Question

I have made a function that so far seems to be really good at getting the file extension no matter how strange the file name is. Every method I have come across on the net seems to like using explode on the . to get the extension, but what if the file name has multiple .s in it?

Here is my function:

$fileName = 'my.reallyAwk-ward..file--name.JPEG' ;
echo getExtension($fileName) ;

function getExtension($fileName)
{
    $ext = explode('.', strrev($fileName), 2) ;
    $ext = strtolower(strrev($ext[0])) ;
    return $ext ;
}

Am I reinventing a wheel or can this be made more efficient?

Answer 1

<?php
$path_parts = pathinfo('/www/htdocs/inc/lib.inc.php');

echo $path_parts['dirname'], "\n";
echo $path_parts['basename'], "\n";
echo $path_parts['extension'], "\n";
echo $path_parts['filename'], "\n"; // since PHP 5.2.0
?>

From http://php.net/manual/en/function.pathinfo.php