bbcode_create

(PECL bbcode >= 0.9.0)

bbcode_create — Create a BBCode Resource

Description

resource bbcode_create ([ array $bbcode_initial_tags = NULL ] )

This function returns a new BBCode Resource used to parse BBCode strings.

Parameters

bbcode_initial_tags

An associative array containing the tag names as keys and parameters required to correctly parse BBCode as their value. The following key/value pairs are supported:

flags optional - a flag set based on the BBCODE_FLAGS_* constants.
type required - an int indicating the type of tag. Use the BBCODE_TYPE_* constants.
open_tag required - the HTML replacement string for the open tag.
close_tag required - the HTML replacement string for the close tag.
default_arg optional - use this value as the default argument if none is provided and tag_type is of type OPTARG.
content_handling optional - Gives the callback used for modification of the content. Object Oriented Notation supported only since 0.10.1 callback prototype is string name(string $content, string $argument)
param_handling optional - Gives the callback used for modification of the argument. Object Oriented Notation supported only since 0.10.1 callback prototype is string name(string $content, string $argument)
childs optional - List of accepted children for the tag. The format of the list is a comma separated string. If the list starts with ! it will be the list of rejected children for the tag.
parent optional - List of accepted parents for the tag. The format of the list is a comma separated string.

Return Values

Returns a BBCode_Container

Examples

Example #1 bbcode_create() example


<?php
$arrayBBCode=array(
    ''=>         array('type'=>BBCODE_TYPE_ROOT,  'childs'=>'!i'),
    'i'=>        array('type'=>BBCODE_TYPE_NOARG, 'open_tag'=>'<i>',
                    'close_tag'=>'</i>', 'childs'=>'b'),
    'url'=>      array('type'=>BBCODE_TYPE_OPTARG,
                    'open_tag'=>'<a href="{PARAM}">', 'close_tag'=>'</a>',
                    'default_arg'=>'{CONTENT}',
                    'childs'=>'b,i'),
    'img'=>      array('type'=>BBCODE_TYPE_NOARG,
                    'open_tag'=>'<img src="', 'close_tag'=>'" />',
                    'childs'=>''),
    'b'=>        array('type'=>BBCODE_TYPE_NOARG, 'open_tag'=>'<b>',
                    'close_tag'=>'</b>'),
);
$text=<<<EOF
[b]Bold Text[/b]
[i]Italic Text[/i]
[url]http://www.php.net/[/url]
[url=http://pecl.php.net/][b]Content Text[/b][/url]
[img]http://static.php.net/www.php.net/images/php.gif[/img]
[url=http://www.php.net/]
[img]http://static.php.net/www.php.net/images/php.gif[/img]
[/url]
EOF;
$BBHandler=bbcode_create($arrayBBCode);
echo bbcode_parse($BBHandler,$text);
?>

The above example will output:

<b>Bold Text</b>
[i]Italic Text[/i]
<a href="http://www.php.net/">http://www.php.net/</a>
<a href="http://pecl.php.net/"><b>Content Text</b></a>
<img src="http://static.php.net/www.php.net/images/php.gif" />
<a href="http://www.php.net/">
[img]http://static.php.net/www.php.net/images/php.gif[/img]
</a>

User Contributed Notes

rothenbergxxx at gmail dot com

6 years ago


For those without the BBCode extension, here's a relatively elegant function to do the trick. 

Keep in mind that if you're using XHTML and one of your users tries to overlap lags <b>Like <i>so</b></i>, it will invalidate your markup. Still working on an expression for this. 



<?php 

    function bb_parse($string) {

        $tags = 'b|i|size|color|center|quote|url|img';

        while (preg_match_all('`\[('.$tags.')=?(.*?)\](.+?)\[/\1\]`', $string, $matches)) foreach ($matches[0] as $key => $match) {

            list($tag, $param, $innertext) = array($matches[1][$key], $matches[2][$key], $matches[3][$key]); 

            switch ($tag) { 

                case 'b': $replacement = "<strong>$innertext</strong>"; break; 

                case 'i': $replacement = "<em>$innertext</em>"; break; 

                case 'size': $replacement = "<span style=\"font-size: $param;\">$innertext</span>"; break; 

                case 'color': $replacement = "<span style=\"color: $param;\">$innertext</span>"; break; 

                case 'center': $replacement = "<div class=\"centered\">$innertext</div>"; break; 

                case 'quote': $replacement = "<blockquote>$innertext</blockquote>" . $param? "<cite>$param</cite>" : ''; break; 

                case 'url': $replacement = '<a href="' . ($param? $param : $innertext) . "\">$innertext</a>"; break; 

                case 'img': 

                    list($width, $height) = preg_split('`[Xx]`', $param); 

                    $replacement = "<img src=\"$innertext\" " . (is_numeric($width)? "width=\"$width\" " : '') . (is_numeric($height)? "height=\"$height\" " : '') . '/>'; 

                break; 

                case 'video': 

                    $videourl = parse_url($innertext); 

                    parse_str($videourl['query'], $videoquery); 

                    if (strpos($videourl['host'], 'youtube.com') !== FALSE) $replacement = '<embed src="http://www.youtube.com/v/' . $videoquery['v'] . '" type="application/x-shockwave-flash" width="425" height="344"></embed>'; 

                    if (strpos($videourl['host'], 'google.com') !== FALSE) $replacement = '<embed src="http://video.google.com/googleplayer.swf?docid=' . $videoquery['docid'] . '" width="400" height="326" type="application/x-shockwave-flash"></embed>'; 

                break; 

            } 

            $string = str_replace($match, $replacement, $string); 

        } 

        return $string; 

    } 

?>



[EDIT BY danbrown AT php DOT net: Contains a bugfix provided by (ramonvandam AT gmail DOT com) on 04-SEP-09 to address an improperly-defined parameter.  Also contains a bugfix provided by (pompei2 AT gmail DOT com) on 15-FEB-10 to address improperly-closed tags.  Plus, contains another bugfix provided by (angad AT wootify DOT com) on 18-JUL-2011 to fix an issue where unsupported tags provided to the function could cause the script to time out.]

void at php dot net

3 years ago


I strongly recommend checking out this code (pure php implementation of the c library) : 

If you can't install the pecl version, it avoids regexp and therefore is able to yield better results: 

http://svn.php.net/viewvc/pecl/bbcode/trunk/bbcode.php?view=co

Xavier.