没有作曲家的PSR4自动加载 [英] PSR4 auto load without composer
问题描述
我在一个使用composer自动加载的项目中有一个软件包,composer.json条目如下:
I have one package in a project which is autoloaded using composer and composer.json entry is as follows :
"autoload": {
"psr-4": {
"CompanyName\\PackageName\\": "packages/package-folder/src/"
}
}
现在,我将其复制到另一个未使用composer的项目中.我如何在这里自动加载相同的软件包?
Now I am copying this over to another project which is not using composer. How can I autoload this same package there ?
推荐答案
您必须阅读作曲家并为定义在composer.json
中的每个命名空间自己加载类.
You have to read the composer and load the classes yourself for each namespaces defined into the composer.json
.
方法如下:
function loadPackage($dir)
{
$composer = json_decode(file_get_contents("$dir/composer.json"), 1);
$namespaces = $composer['autoload']['psr-4'];
// Foreach namespace specified in the composer, load the given classes
foreach ($namespaces as $namespace => $classpaths) {
if (!is_array($classpaths)) {
$classpaths = array($classpaths);
}
spl_autoload_register(function ($classname) use ($namespace, $classpaths, $dir) {
// Check if the namespace matches the class we are looking for
if (preg_match("#^".preg_quote($namespace)."#", $classname)) {
// Remove the namespace from the file path since it's psr4
$classname = str_replace($namespace, "", $classname);
$filename = preg_replace("#\\\\#", "/", $classname).".php";
foreach ($classpaths as $classpath) {
$fullpath = $dir."/".$classpath."/$filename";
if (file_exists($fullpath)) {
include_once $fullpath;
}
}
}
});
}
}
loadPackage(__DIR__."/vendor/project");
new CompanyName\PackageName\Test();
当然,我不知道您在PackageName中拥有的类.
/vendor/project
是您的外部库的克隆或下载位置.这是您拥有composer.json
文件的地方.
Of course, I don't know the classes you have in the PackageName.
The /vendor/project
is where your external library was cloned or downloaded. This is where you have the composer.json
file.
注意:这仅适用于psr4自动加载.
Note: this works only for psr4 autoload.
编辑:为一个名称空间添加对多个类路径的支持
EDIT : Adding support for multiple classpaths for one namespace
EDIT2 :我创建了一个 Github存储库来处理此代码,如果有人想对其进行改进.
EDIT2 : I created a Github repo to handle this code, if anyone wants to improve it.
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