这个php类可以用来解析BBCode代码,并将其转换成HTML。

它会搜索并替换UBB标签与等价的HTML标记给定的文本字符串。

类不仅支持块和内嵌文本格式,而且还支持嵌入视频链接。

解析BBCode代码类:

<?php
//http://www.codepearl.com
##########################################
#            BBCode parser 1.0
# Description:    Convert BBCode style text to html
# Developed by:   Ramunas Pilotas
# Email:          woolfas@gmail.com
# Licence:        GLP
##########################################

// Warning:
//   Although this class should not have unexpected results, the use of this
//   class is at the risk of the user. The author can not be responsible
//   if any damage is caused by this class.

class BBCode {

private static $simple_search = array(
'/\[b\](.*?)\[\/b\]/is',
'/\[i\](.*?)\[\/i\]/is',
'/\[u\](.*?)\[\/u\]/is',
'/\[s\](.*?)\[\/s\]/is',
'/\[size\=(.*?)\](.*?)\[\/size\]/is',
'/\[color\=(.*?)\](.*?)\[\/color\]/is',
'/\[center\](.*?)\[\/center\]/is',
'/\[font\=(.*?)\](.*?)\[\/font\]/is',
'/\[align\=(left|center|right)\](.*?)\[\/align\]/is',

'/\[url\](.*?)\[\/url\]/is',
'/\[url\=(.*?)\](.*?)\[\/url\]/is',
'/\[mail\=(.*?)\](.*?)\[\/mail\]/is',
'/\[mail\](.*?)\[\/mail\]/is',
'/\[img\](.*?)\[\/img\]/is',
'/\[img\=(\d*?)x(\d*?)\](.*?)\[\/img\]/is',
'/\[img (.*?)\](.*?)\[\/img\]/ise',

'/\[quote\](.*?)\[\/quote\]/is',
'/\[quote\=(.*?)\](.*?)\[\/quote\]/is',
'/\[code\](.*?)\[\/code\]/is',

'/\[sub\](.*?)\[\/sub\]/is',
'/\[sup\](.*?)\[\/sup\]/is',
'/\[p\](.*?)\[\/p\]/is',

"/\[youtube\](.*?)\[\/youtube\]/i",
"/\[youku\](.*?)\[\/youku\]/i",
"/\[gvideo\](.*?)\[\/gvideo\]/i",

// "Specials", XHTML-like BBC Repository
'/\[bull \/\]/i',
'/\[copyright \/\]/i',
'/\[registered \/\]/i',
'/\[tm \/\]/i',
);

private static $simple_replace = array(
'<strong>$1</strong>',
'<em>$1</em>',
'<u>$1</u>',          // you can also use: '<span style="text-decoration: underline;">$1</span>'
'<del>$1</del>',      // you can also use: '<span style="text-decoration: line-through;">$1</span>'
'<span style="font-size: $1;">$2</span>',
'<span style="color: $1;">$2</span>',
'<div style="text-align: center;">$1</div>',
'<span style="font-family: $1;">$2</span>',
'<div style="text-align: $1;">$2</div>',

'<a href="$1">$1</a>',
'<a href="$1">$2</a>',
'<a href="mailto:$1">$2</a>',
'<a href="mailto:$1">$1</a>',
'<img src="$1" alt="" />',
'<img height="$2" width="$1" alt="" src="$3" />',
'"<img " . str_replace("&#039;", "\"",str_replace("&quot;", "\"", "$1")) . " src=\"$2\" />"',   // we replace &quot; and &#039; to " in case if we got string converted to html entities

'<blockquote>$1</blockquote>',                              // you can also use: '<div>$1</div>'
'<blockquote><strong>$1 wrote:</strong> $2</blockquote>',   // you can also use: '<div><strong>$1 wrote:</strong> $2</div>
'<pre>$1</pre>',

'<sub>$1</sub>',
'<sup>$1</sup>',
'<p>$1</p>',

"<object width=\"425\" height=\"350\"><embed src=\"http://www.youtube.com/v/$1\" type=\"application/x-shockwave-flash\" width=\"425\" height=\"350\"></embed></object>",
"<object width=\"425\" height=\"350\"><embed src=\"http://player.youku.com/player.php/sid/$1/v.swf\" type=\"application/x-shockwave-flash\" width=\"425\" height=\"350\"></embed></object>",
"<embed src=\"http://player.youku.com/player.php/sid/$1/v.swf\" type=\"application/x-shockwave-flash\" style=\"width: 425px; height: 350px;\">",

// "Specials", XHTML-like BBC Repository
'&bull;',
'&copy;',
'&reg;',
'&trade;',
);

private static $lineBreaks_search = array(
// [list]
//'/\<br \/\>\s*\[list(.*?)\]/i',     // uncomment to remove <br /> before the tag
'/\[list(.*?)\](.+?)\[\/list\]/sie',
'/\[\/list\]\s*\<br \/\>/i',

