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BBCode w PHP

Zapewne wielu z Was zastanawia się jak dodać tagi BBCode do swoich księg gości, for etc. Otóż jest to bardzo proste i wystarczy tylko kilka linijek kodu. Wszystko będzie się operać na preg_replace

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$tresc=str_replace(" ", '&nbsp ', nl2br(htmlspecialchars($tresc)));
$tresc=preg_replace("#\[u\](.*?)\[/u\]#si", "\\1", $tresc);
$tresc=preg_replace("#\[img\](.*?)\[/img\]#si", "<img src='\\1' border='0' alt='obrazek' />", $tresc);
$tresc=preg_replace("#\[url=(.*?)\](.*?)\[/url\]#si", "<a href='\\1'>\\2</a>", $tresc);
$tresc=preg_replace("#\[b\](.*?)\[/b\]#si", "\\1", $tresc);
$tresc=preg_replace("#\[i\](.*?)\[/i\]#si", "\\1", $tresc);
$tresc=preg_replace("#\[color=(.*?[^'])\](.*?)\[/color\]#si", "\\2", $tresc);

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klasa bbcode

Zobacz kod dodany do tego wpisu
- <?php
 /**** USER == ALL ****/
 
 /********
 BBCODE.CLASS.PHP - A BBcode class
 
 @author Robin Erixon (robin@robinerixon.se)
 @copyright Robin Erixon - 2008
 @version 1.0
 
 This class may be used as long as this comment section is intact.
 
 Available tags:
 [b] [/b] = Bold.
 [i] [/i] = Italic.
 [color= ] [/color] = Colored.
 [url] [/url] = Link type 1.
 [url= ] [/url] = Link typ 2.
 [youtube= ] [/youtube] = Embedded Youtube player.
 [google] [/google] = Link direct to search result.
 [quote] [/quote] = A quote.
 [img] [/img] = Shows an image.
 [code] [/code] = Simple code box.
 [highlight] [/highlight] = Highlight a word or a piece of text.
 [size= ] [/size] = Change size of text
 ********/
 
 class BBcode
 {
 /**************************** SETTINGS *****************************/
 // Choose default active tags.
 private $activeTags = array(
 'b' => true,
 'i' => true,
 'color' => true,
 'highlight' => true,
 'size' => true,
 'color=' => true,
 'smiley' => true,
 'quote' => true,
 'img' => true,
 'youtube' => true,
 'code' => true,
 'url' => true,
 'url=' => true
 );
 
 // Choose pre-defined colors. The user writes a colorname that translates into a color(hex)
 private $preDefinedColors = array(
 'black' => '000000',
 'white' => 'ffffff',
 'green' => 'cad5a3'
 );
 
 // Choose pre-defined smilies.The user writes a smiley and that translates into a image name.
 private $preDefinedSmilies = array(
 ':smile:' => 'Smilies/smile.png',
 ':sad:' => 'Smilies/sad.png',
 ':love:' => 'Smilies/love.png'
 );
 /************************* END OF SETTINGS **************************/
 
 public function tagState($tag, $state) {
 
 $this->activeTags[$tag] = $state;
 }
 
 public function exec($str) {
 
 // Protect against evil code
 $str = htmlentities($str);
 
 // Bold
 if ($this->activeTags['b'] === true) {
 
 $str = preg_replace('#[b](.*?)[/b]#is', '1', $str);
 }
 
 // Italic
 if ($this->activeTags['i'] === true) {
 
 $str = preg_replace('#[i](.*?)[/i]#is', '1', $str);
 }
 
 // Colored
 if ($this->activeTags['color'] === true) {
 
 $str = preg_replace('#[color=(#([a-f0-9]){3,6})](.*?)[/color]#is', '3', $str);
 }
 
 // Highlight
 if ($this->activeTags['highlight'] === true) {
 
 $str = preg_replace('#[highlight](.*?)[/highlight]#is', '1', $str);
 }
 
 // Font size
 if ($this->activeTags['size'] === true) {
 
 $str = preg_replace('#[size=(7|9|12|18|24)](.*?)[/size]#is', '2', $str);
 }
 
 // Pre defenied colors
 if ($this->activeTags['color='] === true) {
 
 foreach ($this->preDefinedColors as $color => $hex) {
 
 $str = preg_replace('#[color=(' . $color . ')](.*?)[/color]#is', '2', $str);
 }
 }
 
 // Smilies
 if ($this->activeTags['smiley'] === true) {
 
 foreach ($this->preDefinedSmilies as $code => $smiley) {
 
 $str = preg_replace('#(' . $code . ')#is', '<img src="' . $smiley . '" alt="Smiley" />', $str);
 }
 }
 
 // Quote
 if ($this->activeTags['quote'] === true) {
 
 $str = preg_replace('#[quote](.*?)[/quote]#is', '<div class="quoteDiv">1</div>', $str);
 }
 
 // Image
 if ($this->activeTags['img'] === true) {
 
 $str = preg_replace('#[img]((http://)?)(.*?)[/img]#ise', "'$1' != '' ? '<img src="$1$3" alt="$1$3" />' : '<img src="http://$3" alt="http://$3" />'", $str);
 }
 
 // Youtube
 if ($this->activeTags['youtube'] === true) {
 
 $str = preg_replace('#[youtube](.*?)[/youtube]#is', '<object width="425" height="355"><param name="movie" value="http://www.youtube.com/v/1&hl=en"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/1&hl=en" type="application/x-shockwave-flash" wmode="transparent" width="425" height="355"></embed></object>', $str);
 }
 
 // Code
 if ($this->activeTags['code'] === true) {
 
 $str = preg_replace('#[code](.*?)[/code]#is', '<div class="codeDiv">1</div>', $str);
 }
 
 // URL 1
 if ($this->activeTags['url'] === true) {
 
 $str = preg_replace('#[url](http://)?(.*?)[/url]#ise', "'$1' != '' ? '<a href="$1$2">$1$2</a>' : '<a href="http://$2">$2</a>'", $str);
 }
 
 // URL 2
 if ($this->activeTags['url='] === true) {
 
 $str = preg_replace('#[url=(http://)?(.*?)](.*?)[/url]#ise', "'$1' != '' ? '<a href="$1$2">$3</a>' : '<a href="http://$2">$3</a>'", $str);
 }
 
 // Line breaks
 $str = nl2br($str);
 
 return $str;
 }
 }
 ?>