How to remove a substring from a string using PHP?

Question

Given the following string

http://thedude.com/05/simons-cat-and-frog-100x100.jpg

I would like to use substr or trim (or whatever you find more appropriate) to return this

http://thedude.com/05/simons-cat-and-frog.jpg

that is, to remove the -100x100. All images I need will have that tagged to the end of the filename, immediately before the extension.

There appears to be responses for this on SO re Ruby and Python but not PHP/specific to my needs.

How to remove the left part of a string?

Remove n characters from a start of a string

Remove substring from the string

Any suggestions?

Do you plan on hardcoding the value of the substring? Or do you want to match any -WIDTHxHEIGHT.ext form of substring? — Mihai Stancu
– Mihai Stancu, Commented May 27, 2012 at 2:38
Would you mind linking to the Ruby and Python versions you found? The techniques used there are probably relevant. — Ry-
– Ry- ♦, Commented May 27, 2012 at 2:40

Sampson · Accepted Answer · 2012-05-27 02:41:41Z

27

If you want to match any width/height values:

  $path = "http://thedude.com/05/simons-cat-and-frog-100x100.jpg";

  // http://thedude.com/05/simons-cat-and-frog.jpg
  echo preg_replace( "/-\d+x\d+/", "", $path );

Demo: http://codepad.org/cnKum1kd

The pattern used is pretty basic:

/     Denotes the start of the pattern
-     Literal - character
\d+   A digit, 1 or more times
x     Literal x character
\d+   A digit, 1 or more times
/     Denotes the end of the pattern

answered May 27, 2012 at 2:41

Sampson

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1 Comment

pepe Over a year ago

after all is said and done, this may be the versatile solution, in case these thumbnails end up changing in size

WojtekT · Accepted Answer · 2012-05-27 02:38:00Z

23

$url = "http://thedude.com/05/simons-cat-and-frog-100x100.jpg";
$new_url = str_replace("-100x100","",$url);

answered May 27, 2012 at 2:38

WojtekT

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Comments

flowfree · Accepted Answer · 2012-05-27 02:46:31Z

10

$url = str_replace("-100x100.jpg", '.jpg', $url);

Use -100x100.jpg for bullet-proof solution.

answered May 27, 2012 at 2:46

flowfree

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1 Comment

Mihai Stancu Over a year ago

But he needs the extension to remain, so add '.jpg' as the replacement value

Norse · Accepted Answer · 2012-05-27 02:38:00Z

3

If -100x100 are the only characters you're trying to remove from all of your strings, why not use str_replace?

$url = "http://thedude.com/05/simons-cat-and-frog-100x100.jpg";
str_replace("-100x100", "", $url);

answered May 27, 2012 at 2:38

Norse

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