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HomeDevelopment ToolscomposerUse autoload in Composer to automatically load namespaces

下面由composer使用教程栏目为大家讲解如何使用 Composer 中的 autoload 实现自动加载命名空间,希望对需要的朋友有所帮助!

Use autoload in Composer to automatically load namespaces

使用 Composer 中的 autoload 实现自动加载命名空间

Composer 除了可以帮你安装所需要的依赖包以外,还可以实现自动加载命名空间的功能,当我们自己编写的函数库与类库需要自动加载时,我们就可以通过 composer.json 来实现。它类似于 php 中的 spl_autoload_register(), 其实如果你去查看 Composer 中的源代码,你会看到它的自动加载功能也是用了 spl_autoload_register() 这个函数

相关推荐:《Composer系列之autoload 详解

我们在 composer.json 里添加如下代码:

{
    "autoload": {
        "psr-4": {
            "Test\\": "test/",
            "Testtwo\\": "testtwo/"
        }
    }
}

这个配置文件中有一个 autoload 段,其中有个 《PSR-4》,psr-4 是一个基于 psr-4 规则的类库自动加载对应关系,只要在其后的对象中,以 ”命名空间“: “路径” 的方式写入自己的类库信息修改完成后,之后,在执行下列命令,即可完成自动加载。

composer dumpautoload

注: "psr-4": {"Test\\": "test/"} 中的 "test/" 路径为相对于 composer.json 的路径

这个时候,你就可以调用你自己编写的函数库或者类库了

<?php
require __DIR__ . &#39;/vendor/autoload.php&#39;;
$testClass = new \Test\Testclass();
?>

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