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How would I get the value of a part of a string?

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Jul 03.2010

I have a blog. After someone makes a post, I want to be able to get all the links in the post, alter them, and put them back. How would I do that?

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PHP

11 Comments(s) ↴

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@MindzaiJul 03.2010 — I would use the DomDocument class.
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@narutodude000authorJul 03.2010 — I was thinking maybe regex?
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@YelgnidrocJul 03.2010 — I'd say regex
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@MindzaiJul 04.2010 — Why would you use regex when DomDocument is purpose built for exactly this kind of task? There are just too many variables involved with matching HTML tags.
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@YelgnidrocJul 04.2010 — There are just too many variables involved with matching HTML tags.[/QUOTE]

Where did html tags come from?

OP was about links (hyperlinks I assume)
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@MindzaiJul 04.2010 — ... and how does one create a hyperlink in a web document if not with the HTML anchor tag?
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@narutodude000authorJul 04.2010 — I will be using anchors
[CODE]<a href="...">...</a>[/CODE]
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@narutodude000authorJul 05.2010 — How can I use Regex? I know it's using Regex, but how?
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@criterion9Jul 05.2010 — I know it's using Regex, but how?[/quote]
Why would you bother with a regex based on the previous answer by Mindzai?
Why would you use regex when DomDocument is purpose built for exactly this kind of task? There are just too many variables involved with matching HTML tags.[/QUOTE]
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@YelgnidrocJul 05.2010 — If you want to use RegEx, take a look at:

http://uk3.php.net/manual/en/function.preg-replace.php


Or, for the DomDocument (which is probably the better option):

http://uk.php.net/manual/en/class.domdocument.php
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@sohguanhJul 06.2010 — If you want to use RegEx, take a look at:

http://uk3.php.net/manual/en/function.preg-replace.php


Or, for the DomDocument (which is probably the better option):

http://uk.php.net/manual/en/class.domdocument.php[/QUOTE]

I agree. Depending on the problem, we should choose the best fit. In this case I also prefer DomDocument since it is a HTML document.

Regex can be used in say a non-HTML document, unstructured text (aka free-text) document etc scenarios.
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