<?php

/* Simple PHP BBCode Parser function */

//BBCode Parser function

function showBBcodes($text) {

// BBcode array
$find = array(
'~\[b\](.*?)\[/b\]~s',
'~\[i\](.*?)\[/i\]~s',
'~\[u\](.*?)\[/u\]~s',
'~\[quote\](.*?)\[/quote\]~s',
'~\[size=(.*?)\](.*?)\[/size\]~s',
'~\[color=(.*?)\](.*?)\[/color\]~s',
'~\[url\]((?:ftp|https?)://.*?)\[/url\]~s',
'~\[img\](https?://.*?\.(?:jpg|jpeg|gif|png|bmp))\[/img\]~s'
);

// HTML tags to replace BBcode
$replace = array(
'<b>$1</b>',
'<i>$1</i>',
'<span style="text-decoration:underline;">$1</span>',
'<pre>$1</'.'pre>',
'<span style="font-size:$1px;">$2</span>',
'<span style="color:$1;">$2</span>',
'<a href="$1">$1</a>',
'<img src="$1" alt="" />'
);

// Replacing the BBcodes with corresponding HTML tags
return preg_replace($find,$replace,$text);
}

// How to use the above function:

$bbtext = "This is [b]bold[/b] and this is [u]underlined[/u] and this is in [i]italics[/i] with a [color=red] red color[/color]";
$htmltext = showBBcodes($bbtext);
echo $htmltext;

?>