<?php
// Just an example ... :P :D ;)
// [center]Centered text[/center]
$s = preg_replace("/\[center\]((\s|.)+?)\[\/center\]/i", "<center>\\1</center>", $s);
// [list]List[/list]
$s = preg_replace("/\[list\]((\s|.)+?)\[\/list\]/", "<ul>\\1</ul>", $s);
// [list=disc|circle|square]List[/list]
$s = preg_replace("/\[list=(disc|circle|square)\]((\s|.)+?)\[\/list\]/", "<ul type=\"\\1\">\\2</ul>", $s);
// [list=1|a|A|i|I]List[/list]
$s = preg_replace("/\[list=(1|a|A|i|I)\]((\s|.)+?)\[\/list\]/", "<ol type=\"\\1\">\\2</ol>", $s);
// [*]
$s = preg_replace("/\[\*\]/", "<li>", $s);
// Bold
$s = preg_replace("/\[b\]((\s|.)+?)\[\/b\]/", "<b>\\1</b>", $s);
// Italic
$s = preg_replace("/\[i\]((\s|.)+?)\[\/i\]/", "<i>\\1</i>", $s);
// Underline
$s = preg_replace("/\[u\]((\s|.)+?)\[\/u\]/", "<u>\\1</u>", $s);
// [color=blue]Text[/color]
$s = preg_replace("/\[color=([a-zA-Z]+)\]((\s|.)+?)\[\/color\]/i",
"<font color=\\1>\\2</font>", $s);
// [color=#ffcc99]Text[/color]
$s = preg_replace("/\[color=(#[a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9])\]((\s|.)+?)\[\/color\]/i",
"<font color=\\1>\\2</font>", $s);
// [size=4]Text[/size]
$s = preg_replace("/\[size=([1-7])\]((\s|.)+?)\[\/size\]/i",
"<font size=\\1>\\2</font>", $s);
// [pre]Preformatted[/pre]
$s = preg_replace("/\[pre\]((\s|.)+?)\[\/pre\]/i", "<tt><nobr>\\1</nobr></tt>", $s);
// Maintain spacing
$s = str_replace(" ", " ", $s);
?> | 
