What are the PHP function version compatibility query tools?

PHP Function Version Compatibility Query Tool: PHP.net Function Reference: Provides compatibility information for each function, including first introduction and changed/deprecated versions. Packagist: Check package support in different PHP versions. PHPCompatibility: Identify incompatible code and provide fix recommendations through static analysis and runtime testing. Version Compatibility Checker: Online tool, enter function name and target PHP version to get compatibility information.

PHP function version compatibility query tool

Introduction

Developed in PHP , it is important to understand the compatibility of PHP functions across different versions. To simplify this process, the PHP community has developed several tools that help developers query the availability of functions and their changes across versions.

Tools

1. PHP.net function reference

The most comprehensive PHP function reference is the PHP.net official document . Each function page contains detailed compatibility information, including the version in which the function was first introduced and which versions were changed or deprecated in each PHP version.

// 检查函数版本兼容性
if (function_exists('mb_convert_encoding')) {
    // 函数存在于当前 PHP 版本中
}

2. Packagist

Packagist is a PHP package repository. It provides a version compatibility checking tool that allows developers to check the support of packages in different PHP versions.

composer check-platform-reqs Acme/package

3. PHPCompatibility

PHPCompatibility is a popular tool for checking version compatibility of PHP code. It identifies incompatible code through static analysis and runtime testing and provides fix recommendations.

phpcompat check --date 2019-01-01 <your_script>

4. Version Compatibility Checker

Version Compatibility Checker is an online tool that allows developers to check function version compatibility. It provides a simple interface where developers can enter the function name and target PHP version to get compatibility information.

https://www.phpcompatibility.com/versionchecker

Practical case

Consider the following scenario:

• You are developing a PHP script that uses the mb_convert_encoding function .
• You want to make sure your script is compatible on PHP 5.3 and above.

Solution:

1. Use PHP.net Function Reference or Version Compatibility Checker to check whether the mb_convert_encoding function is in PHP 5.3 or later.
2. Based on compatibility information, update code to use equivalent functions or libraries supported by PHP 5.3.

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