php中foreach和for到底有没有区别,尤其是在处理多线程(本例是对IOS进行推送)方面?
2014-02-27 来自:蓓蓓♫ 1 人回应

遇到一个困难,解决了好长时间,最后发现是用for 不好使,用foreach好使。
这段代码是针对php对IOS推送的代码。
用foreach那里,如果改成for i=0 i<长度,那样,print_r("the ".$i." item :".$deviceToken);这里就只能打印出数组第一条内容(我确定如果抛开这个代码单独打印数组是可以打印出来所有内容的),如果用foreach则都能打印。。这里用for为什么不行呢?

<?php
// 循环有问题
require_once "/home/bae/app/include/db.php";

$db_obj = new DB();
$sql = "select appleID from appleDevice ";
$result = $db_obj->db_array($sql);

print_r("the array is:".$result);

var_dump($result);

$countArray = count($result);

print_r("number:".$countArray);

$passphrase = 'zhaojian';
$message = 'My first push notification!';

$ctx = stream_context_create();
stream_context_set_option($ctx, 'ssl', 'local_cert', 'ck.pem');
stream_context_set_option($ctx, 'ssl', 'passphrase', $passphrase);

// Open a connection to the APNS server
$fp = stream_socket_client(
'ssl://gateway.sandbox.push.apple.com:2195', $err,
$errstr, 60, STREAM_CLIENT_CONNECT|STREAM_CLIENT_PERSISTENT, $ctx);

if (!$fp)
exit("Failed to connect: $err $errstr" . PHP_EOL);

echo 'Connected to APNS' . PHP_EOL;

// Create the payload body
$body['aps'] = array(
'alert' => $message,
'sound' => 'default'
);

// Encode the payload as JSON
$payload = json_encode($body);

//$result = array("2d4401e324e7bd0ce574508b0849c7584b965df4ab183c82b3da65855835ec27","e20f2879b0ff6b7c6554b44f339c9e4bade2ee4a5a3a6d5de77bda074269221f");

foreach ($result as $device) {
$deviceToken = $device['appleID'];

print_r("the ".$i." item :".$deviceToken);

$msg = chr(0) . pack('n', 32) . pack('H*', $deviceToken) . pack('n', strlen($payload)) . $payload;
$result = fwrite($fp, $msg, strlen($msg));

if (!$result)
echo 'Message not delivered' . PHP_EOL;
else
echo 'Message successfully delivered' . PHP_EOL;
}


fclose($fp);

?>
2014-02-27 来自:Fail

问题已经解决,result重名问题,还有就是foreach循环的是数组的拷贝,所以才没产生问题

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