这是什么意思? “解析错误:语法错误，意外的T_PAAMAYIM_NEKUDOTAYIM"； [英] What does this mean? "Parse error: syntax error, unexpected T_PAAMAYIM_NEKUDOTAYIM"

问题描述

T_PAAMAYIM_NEKUDOTAYIM听起来真的很异国情调，但对我来说绝对是胡说八道.我将其全部追溯到以下代码行:

T_PAAMAYIM_NEKUDOTAYIM sounds really exotic, but most certainly absolutely nonsense to me. I traced it all down to this lines of code:

<?php
Class Context {
    protected $config;

    public function getConfig($key) { // Here's the problem somewhere...
    $cnf = $this->config;
    return $cnf::getConfig($key);
    }

    function __construct() {
    $this->config = new Config();
    }
}
?>

在构造函数中，我创建一个Config对象.这是课程:

In the constructor I create a Config object. Here's the class:

final class Config {
    private static $instance = NULL;
    private static $config;

    public static function getConfig($key) {
    return self::$config[$key];
    }

    public static function getInstance() {
    if (!self::$instance) {
        self::$instance = new Config();
    }
    return self::$instance;
    }

    private function __construct() {
    // include configuration file
    include __ROOT_INCLUDE_PATH . '/sys/config/config.php'; // defines a $config array
    $this->config = $config;
    }
}

不知道为什么这不起作用/错误是什么意思...

No idea why this doesnt work / what the error means...

推荐答案

T_PAAMAYIM_NEKUDOTAYIM是PHP使用的双冒号范围解析-::

T_PAAMAYIM_NEKUDOTAYIM is the double colon scope resolution thingy PHP uses - ::

快速浏览一下您的代码，我认为这一行:

Quick glance at your code, I think this line:

return $cnf::getConfig($key);

应该是

return $cnf->getConfig($key);

第一种是静态调用方法的方法-如果$ cnf包含一个也是有效类的字符串，则此代码将有效. ->语法用于在类/对象的实例上调用方法.

The first is the way to call a method statically - this code would be valid if $cnf contained a string that was also a valid class. The -> syntax is for calling a method on an instance of a class/object.

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