[Solved] parse and sort links [closed]

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You can do it just by extracting the domain and using it as index for an array with the encrypted values, like so: 

$url=$_POST['url'];
$url=nl2br($url);
$url=explode("<br />",$url);
$urls = array();
foreach ($url as $value ){
   $arr = explode('www.',$value);
   $encrypt = md5($value);
   $urls[$arr[1]][]= $encrypt; //this line now fixed, had an error
}
foreach($urls as $key => &$val) {
   echo $key . "<br>";
   foreach($val as $v) {
      echo $v . "<br>";
   }
   echo "<br>";
}

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solved parse and sort links [closed]