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Preg Replace help

2:40 am on Jun 29, 2010 (gmt 0)

Junior Member

10+ Year Member

joined:June 30, 2009
votes: 0

Hi all,

I'm stuck on something involving preg_replace. I'm using it to create BBCode on my site. I have a code tag which I use to show how to use the BBCode, but the bbcode inside the code bbcode tags still renders as html.

The code is as follows:
$pattern[0] = "#\[code\](.+?)\[/code\]#is";
$pattern[1] = "#\[info\](.+?)\[/info\]#is";

$replacements[0] = '<pre class="code">$1</pre>';
$replacements[1] = '<div class="informationbox">$1</div>';

$p = preg_replace($pattern, $replacements, $post);

I think I have to change $pattern[1] so it will not change if it is between the code tags. Though I'm hoping it's possible to do that in the code regexp as i have more bbcode than shown here.

Does anyone know how I can about this?

Thanks in advance,
6:14 pm on June 29, 2010 (gmt 0)

Senior Member

WebmasterWorld Senior Member 5+ Year Member

joined:Dec 13, 2009
votes: 0

Might be best to convert all square brackets to their html entity counterpart inside the "escape" tags first, and remove the escape tags. Then run the main part of the BB code script, like so:
while(preg_match('/\[esc\](.*?)\[\/esc\]/im', $input, $out)) {
$repl = str_replace('[', '&#91;', $out[1]);
$repl = str_replace(']', '&#93;', $repl);
$input = str_replace($out[0], $repl, $input);
unset($repl, $out);
Note: I suggest using an escape tag, so people can still parse BB code inside of your code tags.