我有以下文字
"I made this video on my birthday. All of my friends are here in party. Click play to video the video
http://www.youtube.com/watch?v=G3j6avmJU48&feature=g-all-xit "
我想要的是将上面的网址替换为
"I made this video on my birthday. All of my friends are here in party. Click play to video the video
<iframe width="853" height="480" src="http://www.youtube.com/embed/G3j6avmJU48" frameborder="0" allowfullscreen></iframe> "
我知道我们可以通过以下脚本从上面的网址获取YouTube视频ID
preg_match("#(?<=v=)[a-zA-Z0-9-]+(?=&)|(?<=v\/)[^&\n]+(?=\?)|(?<=v=)[^&\n]+|(?<=youtu.be/)[^&\n]+#", $word, $matches);
$youtube_id = $matches[0];
但我不知道如何更换网址
http://www.youtube.com/watch?v=G3j6avmJU48&feature=g-all-xit
到
<iframe width="853" height="480" src="http://www.youtube.com/embed/G3j6avmJU48" frameborder="0" allowfullscreen></iframe>
请帮助谢谢
答案 0 :(得分:1)
使用preg_replace函数(see PHP preg_replace() Documentation)
修改:
使用preg_replace如下:使用括号()来包装要在正则表达式中捕获的内容(第一个参数),然后在第二个参数中使用$ n(在正则表达式中使用括号顺序)你捕获了什么。
在你的情况下你应该有这样的东西:
$text = "I made this video on my birthday. All of my friends are here in party. Click play to video the video http://www.youtube.com/watch?v=G3j6avmJU48&feature=g-all-xit";
$replaced = preg_replace('#http://www\.youtube\.com/watch\?v=(\w+)[^\s]+#i','<iframe width="853" height="480" src="http://www.youtube.com/embed/$1" frameborder="0" allowfullscreen></iframe>',$text);
有关更多高级用法和示例,请参阅我之前提供给您的文档链接。
希望这对你有所帮助。
编辑2: 正则表达式是错误的,我修复了它。
答案 1 :(得分:0)
您可以使用此示例代码来实现它,基于@Matt评论:
<?php
$text = "I made this video on my birthday. All of my friends are here in party. Click play to video the video
http://www.youtube.com/watch?v=G3j6avmJU48&feature=g-all-xit ";
$rexProtocol = '(https?://)?';
$rexDomain = '(www\.youtube\.com)';
$rexPort = '(:[0-9]{1,5})?';
$rexPath = '(/[!$-/0-9:;=@_\':;!a-zA-Z\x7f-\xff]*?)?';
$rexQuery = '(\?[!$-/0-9:;=@_\':;!a-zA-Z\x7f-\xff]+?)?';
$rexFragment = '(#[!$-/0-9:;=@_\':;!a-zA-Z\x7f-\xff]+?)?';
function callback($match)
{
$completeUrl = $match[1] ? $match[0] : "http://{$match[0]}";
$videoId = array ();
preg_match ("|\?v=([a-zA-Z0-9]*)|", $match[5], $videoId);
return '<iframe src="http://www.youtube.com/embed/' . $videoId[1] . '" width="853" height="480"></iframe>';
}
print preg_replace_callback("&\\b$rexProtocol$rexDomain$rexPort$rexPath$rexQuery$rexFragment(?=[?.!,;:\"]?(\s|$))&", 'callback', htmlspecialchars($text));
?>