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在我的网站中,我有三个正则表达式(一个被禁用,你会明白为什么......)来替换用户发布的内容:

1° 将电子邮件替换为链接的电子邮件:

$string = preg_replace("/([\w-?&;#~=\.\/]+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,3}|[0-9]{1,3})(\]?))/i","<a href=\"mailto:$1\">$1</a>",$string);

2° 用嵌入视频替换 Youtube 链接:

$pattern = '/http:\/\/www\.youtube\.com\/watch\?(.*?)v=([a-zA-Z0-9_\-]+)(\S*)/i';
$replace = '<iframe title="YouTube" class="youtube" type="text/html" width="320" height="240" src="http://www.youtube.com/embed/$2" frameborder="0" allowFullScreen></iframe>';
$string = preg_replace($pattern, $replace, $string);

3° 用链接的链接替换链接(这些链接被禁用!):

 /*** make sure there is an http:// on all URLs ***/
$string = preg_replace("/([^\w\/])(www\.[a-z0-9\-]+\.[a-z0-9\-]+)/i", "$1http://$2",$string);
/*** make all URLs links ***/
$string = preg_replace("/([\w]+:\/\/[\w-?&;#~=\.\/\@]+[\w\/])/i","<a target=\"_blank\" href=\"$1\">$1</a>",$string);

我的问题是,显然,第三个替换 youtube 链接在它们被以前的正则表达式替换后(切换序列,中断 youtube 视频)

如何启用第三个正则表达式来替换忽略 youtube 模式的 URL?谢谢 ;-)

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1 回答 1

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试试这个:

// youtube
$string = preg_replace("/\s*[a-zA-Z\/\/:\.]*youtube.com\/watch\?v=([a-zA-Z0-9\-_]+)([a-zA-Z0-9\/\*\-\_\?\&\;\%\=\.]*)/i"," <object width=\"100%\" height=\"344\"><param name=\"movie\" value=\"http://www.youtube.com/v/$1&hl=en&fs=1\"></param><param name=\"allowFullScreen\" value=\"true\"></param><embed src=\"http://www.youtube.com/v/$1&hl=en&fs=1\" type=\"application/x-shockwave-flash\" allowfullscreen=\"true\" width=\"100%\" height=\"450\"></embed></object>  ",$string);

// email
$string = preg_replace("/([\w-?&;#~=\.\/]+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,3}|[0-9]{1,3})(\]?))/i","<a href=\"mailto:$1\">$1</a>", $string);

// links
$string = preg_replace("#(^|[\n\s>])([\w]+?://[^\s\"\n\r\t<]*)#is", "\\1<a href=\"\\2\">\\2</a>", $string);
于 2012-05-03T18:04:34.150 回答