Comments on: PHP Function To Get A File Extension From A String

By: Andrew Ensley

Andrew Ensley — Tue, 08 May 2012 16:51:39 +0000

I found this post from Google, and though “wow, what a simple answer.” I then read the comments suggesting alternative methods and gave those a try as well. They all work of course, but I wanted to know what worked *better*, so I benchmarked them. The following is how long it took my server to run each method 1 million times on the string: ‘/var/www/thisisatest.1.2.18.min.js’

Substr: 0.8037 seconds
Pathinfo: 1.95027 seconds
Explode: 2.35024 seconds

Clearly, the method you posted smoked the competition. I will be using it. Thank you for posting this!

By: Rajeev

Rajeev — Fri, 24 Feb 2012 09:37:22 +0000

I always prefer php code functions eg.

$file_extension=pathinfo($filename, PATHINFO_EXTENSION);

By: sudhir

sudhir — Thu, 05 Jan 2012 06:06:24 +0000

Thanks , IT is really very user full.

By: GotiBandhu

GotiBandhu — Fri, 30 Sep 2011 12:56:48 +0000

Hello Everyone,
In PHP, two function are available $_Get () and $_Post () for passing values from one page to another page, this functions are used to get the values which are passed from a user-filled form (User input value form), like user registration or login form etc…………………… for more details please check out the following link….
http://www.mindstick.com/Articles/7591b2ed-8eb3-4382-8e72-cd58767a7f29/?PHP $_Get Function

Thanks !!!!

By: wael fareed

wael fareed — Thu, 30 Jun 2011 15:48:46 +0000

// gif image uploaded
if (isset($_FILES['file'])) {
$file_extension =$_FILES['file']['extension'] ;
$extension = substr(“$file_extension”, 6); // remove the image/ and the gif extension remains.
echo $extension // return gif
}

By: beauty

beauty — Mon, 30 May 2011 17:00:17 +0000

There are many way to get file extension. For me, I use end(explode('.', $_FILES['fileupload']['name'])); I think this is easy to understand code from it.

By: DaveDisaster

DaveDisaster — Fri, 13 May 2011 17:11:40 +0000

I’ve run a bunch of microtime() tests, and almost every time pathinfo() is the fastest, by a healthy margin over end/explode. substr/strrchr seems to vary somewhere in the middle.

By: rafieldex

rafieldex — Tue, 21 Dec 2010 21:15:02 +0000

Oh come on…i wrote this post quickly.

function f_extension($fn){
$str=explode(‘/’,$fn);
$len=count($str);
if (strpos($str[($len-1)],’.') === False) return False; // Has not .
$str2=explode(‘.’,$str[($len-1)]);
$len2=count($str2);
$ext=$str2[($len2-1)];
return $ext;
}

By: sumit

sumit — Tue, 27 Apr 2010 13:19:13 +0000

end(explode(‘.’, “filename.ext));,
explain how does it work

By: sumit

sumit — Tue, 27 Apr 2010 13:17:30 +0000

@crivion: please explain it with example