PHP message queue usage example analysis

The examples in this article describe the usage of PHP message queue. Share it with everyone for your reference, the details are as follows:

This message queue is used for process communication under Linux

#根据路径和后缀创建一个id
$key = ftok(__DIR__, 'R');
#获取队列中的消息
$q = msg_get_queue($key);
#删除队列
msg_remove_queue($q);
#获取队列的状态信息
$status = msg_stat_queue($q);
print_r($status);
echo "\n";
for($i=0;$i<100;$i++)
{
  /**
   * 向队列里添加消息 
   * resource $queue , int $msgtype , mixed $message [, bool $serialize = true [, bool $blocking = true [, int &$errorcode ]]]
   * $msgtype :消息的类型
   * $message : 具体的数据
   * $serialize:是否要序列化
   * $blocking: 是否阻塞 ， 当队列中满时，会进行阻塞，设为非阻塞会产生一个 MSG_EAGAIN 的 错误消息
   */
  $flag = msg_send($q, 111, array('a'=>1), true, false , $errorcode);
  var_dump($errorcode);
}
/**
接收消息
resource $queue , int $desiredmsgtype , int &$msgtype , int $maxsize , mixed &$message [, bool $unserialize = true [, int $flags = 0 [, int &$errorcode ]]] 
$desiredmsgtype:0表示从队列最前面开始返回数据, bigger 0:具体的某个队列
$maxsize:数据最大值，获取的消息如果》此值则出错
$msgtype:消息的具体类型, 因为$desiredmsgtype可以不指定类型，即指定为0
$flags:MSG_IPC_NOWAIT 如果队列为空直接返回（不阻塞）, MSG_EXCEPT MSG_NOERROR 参见手册
*/
$data = msg_receive($q, 0, $type, 200, $msg);
var_dump($data);
echo "\n";
var_dump($type);
echo "\n";
var_dump($msg);
echo "\n";

Queue status information: For specific reference manual

Array
(
[msg_perm.uid] => 1015
[msg_perm.gid] => 100
[msg_perm.mode] => 438
[msg_stime] => 0
[msg_rtime] => 0
[msg_ctime] => 1411830331
[msg_qnum] => 0
[msg_qbytes] => 65536
[msg_lspid] => 0
[msg_lrpid] => 0
)

Use the ipc command to view it under Linux. The ipcrm command can be deleted

Readers who are interested in more PHP-related content can check out the special topics of this site: "Introduction Tutorial on PHP Basic Syntax", "Summary of PHP Error and Exception Handling Methods", "Summary of PHP Programming Algorithms" and " PHP object-oriented programming introductory tutorial"

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