Use ::class for class name

This works also for non-existing classes,
because it is resolved on compile time

Change-Id: Id3132341856fb1eb20e8b494bb4acdfe3a394db6

includes/libs/redis/RedisConnectionPool.php

@@ -80,7 +80,7 @@ class RedisConnectionPool implements LoggerAwareInterface {
 	 * @throws Exception
 	 */
 	protected function __construct( array $options, $id ) {
-		if ( !class_exists( 'Redis' ) ) {
+		if ( !class_exists( Redis::class ) ) {
 			throw new RuntimeException(
 				__CLASS__ . ' requires a Redis client library. ' .
 				'See https://www.mediawiki.org/wiki/Redis#Setup' );

includes/mail/UserMailer.php

@@ -199,7 +199,7 @@ class UserMailer {
 	private static function isMailMimeUsable() {
 		static $usable = null;
 		if ( $usable === null ) {
-			$usable = class_exists( 'Mail_mime' );
+			$usable = class_exists( Mail_mime::class );
 		}
 		return $usable;
 	}
@@ -213,7 +213,7 @@ class UserMailer {
 	private static function isMailUsable() {
 		static $usable = null;
 		if ( $usable === null ) {
-			$usable = class_exists( 'Mail' );
+			$usable = class_exists( Mail::class );
 		}
 
 		return $usable;

includes/resourceloader/ResourceLoader.php

@@ -1912,7 +1912,7 @@ MESSAGE;
 		// When called from the installer, it is possible that a required PHP extension
 		// is missing (at least for now; see T49564). If this is the case, throw an
 		// exception (caught by the installer) to prevent a fatal error later on.
-		if ( !class_exists( 'Less_Parser' ) ) {
+		if ( !class_exists( Less_Parser::class ) ) {
 			throw new MWException( 'MediaWiki requires the less.php parser' );
 		}
 

maintenance/checkLess.php

@@ -43,7 +43,7 @@ class CheckLess extends Maintenance {
 		self::requireTestsAutoloader();
 
 		// If phpunit isn't available by autoloader try pulling it in
-		if ( !class_exists( 'PHPUnit\\Framework\\TestCase' ) ) {
+		if ( !class_exists( PHPUnit\Framework\TestCase::class ) ) {
 			require_once 'PHPUnit/Autoload.php';
 		}
 

tests/phpunit/includes/api/RandomImageGenerator.php

@@ -114,7 +114,7 @@ class RandomImageGenerator {
 		} else {
 			// figure out how to write images
 			global $wgExiv2Command;
-			if ( class_exists( 'Imagick' ) && $wgExiv2Command && is_executable( $wgExiv2Command ) ) {
+			if ( class_exists( Imagick::class ) && $wgExiv2Command && is_executable( $wgExiv2Command ) ) {
 				return 'writeImageWithApi';
 			} elseif ( $wgUseImageMagick
 				&& $wgImageMagickConvertCommand

tests/phpunit/includes/debug/logger/LegacyLoggerTest.php

@@ -166,7 +166,7 @@ class LegacyLoggerTest extends MediaWikiIntegrationTestCase {
 			],
 		];
 
-		if ( class_exists( '\Monolog\Logger' ) ) {
+		if ( class_exists( \Monolog\Logger::class ) ) {
 			$tests[] = [
 				\Monolog\Logger::INFO,
 				$dest + [ 'level' => LogLevel::INFO ],

tests/phpunit/languages/LanguageIntegrationTest.php

@@ -2066,7 +2066,7 @@ class LanguageIntegrationTest extends LanguageClassesTestCase {
 	 * @covers Language::isKnownLanguageTag
 	 */
 	public function testIsKnownLanguageTag_cldr() {
-		if ( !class_exists( 'LanguageNames' ) ) {
+		if ( !class_exists( LanguageNames::class ) ) {
 			$this->markTestSkipped( 'The LanguageNames class is not available. '
 				. 'The CLDR extension is probably not installed.' );
 		}

tests/phpunit/phpunit.php

@@ -331,7 +331,7 @@ class PHPUnitMaintClass {
 
 		$this->forceFormatServerArgv();
 
-		if ( !class_exists( 'PHPUnit\\Framework\\TestCase' ) ) {
+		if ( !class_exists( PHPUnit\Framework\TestCase::class ) ) {
 			echo "PHPUnit not found. Please install it and other dev dependencies by
 		running `composer install` in MediaWiki root directory.\n";
 			exit( 1 );