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bbcode.php
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bbcode.php
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<?php
/**
* BBCode to HTML converter
*
* Inspired by Kai Mallea (kmallea@gmail.com)
*
* Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php
*/
class BBCode {
protected $bbcode_table = array();
public function __construct() {
// Replace [br] with <br />
$this->bbcode_table["/\[br\]/is"] = function ($match) {
return "<br/>";
};
// Replace [p]...[/p] with <p>...</p>
$this->bbcode_table["/\[p\](.*?)\[\/p\]/is"] = function ($match) {
return "<p>$match[1]</p>";
};
// Replace [b]...[/b] with <strong>...</strong>
$this->bbcode_table["/\[b\](.*?)\[\/b\]/is"] = function ($match) {
return "<strong>$match[1]</strong>";
};
// Replace [i]...[/i] with <em>...</em>
$this->bbcode_table["/\[i\](.*?)\[\/i\]/is"] = function ($match) {
return "<em>$match[1]</em>";
};
// Replace [q]...[/q] with <q>...</q>
$this->bbcode_table["/\[q\](.*?)\[\/q\]/is"] = function ($match) {
return "<q>$match[1]</q>";
};
// Replace [code]...[/code] with <pre><code>...</code></pre>
$this->bbcode_table["/\[code\](.*?)\[\/code\]/is"] = function ($match) {
return "<pre><code>$match[1]</code></pre>";
};
// Replace [quote]...[/quote] with <blockquote><p>...</p></blockquote>
$this->bbcode_table["/\[quote\](.*?)\[\/quote\]/is"] = function ($match) {
return "<blockquote><p>$match[1]</p></blockquote>";
};
// Replace [quote cite="some cite source"]...[/quote] with <blockquote cite="some cite source"><p>...</p></blockquote>
$this->bbcode_table["/\[quote cite=\"([^\"]+)\"\](.*?)\[\/quote\]/is"] = function ($match) {
return "<blockquote cite=\"$match[1]\"><p>$match[2]</p></blockquote>";
};
// Replace [quote name="person"]...[/quote] with person wrote: <blockquote><p>...</p></blockquote>
$this->bbcode_table["/\[quote name=\"([^\"]+)\"\](.*?)\[\/quote\]/is"] = function ($match) {
return "<span class=\"author\">$match[1] wrote:</span><br/><blockquote><p>$match[2]</p></blockquote>";
};
// Replace [quote="person"]...[/quote] with person wrote: <blockquote><p>...</p></blockquote>
$this->bbcode_table["/\[quote=\"([^\"]+)\"\](.*?)\[\/quote\]/is"] = function ($match) {
return "<span class=\"author\">$match[1] wrote:</span><br/><blockquote><p>$match[2]</p></blockquote>";
};
// Replace [quote name="person" cite="some cite source"]...[/quote] with person wrote: <blockquote cite="some cite source"><p>...</p></blockquote>
$this->bbcode_table["/\[quote name=\"([^\"]+)\" cite=\"([^\"]+)\"\](.*?)\[\/quote\]/is"] = function ($match) {
return "<span class=\"author\">$match[1] wrote:</span><br/><blockquote cite=\"$match[2]\"><p>$match[3]</p></blockquote>";
};
// Replace [quote="person" cite="some cite source"]...[/quote] with person wrote: <blockquote cite="some cite source"><p>...</p></blockquote>
$this->bbcode_table["/\[quote=\"([^\"]+)\" cite=\"([^\"]+)\"\](.*?)\[\/quote\]/is"] = function ($match) {
return "<span class=\"author\">$match[1] wrote:</span><br/><blockquote cite=\"$match[2]\"><p>$match[3]</p></blockquote>";
};
// OR:
// // Replace [quote=person]...[/quote] with <blockquote><p>...</p></blockquote>
// $this->bbcode_table["/\[quote=(.+?)\](.*?)\[\/quote\]/is"] = function ($match) {
// return "$match[1] wrote: <blockquote><p>$match[2]</p></blockquote>";
// };
// Replace [size=30]...[/size] with <span style="font-size:30pt">...</span>
$this->bbcode_table["/\[size=(\d+)\](.*?)\[\/size\]/is"] = function ($match) {
return "<span style=\"font-size:$match[1]pt;\">$match[2]</span>";
};
// Replace [s]...[/s] with <del>...</del>
$this->bbcode_table["/\[s\](.*?)\[\/s\]/is"] = function ($match) {
return "<del>$match[1]</del>";
};
// Replace [u]...[/u] with <span style="text-decoration:underline;">...</span>
$this->bbcode_table["/\[u\](.*?)\[\/u\]/is"] = function ($match) {
return '<span style="text-decoration:underline;">' . $match[1] . '</span>';
};
// Replace [left]...[/left] with <div style="text-align:left;">...</div>
$this->bbcode_table["/\[left\](.*?)\[\/left\]/is"] = function ($match) {
return '<div style="text-align:left;">' . $match[1] . '</div>';
};
// Replace [center]...[/center] with <div style="text-align:center;">...</div>
$this->bbcode_table["/\[center\](.*?)\[\/center\]/is"] = function ($match) {
return '<div style="text-align:center;">' . $match[1] . '</div>';
};
// Replace [right]...[/right] with <div style="text-align:right;">...</div>
$this->bbcode_table["/\[right\](.*?)\[\/right\]/is"] = function ($match) {
return '<div style="text-align:right;">' . $match[1] . '</div>';
};
// Replace [color=somecolor]...[/color] with <span style="color:somecolor;">...</span>
$this->bbcode_table["/\[color=([#a-z0-9]+)\](.*?)\[\/color\]/is"] = function ($match) {
return '<span style="color:' . $match[1] . ';">' . $match[2] . '</span>';
};
// Replace [email]...[/email] with <a href="mailto:...">...</a>
$this->bbcode_table["/\[email\](.*?)\[\/email\]/is"] = function ($match) {
return "<a href=\"mailto:$match[1]\">$match[1]</a>";
};
// Replace [email subject=your subject]...[/email] with <a href="mailto:...?subject=your subject">...</a>
$this->bbcode_table["/\[email subject=(.*?)\](.*?)\[\/email\]/is"] = function ($match) {
return "<a href=\"mailto:$match[2]?subject=$match[1]\">$match[2]</a>";
};
// Replace [email=someone@somewhere.com]An e-mail link[/email] with <a href="mailto:someone@somewhere.com">An e-mail link</a>
$this->bbcode_table["/\[email=([^\s]+?)\](.*?)\[\/email\]/is"] = function ($match) {
return "<a href=\"mailto:$match[1]\">$match[2]</a>";
};
// Replace [email=someone@somewhere.com subject=your subject]An e-mail link[/email] with <a href="mailto:someone@somewhere.com?subject=your subject">An e-mail link</a>
$this->bbcode_table["/\[email=([^\s]+?) subject=(.+?)\](.*?)\[\/email\]/is"] = function ($match) {
return "<a href=\"mailto:$match[1]?subject=$match[2]\">$match[3]</a>";
};
// Replace [url]...[/url] with <a href="...">...</a>
$this->bbcode_table["/\[url\](.*?)\[\/url\]/is"] = function ($match) {
return "<a href=\"$match[1]\" target=\"_blank\">$match[1]</a>";
};
// Replace [url=http://www.google.com/]A link to google[/url] with <a href="http://www.google.com/">A link to google</a>