// [code]
//'/\<br \/\>\s*\[code\]/i',          // uncomment to remove <br /> before the tag
'/\[code\](.+?)\[\/code\]/sie',
'/\[\/code\]\s*\<br \/\>/i',

// [quote]
//'/\<br \/\>\s*\[quote(.*?)\]/i',    // uncomment to remove <br /> before the tag
'/\[\/quote\]\s*\<br \/\>/i',

// [p]
//'/\<br \/\>\s*\[p\]/i',             // uncomment to remove <br /> before the tag
'/\[\/p\]\s*\<br \/\>/i',

// [center]
//'/\<br \/\>\s*\[center\]/i',        // uncomment to remove <br /> before the tag
'/\[\/center\]\s*\<br \/\>/i',

// [align]
//'/\<br \/\>\s*\[align(.*?)\]/i',    // uncomment to remove <br /> before the tag
'/\[\/align\]\s*\<br \/\>/i',
);

private static $lineBreaks_replace = array(
// [list]
//"\n[list$1]",         // uncomment to remove <br /> before the tag
"'[list$1]'.str_replace('<br />', '', '$2').'[/list]'",
"[/list]",

// [code]
//"\n[code]",           // uncomment to remove <br /> before the tag
"'[code]'.str_replace('<br />', '', '$1').'[/code]'",
"[/code]",

// [quote]
//"\n[quote$1]",        // uncomment to remove <br /> before the tag
"[/quote]",

// [p]
//"\n[p]",              // uncomment to remove <br /> before the tag
"[/p]",

// [center]
//"\n[center]",         // uncomment to remove <br /> before the tag
"[/center]",

// [align]
//"\n[align$1]",        // uncomment to remove <br /> before the tag
"[/align]",
);

private static function process_list_items($list_items) {
$result_list_items = array();

// Check for [li][/li] tags
preg_match_all("/\[li\](.*?)\[\/li\]/is", $list_items, $li_array);
$li_array = $li_array[1];

if (empty($li_array)) {
// we didn't find any [li] tags
$list_items_array = explode("[*]", $list_items);
foreach ($list_items_array as $li_text) {
$li_text = trim($li_text);
if (empty($li_text)) {
continue;
}
$li_text = nl2br($li_text);
$result_list_items[] = '<li>'.$li_text.'</li>';
}
} else {
// we found [li] tags!
foreach ($li_array as $li_text) {
$li_text = nl2br($li_text);
$result_list_items[] = '<li>'.$li_text.'</li>';
}
}

$list_items = implode("\n", $result_list_items);

return $list_items;
}

/*
ARGUMENTS :
$string = the text you want to format
*/
/*
It is recomended to do $string = htmlentities($string) before calling parse
*/
public static function parse($string) {

$s = (string) $string;

if (empty($s)) {
return '';
}

// Preappend http:// to url address if not present
$s = preg_replace('/\[url\=([^(http)].+?)\](.*?)\[\/url\]/i', '[url=http://$1]$2[/url]', $s);
$s = preg_replace('/\[url\]([^(http)].+?)\[\/url\]/i', '[url=http://$1]$1[/url]', $s);

// Add line breaks
$s = nl2br($s);

// Remove the trash made by previous
$s = preg_replace(self::$lineBreaks_search, self::$lineBreaks_replace, $s);

// Parse bbcode
$s = preg_replace(self::$simple_search, self::$simple_replace, $s);

// Parse [list] tags
$s = preg_replace('/\[list\](.*?)\[\/list\]/sie', '"<ul>\n".self::process_list_items("$1")."\n</ul>"', $s);
$s = preg_replace('/\[list\=(disc|circle|square|decimal|decimal-leading-zero|lower-roman|upper-roman|lower-greek|lower-alpha|lower-latin|upper-alpha|upper-latin|hebrew|armenian|georgian|cjk-ideographic|hiragana|katakana|hiragana-iroha|katakana-iroha|none)\](.*?)\[\/list\]/sie',
'"<ol style=\"list-style-type: $1;\">\n".self::process_list_items("$2")."\n</ol>"', $s);

return $s;
}

}

PHP示例代码:

<?php
//http://www.codepearl.com
include "BBCode.class.php";

$bbtext = <<<BBTEXT
[b]bold[/b]
[i]italic[/i]
[u]underline[/u]
[s]strike through[/s]
[size=25px]size 25px[/size]
[color=red]color red[/color]
[center]center text[/center]
[font=monospace]monospace[/font]
[align=right]align right[/align]
Links:
[url]http://www.bbcode.org/[/url]
[url=http://www.bbcode.org/]Linking to a named site[/url]
[url]www.bbcode.org/[/url]
[url=www.bbcode.org/]Linking to a named site (no http)[/url]
[mail=mail@to.you]Mail to you[/mail]
[mail]mail@to.you[/mail]

