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<?php function getUbb($subject){$subject=preg_replace("/(\[)o_a(.*)(\])/iU", "<img src=\"http://images.cnblogs.com/cnblogs_com/perseverancevictory/570190/o_a\\2.gif\"/>", $subject);//正则替换$subject=preg_replace("/\[b\](.*)\[\/b\]/iU", "<b>\\1</b>", $subject);$subject=preg_replace("/\[url\](.*)\[\/url\]/iU", "<a href=\"\\1\">\\1</a>", $subject);return $subject;}if ($_POST['sub']) {echo getUbb($_POST['text']);# code...}?><hr>
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} </script><img src="http://images.cnblogs.com/cnblogs_com/perseverancevictory/570190/o_a1.gif" width="45" style="cursor:hand" οnclick='inserttag("[o_a1","]");'>
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<a href="javascript:void(0);" οnclick='inserttag("[b]","[/b]");'>加粗</a>
<a href="javascript:void(0);" οnclick='inserttag("[url]http://","[/url]");'>超链接</a><form action="" method="post"><textarea name="text" id="content" cols="40" rows="10"></textarea><input type="submit" name="sub" style="cursor:hand" value="提交"></form>