Question

伙计我使用spl_autoload_register功能遇到问题。我在其XAMPP目录中htdocs使用的是另一个名为boot的目录。该目录有2个文件Car class文件，只有Main个php文件。该课程使用namespace boot。我想通过使用此函数spl_autoload_register加载该类，但错误就是这样。我做错了什么。

Warning: require(boot\Car.php): failed to open stream: No such file or directory in C:\xampp\htdocs\boot\Main.php

Code Car.php

<?php
namespace boot;

class Car
{

    public function __construct()
    {
        echo 'Constructor has been created!';
    }
}

代码Main.php

<?php
spl_autoload_register(function ($className){
    require $className  . '.php';
});

use boot\Car;
$car = new Car;

Answer 1

几个例子：

目录结构：

project folder
- Main.php
- Car.php
- Test.php
- Foo
- - Bar.php
- - Baz
- - - Qux.php

test.php的

class Test {}

富\ Bar.php

namespace boot\Foo;
class Bar {}

富\巴兹\ Qux.php

namespace Foo\Baz;
class Qux {}

Main.php

//__DIR__ === C:\xampp\htdocs\boot    

spl_autoload_register(function ($className){
    //__DIR__ . DIRECTORY_SEPARATOR .
    require_once preg_replace('/^[\\\\\/]?boot[\\\\\/]?/', '', $className). '.php';
});

// both require same file but namespace must be same as defined in file
$t = new boot\Car; // work
$t = new Car; // do not work because in Car.php is namespace `boot`
// required file: C:\xampp\htdocs\boot\Car.php

// both require same file but namespace must be same as defined in file
$t = new boot\Test; // do not work because in Test.php is no namespace 
$t = new Test; //work
// required file: C:\xampp\htdocs\boot\Test.php

// both require same file but namespace must be same as defined in file
$t = new boot\Foo\Bar; // work
$t = new Foo\Bar; // do not work because in Bar.php is namespace `boot\Foo`
// required file: C:\xampp\htdocs\boot\Foo\Bar.php

// both require same file but namespace must be same as defined in file
$t = new boot\Foo\Baz\Qux; // do not work because in Qux.php is namespace `Foo\Baz`
$t = new Foo\Baz\Qux; // work
// required file: C:\xampp\htdocs\boot\Foo\Baz\Qux.php

PHP spl_autoload_register（）不会打开名称空间为

1 个答案: