Drop support for PHP < 7.2

This commit is a plain version drop.

This commit does **not** include:
* Removing any work-arounds which _may_ exist in the codebase, to support PHP < 7.2.
* Modernizing the codebase.

These things can be addressed at will in follow up PRs.

Fixes 2606

Author: jrfnl

.github/CONTRIBUTING.md

@@ -65,7 +65,7 @@ When you introduce new `public` sniff properties, or your sniff extends a class
 * PHP_CodeSniffer 3.13.0 or higher
 * PHPCSUtils 1.1.0 or higher
 * PHPCSExtra 1.4.0 or higher
-* PHPUnit 4.x - 9.x
+* PHPUnit 8.x - 9.x
 
 The WordPress Coding Standards use the `PHP_CodeSniffer` native unit test framework for unit testing the sniffs.
 

.github/workflows/quicktest.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php: [ '5.4', 'latest' ]
+        php: [ '7.2', 'latest' ]
         dependencies: [ 'lowest', 'stable' ]
 
     name: QTest - PHP ${{ matrix.php }} on PHPCS ${{ matrix.dependencies }}

.github/workflows/unit-tests.yml

@@ -26,23 +26,23 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php: [ '5.5', '5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.5' ]
+        php: [ '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.5' ]
         dependencies: [ 'lowest', 'stable' ]
         extensions: [ '' ]
         coverage: [false]
 
         include:
-          - php: '7.2'
+          - php: '8.1'
             dependencies: 'stable'
             extensions: ':mbstring' # = Disable Mbstring.
             coverage: true # Make sure coverage is recorded for this too.
 
           # Run code coverage builds against high/low PHP and high/low PHPCS.
-          - php: '5.4'
+          - php: '7.2'
             dependencies: 'stable'
             extensions: ''
             coverage: true
-          - php: '5.4'
+          - php: '7.2'
             dependencies: 'lowest'
             extensions: ''
             coverage: true
@@ -56,15 +56,11 @@ jobs:
             coverage: true
 
           # Test against dev versions of all dependencies with select PHP versions for early detection of issues.
-          - php: '5.4'
-            dependencies: 'dev'
-            extensions: ''
-            coverage: false
-          - php: '7.0'
+          - php: '7.2'
             dependencies: 'dev'
             extensions: ''
             coverage: false
-          - php: '7.4'
+          - php: '8.1'
             dependencies: 'dev'
             extensions: ''
             coverage: false

.phpcs.xml.dist

@@ -50,24 +50,13 @@
 
 		<!-- Linting is done in a separate CI job, no need to duplicate it. -->
 		<exclude name="Generic.PHP.Syntax"/>
-
-		<!-- WordPressCS still has a PHP 5.4 minimum. -->
-		<exclude name="Modernize.FunctionCalls.Dirname"/>
 	</rule>
 
 	<!-- Check code for cross-version PHP compatibility. -->
-	<config name="testVersion" value="5.4-"/>
+	<config name="testVersion" value="7.2-"/>
 	<rule ref="PHPCompatibility">
 		<!-- Exclude PHP constants back-filled by PHPCS. -->
-		<exclude name="PHPCompatibility.Constants.NewConstants.t_finallyFound"/>
-		<exclude name="PHPCompatibility.Constants.NewConstants.t_yieldFound"/>
-		<exclude name="PHPCompatibility.Constants.NewConstants.t_ellipsisFound"/>
-		<exclude name="PHPCompatibility.Constants.NewConstants.t_powFound"/>
-		<exclude name="PHPCompatibility.Constants.NewConstants.t_pow_equalFound"/>
-		<exclude name="PHPCompatibility.Constants.NewConstants.t_spaceshipFound"/>
-		<exclude name="PHPCompatibility.Constants.NewConstants.t_coalesceFound"/>
 		<exclude name="PHPCompatibility.Constants.NewConstants.t_coalesce_equalFound"/>
-		<exclude name="PHPCompatibility.Constants.NewConstants.t_yield_fromFound"/>
 		<exclude name="PHPCompatibility.Constants.NewConstants.t_readonlyFound"/>
 	</rule>
 

README.md

@@ -10,7 +10,7 @@
 [![codecov.io](https://codecov.io/gh/WordPress/WordPress-Coding-Standards/graph/badge.svg?token=UzFYn0RzVG&branch=develop)](https://codecov.io/gh/WordPress/WordPress-Coding-Standards?branch=develop)
 
 [![Minimum PHP Version](https://img.shields.io/packagist/php-v/wp-coding-standards/wpcs.svg?maxAge=3600)](https://packagist.org/packages/wp-coding-standards/wpcs)
-[![Tested on PHP 5.4 to 8.4](https://img.shields.io/badge/tested%20on-PHP%205.4%20|%205.5%20|%205.6%20|%207.0%20|%207.1%20|%207.2%20|%207.3%20|%207.4%20|%208.0%20|%208.1%20|%208.2%20|%208.3%20|%208.4-green.svg?maxAge=2419200)](https://github.com/WordPress/WordPress-Coding-Standards/actions/workflows/unit-tests.yml)
+[![Tested on PHP 7.2 to 8.4](https://img.shields.io/badge/tested%20on-PHP%207.2%20|%207.3%20|%207.4%20|%208.0%20|%208.1%20|%208.2%20|%208.3%20|%208.4-green.svg?maxAge=2419200)](https://github.com/WordPress/WordPress-Coding-Standards/actions/workflows/unit-tests.yml)
 
 [![License: MIT](https://poser.pugx.org/wp-coding-standards/wpcs/license)](https://github.com/WordPress/WordPress-Coding-Standards/blob/develop/LICENSE)
 [![Total Downloads](https://poser.pugx.org/wp-coding-standards/wpcs/downloads)](https://packagist.org/packages/wp-coding-standards/wpcs/stats)
@@ -53,7 +53,7 @@ This project is a collection of [PHP_CodeSniffer](https://github.com/PHPCSStanda
 ## Minimum Requirements
 
 The WordPress Coding Standards package requires:
-* PHP 5.4 or higher with the following extensions enabled:
+* PHP 7.2 or higher with the following extensions enabled:
     - [Filter](https://www.php.net/book.filter)
     - [libxml](https://www.php.net/book.libxml)
     - [Tokenizer](https://www.php.net/book.tokenizer)

composer.json

@@ -16,7 +16,7 @@
 		}
 	],
 	"require": {
-		"php": ">=5.4",
+		"php": ">=7.2",
 		"ext-filter": "*",
 		"ext-libxml": "*",
 		"ext-tokenizer": "*",
@@ -27,7 +27,7 @@
 	},
 	"require-dev": {
 		"phpcompatibility/php-compatibility": "^9.0",
-		"phpunit/phpunit": "^4.0 || ^5.0 || ^6.0 || ^7.0 || ^8.0 || ^9.0",
+		"phpunit/phpunit": "^8.0 || ^9.0",
 		"phpcsstandards/phpcsdevtools": "^1.2.0",
 		"php-parallel-lint/php-parallel-lint": "^1.4.0",
 		"php-parallel-lint/php-console-highlighter": "^1.0.0"

phpstan.neon.dist

@@ -1,5 +1,5 @@
 parameters:
-    phpVersion: 70100 # Needs to be 70100 or higher... sigh...
+    phpVersion: 70200
     level: 5
     paths:
         - WordPress

phpunit.xml.dist

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit
 	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/6.3/phpunit.xsd"
+	xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/8.5/phpunit.xsd"
 	backupGlobals="true"
 	bootstrap="./Tests/bootstrap.php"
 	convertErrorsToExceptions="true"