Php 使用正则表达式从url获取id

URL始终以以下内容开头：

http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F1234567
http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F1234567%2Fsubtitle
http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F123456
http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F123456%2Fsubtitle
http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F1234567%2F
http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F123456%2F

ID始终为数字，但位数可能会有所不同

如何从上述示例URL获取id（

1234567

和

123456

）

我尝试过使用以下模式，但运气不佳（它不会返回任何匹配项）：

---

也有一种不用解析的方法。假设$url=url

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也有一种不用解析的方法。假设$url=url

---

我建议您首先提取

url

querystring参数并对其进行url解码：

$url = "http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F1234567%2Fsubtitle";
$reg = "/^([\w\d\.:]+).*movie%2F(\d+).*/";
$id = preg_replace($reg,"$2",$url);

像这样：

function getParameterByName(url, name)
{
  name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
  var regexS = "[\\?&]" + name + "=([^&#]*)";
  var regex = new RegExp(regexS);
  var results = regex.exec(url);
  if(results == null)
    return "";
  else
    return decodeURIComponent(results[1].replace(/\+/g, " "));
}

---

然后使用一些正则表达式解析

p

并提取必要的信息，如

/\d+/

，我建议您首先提取

url

查询字符串参数并对其进行url解码：

$url = "http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F1234567%2Fsubtitle";
$reg = "/^([\w\d\.:]+).*movie%2F(\d+).*/";
$id = preg_replace($reg,"$2",$url);

var url = 'http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F1234567';
var p = getParameterByName(url, 'url');

像这样：

function getParameterByName(url, name)
{
  name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
  var regexS = "[\\?&]" + name + "=([^&#]*)";
  var regex = new RegExp(regexS);
  var results = regex.exec(url);
  if(results == null)
    return "";
  else
    return decodeURIComponent(results[1].replace(/\+/g, " "));
}

然后使用一些正则表达式解析

p

，并提取必要的信息，如

/\d+/

var url = 'http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F1234567';
var p = getParameterByName(url, 'url');

接吻。我本来打算使用

parse_url（）

，但是如果没有正则表达式，就无法解析查询字符串

---

接吻。我本来打算使用

parse_url（）

，但是如果没有正则表达式，就无法解析查询字符串。

看起来您需要转义一些特殊字符。 尝试：

---

/^http://example.com/movie.swf\url=http%3A%2F%2Fexample.com%2Fmovie%2F（\d+）$/

看起来您需要转义一些特殊字符。 尝试：

---

/^http://example.com/movie.swf\url=http%3A%2F%2Fexample.com%2Fmovie%2F（\d+）$/

使用正确的url解析功能，您可以执行以下操作：

$urls = array(
   'http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F1234567'
   , 'http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F1234567%2Fsubtitle'
   , 'http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F123456'
   , 'http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F123456%2Fsubtitle'
   , 'http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F1234567%2F'
   , 'http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F123456%2F'
);

foreach ($urls as $url) {
   if (preg_match('/%2Fmovie%2F(\d+)/', $url, $matches)) {
      var_dump($matches[1]);
   }
}

---

使用适当的URL解析功能，您可以执行以下操作：

$urls = array(
   'http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F1234567'
   , 'http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F1234567%2Fsubtitle'
   , 'http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F123456'
   , 'http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F123456%2Fsubtitle'
   , 'http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F1234567%2F'
   , 'http://example.com/movie.swf?url=http%3A%2F%2Fexample.com%2Fmovie%2F123456%2F'
);

foreach ($urls as $url) {
   if (preg_match('/%2Fmovie%2F(\d+)/', $url, $matches)) {
      var_dump($matches[1]);
   }
}