使用php从url检索主机名无效

我正在尝试解析批量URL。为此，我编写了以下代码。它没有正确解析URL。我确实需要你的建议，我可能需要更改/更改什么才能使代码正常工作。多谢各位

$expr = '[^https*://([^:/]+):?(\d*)/([^?]*)\??(.*)]';
$matches = array();
$fh = fopen('urls.txt', 'r') or die($php_errormsg);
while (!feof($fh)) {
    $item = fgets($fh);
    if (preg_match($expr, $item, $matches)) {
       list($host, $port, $dir, $args) = array_splice($matches, 1, 4);
       print "Host=>$host\n";
       print "Port=>$port\n";
       print "Dir=>$dir\n";
       print "Arguments=>$args\n";
    } else {
        print "Doesn't match.\n";
    }
}
fclose($fh);

使用解析url

$matches = array();
$fh = fopen('urls.txt', 'r') or die($php_errormsg);
while (!feof($fh)) {
    $item = fgets($fh);
    $tmp = parse_url($item);
    if( isset($tmp['host']) ) {
      print "Host=".$tmp['host']."\n";
      print "Port=".$tmp['port']."\n";
      print "Dir=".$tmp['path']."\n";
      print "Host=".$tmp['query']."\n";
    } else {
       print "Doesn't match.\n";
    }
}
fclose($fh);

---

它“不正确”在做什么？也许您想使用parse_url（）函数而不是正则表达式？