將YouTube嵌入代碼僅限於網址

Question

請幫忙！

我需要剝去下面的代碼，以便它只有在這種情況下使用「值」部分

$<object width="360" height="226"><param name="movie" value="http://www.youtube.com/v/IkZuQ-aTIs0"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/IkZuQ-aTIs0" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="360" height="226"></embed></object> 

因此，這將剝離下來到http://www.youtube.com/v/IkZuQ-aTIs0

美中不足的是，這是動態所以它將這些嵌入代碼拉到不同的文件中，以便它們改變。

請幫忙：D

Answer 1

最好的方法是使用DOM解析器。

http://php.net/manual/en/class.domdocument.php

$doc = new DOMDocument(); 
$doc->loadHTML('<object width="360" height="226"><param name="movie" value="http://www.youtube.com/v/IkZuQ-aTIs0"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/IkZuQ-aTIs0" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="360" height="226"></embed></object>'); 

Answer 2

<?php 

$string = '<object width="360" height="226"><param name="movie" value="http://www.youtube.com/v/IkZuQ-aTIs0"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/IkZuQ-aTIs0" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="360" height="226"></embed></object>'; 

preg_match_all('#http://www.youtube.com/v/([\w\-]+){11}#is', $string, $matches); 

print_r(array_unique($matches[0])); 

?> 

Answer 3

$string = '<object width="360" height="226"><param name="movie" value="http://www.youtube.com/v/IkZuQ-aTIs0"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/IkZuQ-aTIs0" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="360" height="226"></embed></object>'; 

$start = strpos($string, 'value="'); 
$string = substr($string, $start + 7); 
$end = strpos($string, '" '); 
$string = substr($string, 0, $end); 

echo $string; 

略高於webartos更復雜，但是會抓住任何價值，而不是僅僅在Youtube鏈接