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Most people are not used to HTML. So if you want to provide formatting option to your comment system or guest book, BBCode is the safest method. BBCode is supported by almost all Bulletin Boards, and Social Networking websites like Orkut. So most of the people are aware of how to use BBCode. Use the function below to add BBCode formatting to your script.
The first argument of the function is the string to be formatted. The second one is optional and setting it to true removes all HTML tags in the string. If it is made false, then the tags will be printed as is.
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<?php
function BBCodeFormat($str, $removeTags = FALSE){
$str = $removeTags ? strip_tags($str) : htmlentities($str);
$str = nl2br($str);
$pattern = array(
'/\[b\](.*?)\[\/b\]/is',
'/\[i\](.*?)\[\/i\]/is',
'/\[u\](.*?)\[\/u\]/is',
'/\[url\=(.*?)\](.*?)\[\/url\]/is',
'/\[url\](.*?)\[\/url\]/is',
'/\[align\=(left|center|right)\](.*?)\[\/align\]/is',
'/\[img\](.*?)\[\/img\]/is',
'/\[mail\=(.*?)\](.*?)\[\/mail\]/is',
'/\[mail\](.*?)\[\/mail\]/is',
'/\[font\=(.*?)\](.*?)\[\/font\]/is',
'/\[size\=(.*?)\](.*?)\[\/size\]/is',
'/\[color\=(.*?)\](.*?)\[\/color\]/is',
);
$replace = array(
'<strong>$1</strong>',
'<em>$1</em>',
'<u>$1</u>',
'<a href="$1">$2</a>',
'<a href="$1">$1</a>',
'<div style="text-align: $1;">$2</div>',
'<img src="$1" />',
'<a href="mailto:$1">$2</a>',
'<a href="mailto:$1">$1</a>',
'<span style="font-family: $1;">$2</span>',
'<span style="font-size: $1;">$2</span>',
'<span style="color: $1;">$2</span>',
);
// Replace Tags
$str = preg_replace ($pattern, $replace, $str);
// Replace Quotes
$open = '<blockquote>';
$close = '</blockquote>';
preg_match_all ('/\[quote\]/i', $str, $matches);
$opentags = count($matches['0']);
preg_match_all ('/\[\/quote\]/i', $str, $matches);
$closetags = count($matches['0']);
$unclosed = $opentags - $closetags;
for ($i = 0; $i < $unclosed; $i++)$str .= '</blockquote>';
$str = str_replace ('[quote]', $open, $str);
$str = str_replace ('[/' . 'quote]', $close, $str);
return $str;
}
?> | |
Example Usage
| <?php
$str = "My [color=red]name[/color] is [u][b]Gerhard[/b] [i]Gerome[/i][/u]";
echo BBCodeFormat($str);
?> | |
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