Menu
Community /Pin to ProfileBookmark
@NogDogJun 05.2005 — #Possibly (but my mind swims sometimes when I try to wrangle with some of this, so no guarantees) using a "look-behind" assertion looking for an opening "<" with any number of characters that are not ">" preceding the search text:
@NogDogJun 05.2005 — #[b](?<=[/b] is a positive look-behind assertion while [b](?<![/b] is a negative look-behind assertion. (An assertion is used to help determine what matches, but is not included within the actual match.) However, testing indicates that look-behind assertions must be of fixed length, so we need to use a look-ahead assertion instead ([b](?=[/b] for positive and [b](?![/b] for negative). I just ran this test, and it worked fine:
@NogDogJun 06.2005 — #
You're welcome. I actually sort of enjoyed that problem - once I got past the aggravation of not understanding the documentation the first 2 or 3 times I read it. :rolleyes: It felt good when my test script actually worked. ?
preg_replace() avoiding html tags in subject string. Clearly I’m a simpleton.
Hi folks, got a [b]very
All I wan’t is to do a bog standard preg_replace on a subject string, but for it not to effect any of the actual html tags that might be in there. I want it to be able to effect the contents of tags (like the text inside of a paragraph element) and text on the outside of an element, but just not actually effect the tags themselves (or their attributes).
Any ideas folks? I’ve been trying for two days solid now and have run out of ideas. Oh and using the DOM API isn’t an option. Whilst it would be the ideal solution to such a simple task, PHP5 doesn’t have one yet (so much for OOP eh).
Sign in
to post a comment7 Comments(s) ↴
0
@NogDogJun 05.2005 — #Possibly (but my mind swims sometimes when I try to wrangle with some of this, so no guarantees) using a "look-behind" assertion looking for an opening "<" with any number of characters that are not ">" preceding the search text:[code=php]
preg_replace('/(?<!<[^>]*)'.$string.'/', $replacement);
[/code]0
@NogDogJun 05.2005 — #[b](?<=[/b] is a positive look-behind assertion while [b](?<![/b] is a negative look-behind assertion. (An assertion is used to help determine what matches, but is not included within the actual match.) However, testing indicates that look-behind assertions must be of fixed length, so we need to use a look-ahead assertion instead ([b](?=[/b] for positive and [b](?![/b] for negative). I just ran this test, and it worked fine:[code=php]
<?php
$test = "<p class=test>This is a test. It is <span id='test'>only a test</span>.</p>";
$search = "test";
$replace = "experiment";
$result = preg_replace('/'.$search.'(?![^<]*>)/', $replace, $test);
echo htmlentities($result);
?>
[/code]0
@NogDogJun 06.2005 — #Nog..... You are without doubt the greatest dog ever to bless this planet with your presence. Thankyou very much.[/QUOTE]
You're welcome. I actually sort of enjoyed that problem - once I got past the aggravation of not understanding the documentation the first 2 or 3 times I read it. :rolleyes: It felt good when my test script actually worked. ?