Question

在我的网站上我有三个正则表达式（一个是禁用的，你会明白为什么......）来代替用户发布的内容：

1°将电子邮件替换为已链接的电子邮件：

$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，很明显，第三个用替换之前的regexp替换youtube链接（切换序列，打破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; - ）

Answer 1

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);

PHP preg_replace：将Youtube链接替换为替换URL

1 个答案: