将 YouTube 嵌入代码精简为仅 URL

Question

请帮忙！

我需要删除以下代码，以便它只使用“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>

所以在这种情况下，它将把它删除为 http://www.youtube.com/v/IkZuQ-aTIs0

问题是这是动态的，因此它会为不同的文件提取这些嵌入代码，因此它们会发生变化。

请帮忙：D

Answer 1

<?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 2

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 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;

比 webartos 复杂一点，但会获取任何价值，而不仅仅是 YouTube 链接