How Do I Check If a String of Text Ends With '.PDF' Using PHP?

Question

I have a string of text called doc/document1.pdf. Is there PHP code I can use that will allow me to check if the last 4 characters are equal to '.pdf'?

I am looking for code that looks like this:

<?php if($stringoftext_lastfourcharacters == '.pdf') {

echo "This is a PDF";

}

?>

http://php.net/manual-lookup.php?pattern=EN%2Fref.strings.php&lang=en&scope=404quickref — Marc B, Jun 29 '15 at 20:20
if you want to know the file type. **Don't** use the extension use the mime type: http://php.net/manual/en/ref.fileinfo.php — , Jun 29 '15 at 20:25
@AbraCadaver yeah, saw this one too http://stackoverflow.com/a/7563688/ - more than one way to hit a barn door ;-) question here could be a dupe of. — Funk Forty Niner, Jun 29 '15 at 20:28

Jay Blanchard · Accepted Answer · 2015-06-29T20:30:03.047

9

Use substr() -

if(substr($myString, -4) == '.pdf')....

Or use pathinfo() -

$info = pathinfo($myString);
if ($info["extension"] == "pdf") ....

You can also use explode() -

$myStringParts = explode('.', $myString);
if($myString[count($myStringParts) - 1] == 'pdf')....

edited Jun 29 '15 at 20:30

answered Jun 29 '15 at 20:21

Jay Blanchard

34,243
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3

You could wrap the substr in `strtolower()` in order to return true if the file is upper case. – Jerbot Jun 29 '15 at 20:23

danleyb2 · Answer 2 · 2015-06-29T21:02:49.567

3

Regex way

$reg="/\.pdf$/i";
$text= "doc/document1.pdf";
if(preg_match($reg,$text, $output_array)) { echo "This is a pdf";}

edited Jun 29 '15 at 21:02

answered Jun 29 '15 at 20:57

danleyb2

988
12
18

score 2 · Answer 3 · edited Jun 29 '15 at 20:27

2

if(substr($str,strlen($str)-3)==="pdf") {...}

edited Jun 29 '15 at 20:27

Jay Blanchard

34,243
16
77
119

answered Jun 29 '15 at 20:23

wind

21
2

How Do I Check If a String of Text Ends With '.PDF' Using PHP?

3 Answers3