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Simple BBcode rendering function (PHP).
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| <?php | |
| /** | |
| * Renders BBCode to html, suitable to be embedded in a document. Supports only | |
| * a limited set of BBCode tags (can be extended), which are: | |
| * | |
| * @param $bbcode The bbcode to be rendered. Must not be `null` or empty | |
| * string. | |
| * @param $reps Optional additional replacements. Allows you to add custom tags | |
| * etc. Should be an associative array, mapping a regex (preg) to replacement. | |
| * For example: `array('{\[b\](.+?)\[/b\]}is' => "<b>$1</b>\n")` adds the | |
| * [b] tag. | |
| */ | |
| function bbcode($bbcode, $reps = array()) { | |
| assert($bbcode != null && $bbcode != ''); | |
| // first encode any HTML special charaters | |
| $bbcode = htmlentities($bbcode); | |
| // ensure paragraph structure | |
| $bbcode = "<p>$bbcode</p>"; | |
| // single lines to paragraph break | |
| $bbcode = preg_replace('/^\s*$/m', '</p><p>', $bbcode); | |
| // add built-in regex replacements to perform (i.e. core bbcode tags) | |
| $reps['{\[b\](.+?)\[/b\]}is'] = "<b>$1</b>\n"; // [b] - bold | |
| $reps['{\[i\](.+?)\[/i\]}is'] = "<i>$1</i>\n"; // [i] - italic | |
| $reps['{\[u\](.+?)\[/u\]}is'] = "<u>$1</u>\n"; // [u] - underline | |
| $reps['{\[s\](.+?)\[/s\]}is'] = "<s>$1</s>\n"; // [s] - strikethrough | |
| $reps['{\[color=(.+?)\](.*?)\[/color\]}is'] = "<span style='color:$1;'>$2</span>\n"; // [color] | |
| $reps['{\[quote\](.*?)\[/quote\]}is'] = "</p>\n<blockquote><p>\n$1\n</p></blockquote>\n<p>\n"; // [quote] | |
| $reps['{\[code\](.*?)\[/code\]}is'] = "<pre>$1</pre>\n"; // [code] | |
| $reps['{\[url\](.+?)\[/url\]}is'] = "<a href='$1'>$1</a>\n"; // [url] - raw url | |
| $reps['{\[url=(.*?)\](.+?)\[/url\]}is'] = "<a href='$1'>$2</a>\n"; // [url=] - with text | |
| $reps['{\[img\](.*?)\[/img\]}is'] = "<img src='$1' alt=''/>\n"; // [img] | |
| $reps['{\[ul\](.*?)\[/ul\]}is'] = "</p>\n<ul>$1</ul>\n<p>\n"; // [ul] - unordered list | |
| $reps['{\[ol\](.*?)\[/ol\]}is'] = "</p>\n<ol>$1</ol>\n<p>\n"; // [ol] - ordered list | |
| $reps['{\[\*\](.*?)\[/\*\]}is'] = "<li>\n<p>\n$1\n</p>\n</li>\n"; // [*] - list item | |
| // perform replacements | |
| foreach ($reps as $regex => $replace) | |
| $bbcode = preg_replace($regex, $replace, $bbcode); | |
| return $bbcode; | |
| } | |
| ?> |
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| <?php | |
| require_once dirname(__FILE__).'/code/bbcode.php'; | |
| $bbcode = isset($_POST['bbcode']) ? | |
| $_POST['bbcode']: | |
| '[quote]Write some [b]bbcode[/b] here![/quote]'; | |
| ?> | |
| <!DOCTYPE HTML> | |
| <html lang="en-US"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title></title> | |
| </head> | |
| <body> | |
| <h1>BBCode Test</h1> | |
| <form action="bbcode.php" method="post"> | |
| <label for="bbcode">BBCode:</label> | |
| <textarea name="bbcode" cols="30" rows="10"><?php echo $bbcode ?></textarea> | |
| <input type="submit" value="Preview"/> | |
| </form> | |
| <h2>Output</h2> | |
| <?php | |
| if (isset($bbcode)) | |
| echo bbcode($bbcode); | |
| ?> | |
| </body> | |
| </html> |
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