$this->bbcode_table["/\[url=(.*?)\](.*?)\[\/url\]/is"] = function ($match) {
return "<a href=\"$match[1]\" target=\"_blank\">$match[2]</a>";
};
// Replace [img]...[/img] with <img src="..."/>
$this->bbcode_table["/\[img\](.*?)\[\/img\]/is"] = function ($match) {
return "<img src=\"$match[1]\"/>";
};
// Replace [img alt="..."]...[/img] with <img src="..." alt="..." />
$this->bbcode_table["/\[img alt=\"([^\"]+)\"\](.*?)\[\/img\]/is"] = function ($match) {
return "<img src=\"$match[2]\" alt=\"$match[1]\"/>";
};
// Replace [list]...[/list] with <ul><li>...</li></ul>
$this->bbcode_table["/\[list\](.*?)\[\/list\]/is"] = function ($match) {
$match[1] = preg_replace_callback("/\[\*\]([^\[\*\]]*)/is", function ($submatch) {
return "<li>" . preg_replace("/[\n\r?]$/", "", $submatch[1]) . "</li>";
}, $match[1]);
return "<ul>" . preg_replace("/[\n\r?]/", "", $match[1]) . "</ul>";
};
// Replace [list=1|a]...[/list] with <ol numeric|ol lower-alpha><li>...</li><ol>
$this->bbcode_table["/\[list=(1|a)\](.*?)\[\/list\]/is"] = function ($match) {
if ($match[1] == '1') {
$list_type = '<ol>';
} else if ($match[1] == 'a') {
$list_type = '<ol style="list-style-type: lower-alpha;">';
} else {
$list_type = '<ol>';
}
$match[2] = preg_replace_callback("/\[\*\]([^\[\*\]]*)/is", function ($submatch) {
return "<li>" . preg_replace("/[\n\r?]$/", "", $submatch[1]) . "</li>";
}, $match[2]);
return $list_type . preg_replace("/[\n\r?]/", "", $match[2]) . "</ol>";
};
// Replace [youtube]...[/youtube] with <iframe src="..."></iframe>
$this->bbcode_table["/\[youtube\](?:https?:\/\/)?(?:www\.)?youtube(?:\.com\/watch\?v=)([A-Z0-9\-_]+)(?:&(.*?))?\[\/youtube\]/is"] = function ($match) {
return "<iframe width=\"420\" height=\"315\" src=\"https://www.youtube.com/embed/$match[1]\" frameborder=\"0\" allowfullscreen></iframe>";
};
// Alternative: Replace [youtube]...[/youtube] with <iframe src="..."></iframe>
$this->bbcode_table["/\[youtube\]([a-zA-Z0-9\-_]+)\[\/youtube\]/is"] = function ($match) {
return "<iframe width=\"420\" height=\"315\" src=\"https://www.youtube.com/embed/$match[1]\" frameborder=\"0\" allowfullscreen></iframe>";
};
// Replace [youtube size=111X333]...[/youtube] with <iframe src="..."></iframe>
$this->bbcode_table["/\[youtube size=([0-9]{1,4}+)X([0-9]{1,4}+)\](?:https?:\/\/)?(?:www\.)?youtube(?:\.com\/watch\?v=)([A-Z0-9\-_]+)(?:&(.*?))?\[\/youtube\]/is"] = function ($match) {
return "<iframe width=\"$match[1]\" height=\"$match[2]\" src=\"https://www.youtube.com/embed/$match[3]\" frameborder=\"0\" allowfullscreen></iframe>";
};
// Alternative: Replace [youtube size=111X333]...[/youtube] with <iframe src="..."></iframe>
$this->bbcode_table["/\[youtube size=([0-9]{1,4}+)X([0-9]{1,4}+)\]([a-zA-Z0-9\-_]+)\[\/youtube\]/is"] = function ($match) {
return "<iframe width=\"$match[1]\" height=\"$match[2]\" src=\"https://www.youtube.com/embed/$match[3]\" frameborder=\"0\" allowfullscreen></iframe>";
};
}
public function checkTag(
$_str
) {
$_index = 0;
$_stack = [];
$_value = '';
$_property = '';
$i = 0;
$l = strlen($_str);
while ($i < $l) {
