Discuz!开发之HTML转Discuz代码(bbcode)函数html2bbcode()

定义文件：sourcefunctionfunction_editor.php
函数定义：

function html2bbcode($text) {
	$text = strip_tags($text, '<table><tr><td><b><strong><i><em><u><a><div><span><p><strike><blockquote><ol><ul><li><font><img><br><br/><h1><h2><h3><h4><h5><h6><script>');


	if(ismozilla()) {
		$text = preg_replace("/(?<!<br>|<br />|
)(
|
|
)/", ' ', $text);
	}


	$pregfind = array(
		"/<script.*>.*</script>/siU",
		'/on(mousewheel|mouseover|click|load|onload|submit|focus|blur)="[^"]*"/i',
		"/(
|
|
)/",
		"/<table([^>]*(width|background|background-color|bgcolor)[^>]*)>/siUe",
		"/<table.*>/siU",
		"/<tr.*>/siU",
		"/<td>/i",
		"/<td(.+)>/siUe",
		"/</td>/i",
		"/</tr>/i",
		"/</table>/i",
		'/<h([0-9]+)[^>]*>/siUe',
		'/</h([0-9]+)>/siU',
		"/<img[^>]+smilieid="(d+)".*>/esiU",
		"/<img([^>]*src[^>]*)>/eiU",
		"/<as+?name=.+?".">(.+?)</a>/is",
		"/<br.*>/siU",
		"/<spans+?style="float:s+(left|right);">(.+?)</span>/is",
	);
	$pregreplace = array(
		'',
		'',
		'',
		"tabletag('\1')",
		'[table]',
		'[tr]',
		'[td]',
		"tdtag('\1')",
		'[/td]',
		'[/tr]',
		'[/table]',
		""[size=".(7 - \1)."]"",
		"[/size]

",
		"smileycode('\1')",
		"imgtag('\1')",
		'1',
		"
",
		"[float=\1]\2[/float]",
	);
	$text = preg_replace($pregfind, $pregreplace, $text);


	$text = recursion('b', $text, 'simpletag', 'b');
	$text = recursion('strong', $text, 'simpletag', 'b');
	$text = recursion('i', $text, 'simpletag', 'i');
	$text = recursion('em', $text, 'simpletag', 'i');
	$text = recursion('u', $text, 'simpletag', 'u');
	$text = recursion('a', $text, 'atag');
	$text = recursion('font', $text, 'fonttag');
	$text = recursion('blockquote', $text, 'simpletag', 'indent');
	$text = recursion('ol', $text, 'listtag');
	$text = recursion('ul', $text, 'listtag');
	$text = recursion('div', $text, 'divtag');
	$text = recursion('span', $text, 'spantag');
	$text = recursion('p', $text, 'ptag');


	$pregfind = array("/(?<!
|
|^)[(/list|list|*)]/", "/<li>(.*)((?=<li>)|</li>)/iU", "/<p.*>/iU", "/<p></p>/i", "/(<a>|</a>|</li>)/is", "/</?(A|LI|FONT|DIV|SPAN)>/siU", "/[url[^]]*][/url]/i", "/[url=javascript:[^]]*](.+?)[/url]/is");
	$pregreplace = array("
[\1]", "\1
", "
", '', '', '', '', "\1");
	$text = preg_replace($pregfind, $pregreplace, $text);


	$strfind = array(' ', '<', '>', '&');
	$strreplace = array(' ', '<', '>', '&');
	$text = str_replace($strfind, $strreplace, $text);


	return dhtmlspecialchars(trim($text));
}

　　使用举例：

require_once libfile('function/editor');
$html='<strong>这里是加粗文本</strong>';
$bbcode = html2bbcode($html);
echo $bbcode;
//输出：[b]这里是加粗文本[/b]