Ras. M Ras. M - 20 days ago 5
PHP Question

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

I'm trying to let people log in with steam, using this 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: ' . $openid->authUrl());
} else {
echo "<h2>Connect to Steam</h2>";
echo "<form action='?login' method='post'>";
echo "<input type='image' src='http://cdn.steamcommunity.com/public/images/signinthroughsteam/sits_small.png'>";
echo "</form>";
}
} elseif($openid->mode == 'cancel') {
echo 'User has canceled authentication!';
} else {
if($openid->validate()) {
echo "User is 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 as $player) {

}

} else {
echo "User is not logged in.\n";
}
}
} catch(ErrorException $e) {
echo $e->getMessage();
}

?>


I get this error:


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


I can't find the issue! I know where the problem is, but can't find anything wrong with what I've done. What's the cause, and how do I fix it?

Answer

You forgot one "\" before "/)" on your pattern :

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

So php is thinking that "/(" is a modifier : http://php.net/manual/sr/reference.pcre.pattern.modifiers.php