PHP replace BBcode tags

Question

I'm working on creating a bulletin board converter. I need PHP to replace/restructure the following from:

[img alt="" src="IMAGE LINK, NOT ENDING IN AN IMAGE FORMAT EXTENSION" style="max-width:100%;"]

To:

[img]IMAGE LINK[/img]

Where everything else such as the alt tags can be deleted.

At the moment I have PHP use preg_replace (in an array) and I am using regex to try and obtain the link. However I'm struggling on finding a way to convert it over, as I've not used regex before.

Apologies for the hassle, and thank you very much! :)

What do you mean with: NOT ENDING IN AN IMAGE FORMAT EXTENSION? Couldd you give some examples and expected result for all of them? — Toto
– Toto, Commented May 5, 2014 at 11:00

melvin · Accepted Answer · 2014-05-05 08:47:34Z

3

I guess you will need something like this

<?php
$string = '[img alt="" src="IMAGE LINK, NOT ENDING IN AN IMAGE FORMAT EXTENSION" style="max-width:100%;"]';

$matches = array();
print preg_replace('|\[img.*src="(.*)" style.*]|', '[img]$1[/img]', $string);

prints

[img]IMAGE LINK, NOT ENDING IN AN IMAGE FORMAT EXTENSION[/img]

answered May 5, 2014 at 8:47

melvin

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Comments

Hans Schindler · Accepted Answer · 2014-05-05 10:39:54Z

1

For your regex this is cleaner

\[img[^\]]+?src="([^"]*)"[^\]]*\]

Replacement is the same you had.

You need the ? for laziness otherwise you will have unexpected matches For instance the first answer regex matches [img src="img1" style] [img 2] [img 3] not what you want

answered May 5, 2014 at 10:39

Hans Schindler

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