check php version in main.php

composer.json

@@ -1,6 +1,5 @@
 {
     "require": {
-        "php": ">=7.4",
         "ext-mbstring": "*"
     },
     "require-dev": {},

core/Config.php

@@ -41,20 +41,6 @@ public static function init ( $main_file ) {
 		$data = \get_file_data( $main_file, [ 'Plugin Name', 'Version' ] );
 		self::$values[ 'NAME' ] = __( $data[0], 'your_text_domain' );
 		self::$values[ 'VERSION' ] = $data[1];
-
-		if ( \file_exists( $root . '/composer.json' ) ) {
-			$json_raw = \file_get_contents( $root . '/composer.json' );
-			$composer = \json_decode( $json_raw );
-			$php_version = null;
-			try {
-				$php_version = $composer ? $composer->require->php : false;
-			} catch ( \Throwable $e ) {
-			}
-			if ( $php_version ) {
-				$php_version = \preg_replace( '/[^0-9\.]/', '', $php_version );
-				self::$values[ 'REQUIRED_PHP_VERSION' ] = $php_version;
-			}
-		}
 	}
 
 	public static function set ( $key, $value ) {

main.php

@@ -32,12 +32,31 @@
 // load_plugin_textdomain( 'your_text_domain', false, dirname( plugin_basename( __FILE__ ) ) . '/languages/' );
 
 try {
+	// Check PHP Version
+	$php_expected = '7.4';
+	$php_current = PHP_VERSION;
+	if ( version_compare( $php_current, $php_expected, '<' ) ) {
+		throw new Error(
+			sprintf(
+				// translators: the %s are PHP versions
+				esc_html__( "This plugin requires PHP version %s or later (your server PHP version is %s)", 'your_text_domain' ),
+				$php_expected, esc_html( $php_current )
+			)
+		);
+	}
+
 	// check composer autoload
-	$composer_autoload = __DIR__ . '/vendor/autoload.php';
-	if ( ! file_exists( $composer_autoload ) ) {
-		throw new \Error( $composer_autoload . ' does not exist' );
+	$autoload = __DIR__ . '/vendor/autoload.php';
+	if ( ! file_exists( $autoload ) ) {
+		throw new Error(
+			sprintf(
+				// translators: %s is the `composer install` command
+				esc_html__( 'Missing Composer autoload. You need run %s.', 'your_text_domain' ),
+				'<code>composer install</code>'
+			)
+		);
 	}
-	include_once $composer_autoload;
+	include_once $autoload;
 } catch ( Throwable $e ) {
 	return add_action( 'admin_notices', function () use ( $e ) {
 		if ( ! current_user_can( 'install_plugins' ) ) return;