Question

您好我正在尝试为我的应用制作一个简单的配置文件我的项目文件夹是：内部文件夹'app' -Config.php 在根目录中： -index.php -config.php

这就是config.php的样子：

<?php  
return [
    'db' => [
        'hosts' => [
            'local' => 'localhost',
            'externo' => '1.1.1.1',
        ],
        'name' => 'db-stats',
        'user' => 'root',
        'password' => 'root'
    ],
    'mail' => [
        'host' => 'smtp.gmail.com'
    ]
];

?>

Config.php是：

<?php 
namespace Project\Helpers;
class Config
{
    protected $data;
    protected $default = null;
    public function load($file){
        $this->$data = require $file;
    }
    public function get($key, $default = null){
        $this->$default = $default;
        $segments = explode('.', $key);
        $data = $this->$data;

        foreach ($segments as $segment) {
            if(isset($data[$segment])){
                $data = $data[$segment];
            }else{
                $data = $this->$default;
                break;
            }
        }
        return $data;
    }
    public function exists($key){
        return $this->get($key) !== $this->$default;
    }
}
?>

最后是index.php：

<?php 

use Project\Helpers\Config;
require 'app/Config.php';

$config = new Config;
$config->load('config.php');

echo $config->get('db.hosts.local');

?>

问题是我在运行页面时遇到了这两个错误：

注意：未定义的变量：数据输入   第11行的C：\ xampp \ htdocs \ probar \ app \ Config.php

致命错误：无法访问空属性   第11行的C：\ xampp \ htdocs \ probar \ app \ Config.php

请帮我解决这个问题???

Answer 1

$this->default = $default;不 ~~$ this-＆gt; $ data = require $ file;~~ 。

而<?php namespace Project\Helpers; class Config { protected $data; protected $default = null; public function load($file){ $this->data = require $file; } public function get($key, $default = null){ $this->default = $default; $segments = explode('.', $key); $data = $this->data; foreach ($segments as $segment) { if(isset($data[$segment])){ $data = $data[$segment]; }else{ $data = $this->default; break; } } return $data; } public function exists($key){ return $this->get($key) !== $this->default; } }代替 ~~$ this-＆gt; $ default = $ default;~~

否则这些将是variable variables。

if (ChooseColor(&cc) == TRUE) {
    HBRUSH hbrush = CreateSolidBrush(cc.rgbResult);
    HBRUSH hOldBrush = (HBRUSH)SetClassLongPtr(hWnd, GCLP_HBRBACKGROUND, (LONG_PTR)hbrush);

    DeleteObject(hOldBrush);
    InvalidateRect(hWnd, NULL, 1);
}

Answer 2

类构造函数中存在synthax错误。在PHP中，当您使用->运算符访问成员属性时，您不必使用$修饰符。

正确的代码如下所示：

<?php
namespace Project\Helpers;
class Config
{
    protected $data;
    protected $default = null;
    public function load($file){
        $this->data = require $file;
    }
    public function get($key, $default = null){
        $this->default = $default;
        $segments = explode('.', $key);
        $data = $this->data;

        foreach ($segments as $segment) {
            if(isset($data[$segment])){
                $data = $data[$segment];
            }else{
                $data = $this->default;
                break;
            }
        }
        return $data;
    }
    public function exists($key){
        return $this->get($key) !== $this->default;
    }
}

这个PHP配置文件出错

2 个答案: