php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login
Bug #43872 preg_replace() returns blank string
Submitted: 2008-01-16 23:45 UTC Modified: 2008-01-17 19:18 UTC
From: floyd dot mcmichael at alaska dot gov Assigned:
Status: Closed Package: *Regular Expressions
PHP Version: 5.2.5 OS: windows
Private report: No CVE-ID: None
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If you forgot your password, you can retrieve your password here.
Password:
Status:
Package:
Bug Type:
Summary:
From: floyd dot mcmichael at alaska dot gov
New email:
PHP Version: OS:

 

 [2008-01-16 23:45 UTC] floyd dot mcmichael at alaska dot gov
Description:
------------
preg_replace blanks a string that it didn't use to in previous versions of PHP 5.x. other preg_replace strings not affected


Reproduce code:
---------------
function doSmiles($string, $skinname)
	{
	$patterns = array(
		"/\[alien\]/i",
		... snipped due to length ...
		"/\[crazy\]/i"
		);
	$replacements = array(
		"<img src=\"./skin/$skinname/emotes/alien.png\" alt=\"alien\" title=\"alien\">",
		... snip due to length ...
		"<img src=\"./skin/$skinname/emotes/crazy.png\" src=\"./skin/$skinname/emotes/crazy.png\" alt=\"crazy\" title=\"crazy\">"
		);

	$string = preg_replace($patterns, $replacements, $string);
	return $string;
	}


Expected result:
----------------
print substrings like [alien] to html-valid strings like <img src="./skin/default/alien.png">. prior to upgrading to 5.2.5 this particular function DID work. it no longer works.

Actual result:
--------------
returns a blank string ""

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2008-01-16 23:52 UTC] floyd dot mcmichael at alaska dot gov
EDIT:
"<img src=\"./skin/$skinname/emotes/crazy.png\"
src=\"./skin/$skinname/emotes/crazy.png\" alt=\"crazy\"
title=\"crazy\">"

should be "<img src=\"./skin/$skinname/emotes/crazy.png\" alt=\"crazy\"
title=\"crazy\">"

preg_last_error(); returns 0 NO_ERROR.
why is this function not working as expected?
 [2008-01-17 19:18 UTC] floyd dot mcmichael at alaska dot gov
reviewed preg_replace string again and realized two non-alphanumeric characters were not escaped. (specifically two "(" ) re-ran and now the preg_replace string works. this must have been a change in 5.2.5 but now that the ('s are escaped the function works properly.
 
PHP Copyright © 2001-2024 The PHP Group
All rights reserved.
Last updated: Sat Dec 07 22:01:27 2024 UTC