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POFatal error.. Call to a member function.. on a non-object
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copied!<p>I have a <code>GCM</code> class which includes a send_notification function. In a different class, <code>Demand.php</code>, I am trying to use the send_notification function. So I have a constructor in <code>Demand.php</code> which points to my <code>GCM</code> class like this:</p> <pre><code> $gcm = new GCM(); </code></pre> <p>This <code>$gcm</code> variable is used in a function inside that class like this:</p> <pre><code>$result = $gcm->send_notification($registatoin_ids, $message); </code></pre> <p>That's where I get the error:</p> <pre><code><br />n<b>Fatal error</b>: Call to a member function send_notification() on a non-object in.. </code></pre> <p>I searched for the problem and found out that the problem is that <code>$gcm</code> is null and that's why it's calling nothing. So when I put the</p> <pre><code>$gcm = new GCM(); </code></pre> <p>Inside my function it worked correctly. But is there no other way of doing this? I mean should it not be alright only by putting creating <code>$gcm</code> in the constructor of <code>Demand.php</code>?</p> <p>Here are the parts where I am referring to:</p> <pre><code>function __construct() { require_once 'GCM.php'; require_once 'DB_Connect.php'; require_once 'DB_Functions.php'; // connecting to database $this->db = new DB_Connect(); $this->db->connect(); $gcm = new GCM(); $df = new DB_Functions(); } // destructor function __destruct() { } public function getDistance($uuid, $name, $distance, $latstart, $lonstart, $latend, $lonend, $gcm_regId) { $user_new = array ("$uuid", "$name", "$distance","$latstart", "$lonstart", "$latend", "$lonend","$gcm_regId"); $query = sprintf("SELECT uid, distance,latstart, lonstart, latend, lonend, gcm_regid, name FROM user_demand WHERE latstart='%s' AND lonstart='%s'", mysql_real_escape_string($latstart), mysql_real_escape_string($lonstart)); $user = mysql_query($query); $no_of_rows = mysql_num_rows($user); while($user_old = mysql_fetch_assoc($user)) { $djson = $this->findDistance($latend,$lonend,$user_old["latend"],$user_old["lonend"] ); if ($user_old["distance"]+$distance>=$djson) { $match = mysql_query("INSERT INTO matched_users(gcm_a, gcm_b, name_a, name_b) VALUES(".$user_old['gcm_regid'].",".$user_new['gcm_regId'].",".$user_old['name'].",".$user_new['name'].")"); $registatoin_ids = array($gcm_regId); $message = array("var" => $name); $result = $gcm->send_notification($registatoin_ids, $message); } } } </code></pre>

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