WP/DiscouragedConstants: update for PHPCS 4.0

The tokenization of (namespaced) "names" has changed in PHP 8.0, and this new tokenization will come into effect for PHP_CodeSniffer as of version 4.0.0.

This commit adds handling for the new tokenization when checking the name of a given constants to see if it is one of the discouraged constants.

Author: rodrigoprimo

WordPress/Sniffs/WP/DiscouragedConstantsSniff.php

@@ -84,7 +84,8 @@ public function process_token( $stackPtr ) {
 	}
 
 	/**
-	 * Process an arbitrary T_STRING token to determine whether it is one of the target constants.
+	 * Process an arbitrary T_STRING or T_NAME_FULLY_QUALIFIED token to determine whether it is one
+	 * of the target constants.
 	 *
 	 * @since 0.14.0
 	 *
@@ -95,6 +96,10 @@ public function process_token( $stackPtr ) {
 	public function process_arbitrary_tstring( $stackPtr ) {
 		$content = $this->tokens[ $stackPtr ]['content'];
 
+		if ( \T_NAME_FULLY_QUALIFIED === $this->tokens[ $stackPtr ]['code'] ) {
+			$content = \ltrim( $content, '\\' );
+		}
+
 		if ( ! isset( $this->discouraged_constants[ $content ] ) ) {
 			return;
 		}