[bull /][copyright /][registered /][tm /]

[img]http://www.bbcode.org/images/lubeck_small.jpg[/img]
Resized image:
[img=100x50]http://www.bbcode.org/images/lubeck_small.jpg[/img]
Clickable image:
[url=http://www.bbcode.org/images/lubeck.jpg][img]http://www.bbcode.org/images/lubeck_small.jpg[/img][/url]
Resized image with meta information:
[img width="100" height="50" alt="Lubeck city gate" title="This is one of the medieval city gates of Lubeck"]http://www.bbcode.org/images/lubeck_small.jpg[/img]

[quote]quote[/quote]
[quote=Quote]quote[/quote]
[code]
preformatted text
preformatted text
preformatted text
[/code]

Unordered list
[list]
[*]unordered item 1
[*]unordered item 2
[/list]

Ordered list
[list=decimal]
[*]Item1
[*]item2
[/list]

Another ordered list
[list=upper-roman]
[li]List item 1[/li]
[li]List item 2[/li]
[/list]

Normal text. [sub]subscript[/sub]
Normal text. [sup]superscript[/sup]
[p]paragraph[/p]

Youku video
[youku]XMTU2NTA3MDAxMg==[/youku]

Good video
[gvideo]XMTU2NTA3MDAxMg==[/gvideo]

BBTEXT;

echo BBCode::parse($bbtext);

//the output is:
/*
<strong>bold</strong><br />
<em>italic</em><br />
<u>underline</u><br />
<del>strike through</del><br />
<span style="font-size: 25px;">size 25px</span><br />
<span style="color: red;">color red</span><br />
<div style="text-align: center;">center text</div>
<span style="font-family: monospace;">monospace</span><br />
<div style="text-align: right;">align right</div>

Links:<br />
<a href="http://www.bbcode.org/">http://www.bbcode.org/</a><br />
<a href="http://www.bbcode.org/">Linking to a named site</a><br />
<a href="http://www.bbcode.org/">www.bbcode.org/</a><br />
<a href="http://www.bbcode.org/">Linking to a named site (no http)</a><br />
<a href="mailto:mail@to.you">Mail to you</a><br />
<a href="mailto:mail@to.you">mail@to.you</a><br />
<br />
&bull;&copy;&reg;&trade;<br />
<br />

<img src="http://www.bbcode.org/images/lubeck_small.jpg" alt="" /><br />
Resized image:<br />
<img height="50" width="100" alt="" src="http://www.bbcode.org/images/lubeck_small.jpg" /><br />
Clickable image:<br />
<a href="http://www.bbcode.org/images/lubeck.jpg"><img src="http://www.bbcode.org/images/lubeck_small.jpg" alt="" /></a><br />
Resized image with meta information:<br />
<img width="100" height="50" alt="Lubeck city gate" title="This is one of the medieval city gates of Lubeck" src="http://www.bbcode.org/images/lubeck_small.jpg" /><br />
<br />
<blockquote>quote</blockquote>
<blockquote><strong>Quote wrote:</strong> quote</blockquote>

<pre>
preformatted text
preformatted text
preformatted text
</pre>
<br />
Unordered list<br />
<ul>
<li>unordered item 1</li>
<li>unordered item 2</li>
</ul>
<br />
Ordered list<br />
<ol style="list-style-type: decimal;">
<li>Item1</li>

<li>item2</li>
</ol>
<br />
Another ordered list<br />
<ol style="list-style-type: upper-roman;">
<li>List item 1</li>
<li>List item 2</li>
</ol>
<br />
Normal text. <sub>subscript</sub><br />
Normal text. <sup>superscript</sup><br />

<p>paragraph</p>
Youtube video<br />
<object width="425" height="350"><embed src="http://www.youtube.com/v/uelHwf8o7_U" type="application/x-shockwave-flash" width="425" height="350"></embed></object><br />
Google video<br />
<embed src="http://video.google.com/googleplayer.swf?docId=3425879595449788861" type="application/x-shockwave-flash" style="width: 425px; height: 350px;"><br />
<br />
*/

?>

得到的效果如下:

bold

italic

underline

strike through

size 25px

color red

center text

monospace

align right

Links:

http://www.bbcode.org/

Linking to a named site

www.bbcode.org/

Linking to a named site (no http)

Mail to you

mail@to.you

•©®™

Resized image:

Clickable image:

Resized image with meta information:

Lubeck city gate

quote

Quote wrote: quote

preformatted text
   preformatted text
      preformatted text

Unordered list

  • unordered item 1
  • unordered item 2

Ordered list

  1. Item1
  2. item2

Another ordered list

  1. List item 1
  2. List item 2

Normal text. subscript

Normal text. superscript

paragraph
Youku video

Good video