lightopenid - PHP | preg_match(): Unknown modifier '(' in C:\xampp\htdocs\Folder\index.php on line 38 -


i'm trying let people log in steam, using code:

<?php  require './includes/lightopenid/openid.php';   $_steamapi = "mykey";  try {     $openid = new lightopenid('localhost');     if(!$openid->mode) {         if(isset($_get['login'])) {             $openid->identity = 'http://steamcommunity.com/openid/?l=english';             header('location: ' . $openid->authurl());         } else {             echo "<h2>connect steam</h2>";             echo "<form action='?login' method='post'>";             echo "<input type='image' src='http://cdn.steamcommunity.com/public/images/signinthroughsteam/sits_small.png'>";             echo "</form>";         }     } elseif($openid->mode == 'cancel') {         echo 'user has canceled authentication!';     } else {         if($openid->validate()) {             echo "user logged in.\n";                  $id = $openid->identity;                 $ptn = "/^http:\/\/steamcommunity\.com\/openid\/id/(7[0-9]{15,25}+)$/";                 preg_match($ptn, $id, $matches);                       $url = "http://api.steampowered.com/isteamuser/getplayersummaries/v0002/?key=$_steamapi&steamids=$matches[1]";                 $json_object= file_get_contents($url);                 $json_decoded = json_decode($json_object);                 foreach ($json_decoded->response->players $player) {                  }          } else {             echo "user not logged in.\n";         }     } } catch(errorexception $e) {     echo $e->getmessage(); }  ?> 

i error:

php | preg_match(): unknown modifier '(' in c:\xampp\htdocs\folder\index.php on line 38

i can't find issue! know where problem is, can't find wrong i've done. what's cause, , how fix it?

you forgot 1 "\" before "/)" on pattern :

$ptn = "/^http:\/\/steamcommunity\.com\/openid\/id\/(7[0-9]{15,25}+)$/"; 

so php thinking "/(" modifier : http://php.net/manual/sr/reference.pcre.pattern.modifiers.php


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