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This article mainly introduces the relevant knowledge of "what does PSR-4 mean in php". The editor shows you the operation process through an actual case. The operation method is simple and fast, and it is practical. I hope this article "what does PSR-4 mean in php" can help you solve the problem.

Description

1. PSR-4 standardizes the specified file path to automatically load classes and the location of files to be loaded automatically.

2. Under the key of PSR-4, you can define the mapping relationship between namespace and path.

When you automatically load a class such as Foo\\ Bar\\ Baz, the namespace Foo points to a directory named src/, which means that the autoloader will look for a file named src/Bar/Baz.php and reference it.

Example

{"autoload": {"psr-4": {"App\\": "App/" / / Namespace App mapping to directory App}} what are the PHP development environment building tools? phpStudy is the most commonly used development environment for beginners.

Second, WampServer,WampServer is also as simple as phpStudy and more friendly to rookies.

3. XAMPP,XAMPP (Apache+MySQL+PHP+PERL) is a powerful integrated software package for building stations.

4. MAMP,MAMP is divided into two types: MAMP and MAMP Pro for Mac.

Pagoda panel, pagoda panel is a server management software that supports windows and linux systems. 6. UPUPW,UPUPW is the most characteristic Web server PHP suite under the Windows platform.

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