apns_push.php

<?php
function sendMessageViaApplePush($apns_environment, $certificate, $pushToken, $messageText) {
    if ($apns_environment == "development") {
		$serverURL = 'gateway.sandbox.push.apple.com:2195';
    } else {
        $serverURL = 'gateway.push.apple.com:2195';
    }

    $ctx = stream_context_create();
    stream_context_set_option($ctx, 'ssl', 'local_cert', $certificate);

    $fp = stream_socket_client(
        'ssl://' . $serverURL, $err, $errstr, 60,
        STREAM_CLIENT_CONNECT|STREAM_CLIENT_PERSISTENT, $ctx);

    if ($fp == null) {
        $ans['success'] = '0';
        $ans['error_description'] = "Failed to connect to apple server: $err $errstr";
        $ans['data'] = 'null';    
        $jsonAns = json_encode($ans);
        echo $jsonAns;
        //die();
    }
    
    $body['aps'] = array(
        'alert' => $messageText,
        'sound' => 'default'
    );

    $payload = json_encode($body);


$apnsMessage = 
    $msg = chr(1)                       // command (1 byte)
         . pack('N', 0)
         . pack('N', time() + 86400)
         . pack('n', 32)                // token length (2 bytes)
         . pack('H*', $pushToken)//)     // device token (32 bytes)
         . pack('n', strlen($payload))  // payload length (2 bytes)
         . $payload;                    // the JSON payload

    $result = @fwrite($fp, $msg, strlen($msg));

    if (!$result) {
        $ans['success'] = '0';
        $ans['error_description'] = 'Fail to send push via IOS';
        $ans['data'] = 'null';    
        $jsonAns = json_encode($ans);
        echo $jsonAns;
    } else {
        $ans['success'] = '1';
        $ans['error_description'] = 'null';
        $ans['data'] = 'Success to send push via IOS';    
        $jsonAns = json_encode($ans);
        echo $jsonAns;
    }

    fclose($fp);
}

sendMessageViaApplePush("production", "prod-ipad.pem", "", "Hello");