($n<2) return '';
    $non_ext = '';
    $ext = '';
    for($i=$n;$i--;$i>=1) {
        $c = $filename[$i];
        if($c==='.') {
            $ext = '.'.$non_ext.$ext;
            $non_ext = '';
        }else
            $non_ext = $c.$non_ext;
    }
    return $ext;
}
$filename = "asdfasdfasd.tar.gz";
$ext = getExt($filename);
var_dump($ext);

Var_dump(explode(".", $filename, 2)[1]);

Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: string(7) ".tar.gz" string(6) "tar.gz"
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 string(7) ".tar.gz" string(6) "tar.gz"

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