Detailed explanation of usage of autoload method implementation in Laravel

This article will explain to you how to implement autoload in laravel? After analysis, I found that it is really clever. Let me give you a detailed explanation below.

After using Laravel for a while, I found that there are very few include and require. I thought it was a bit strange. I thought about how Laravel completes file import. .

In fact, Laravel still uses include or require, but they are all written in a function.

Like this:

function autoload($path){
	require_once($path);
}

Generally, there are more than one or two PHP files imported each time, there will be many, so an array must be defined to store " "Mapping relationship between classes and PHP files", like this:

$classmap=[
		'DB'=>'api.php',
		'FileSystem'=>'api.php',
		'Session'=>'api.php'
];

Then, traverse the array, don't write a for loop anymore, just use an elegant function solve.

array_map("autoload",$classmap);

Let’s take a look at how Laravel actually defines this array. The mapping file is in autoload_classmap.php of \vendor\composer

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