我如何在 php 多线程中使用静态方法

Question

我在使用 php 多线程时遇到了一些问题，这是我的代码

<?php
class testClass {
    const TEST           = 'UTF-8';
    public static $test1 = array(
    'key' => 'value',
    );
    public static function test2() {
        return "this is static func";
    }
}
class My extends Thread {
    public static $test3;
    public static $test4 = "this is test4 string";
    public function __construct() {
        echo "main start\n";
        self::$test3 = new DateTime();
        var_dump(testClass::TEST);
        var_dump(testClass::$test1);
        var_dump(testClass::test2());
        var_dump(self::$test3);
        var_dump(self::$test4);
        echo "main end\n\n\n\n";
    }
    public function run() {
        echo "sub start\n";
        var_dump(testClass::TEST);
        var_dump(testClass::$test1);
        var_dump(testClass::test2());
        var_dump(self::$test3);
        var_dump(self::$test4);
        echo "sub end\n\n";
    }
}
$my = new My();
$my->start();
?>

和结果

#main start
string(5) "UTF-8"
array(1) {
  ["key"]=>
  string(5) "value"
}
string(19) "this is static func"
object(DateTime)#2 (3) {
  ["date"]=>
  string(26) "2015-05-16 23:26:19.000000"
  ["timezone_type"]=>
  int(3)
  ["timezone"]=>
  string(3) "PRC"
}
string(20) "this is test4 string"
#main end

#sub start
string(5) "UTF-8"
NULL
string(19) "this is static func"
NULL
string(20) "this is test4 string"
#sub end

在这个结果中，可以看到静态String变量可以从子Thread中获取值，但是DateTime对象不是

子线程调用testClass::TEST可以获取到值，但是调用testClass::$test1就不行

我的 PHP 版本 => 5.6.8 配置'--enable-maintainer-zts'

我无计可施，非常感谢任何帮助

Answer 1

来自pthreads introduction：

Static Members: When a new context is created ( Thread or Worker ), they are generally copied, but resources and objects with internal state are nullified (for safety reasons). This allows them to function as a kind of thread local storage. For example, upon starting the context, a class whose static members include connection information for a database server, and the connection itself, will only have the simple connection information copied, not the connection. Allowing the new context to initiate a connection in the same way as the context that created it, storing the connection in the same place without affecting the original context.

因此您必须在每个线程中从头开始创建静态 objects/resources。

注意：这也适用于 arrays。

我如何在 php 多线程中使用静态方法

how can i use static method in php multi thread

php

multithreading

pthreads