// this searches for an opening tag
if ($_str[$i] === '[') {
$_tag = '';
$_newtag = '';
while (++$i < $l && $_str[$i] !== ']') {
$_tag .= $_str[$i];
}
// this searches for a closing a tag
if ($_tag[0] === '/') {
$_tag = strtolower(substr($_tag, 1));
$_index --;
while ($_index >= 0 && $_stack[$_index] !== $_tag) {
$_value .= $this->tagEncodeClosed($_stack[$_index]);
$_index --;
}
if ($_index === -1) {
return $_value;
}
$_value .= $this->tagEncodeClosed($_stack[$_index]);
} else {
// here it starts building the tag
$_tagCheck = $this->tagEncodeExclusive($_tag);
//if an exclusive tag was found
if ($_tagCheck !== null) {
$_value .= $_tagCheck;
} else {
$_tag = preg_split("/\s+/", $_tag);
$_tag[0] = strtolower($_tag[0]);
$_tmpTag = $_tag[0];
$j = 0;
while ($j < strlen($_tmpTag) && $_tmpTag[$j] !== '=') {
$_newtag .= $_tmpTag[$j];
$j ++;
}
//if there is a property it will add it to the tag
while ($j < strlen($_tmpTag)) {
$_property .= $_tmpTag[$j];
$j ++;
}
$_value .= $this->tagEncode($_newtag, array_slice($_tag, 1), "", $_property);
// resetting the property
$_property = "";
$_stack[$_index ++] = $_newtag;
}
}
} else {
$_value .= $_str[$i];
}
$i ++;
}
$_index --;
// closing all tags that are not closed
while ($_index >= 0) {
$_value .= $this->tagEncodeClosed($_stack[$_index]);
$_index --;
}
return $_value;
}
protected function tagEncodeExclusive(
$_tag
) {
switch ($_tag) {
case "br":
return "[br]";
case "*":
return "[*]";
}
return null;
}
protected function tagEncode(
$_tag, $_arguments = null, $_closed = "", $_property = ""
) {
$_val = null;
switch ($_tag) {
case "b":
$_val = "b";
break;
case "i":
$_val = "i";
break;
case 's':
$_val = "s";
break;
case 'u':
$_val = "u";
break;
case 'q':
$_val = "q";
break;
case 'p':
$_val = "p";
break;
case 'code':
$_val = "code";
break;
case 'email':
$_val = "email";
break;
case 'url':
$_val = "url";
break;
case 'img':
$_val = "img";
break;
case 'quote':
$_val = "quote";
break;
case 'youtube':
$_val = "youtube";
break;
case 'font':
$_val = "font";
break;
case 'size':
$_val = "size";
break;
case 'color':
$_val = "color";
break;
case 'left':
$_val = "left";
break;
case 'center':
$_val = "center";
break;
case 'right':
$_val = "right";
break;
case 'list':
$_val = 'list';
break;
}
if (is_array($_arguments)) {
$_arguments = implode(" ", $_arguments);
if (!empty($_arguments)) {
$_arguments = " " . $_arguments;
}
}
if ($_property !== "") {
return $_val !== null ? "[" . $_closed . $_val . $_property . $_arguments . "]" : null;
}
return $_val !== null ? "[" . $_closed . $_val . $_arguments . "]" : null;
}
protected function tagEncodeClosed(
$_tag, $_arguments = null, $_property = ""
) {
return $this->tagEncode($_tag, $_arguments, "/", $_property);
}
public function toHTML($str, $escapeHTML = true, $nr2br = true) {
if (!$str) {
return "";
}
if ($escapeHTML) {
$str = htmlspecialchars($str, ENT_NOQUOTES);
}
foreach ($this->bbcode_table as $key => $val) {
$str = preg_replace_callback($key, $val, $str);
}
if ($nr2br) {
$str = preg_replace_callback("/\n\r?/", function ($match) {
return "<br/>";
}, $str);
}
return $str;
}
}
?>