Update AttributeRequiresPhpVersionRule.php

Author: staabm

src/Rules/PHPUnit/AttributeRequiresPhpVersionRule.php

@@ -77,19 +77,20 @@ public function processNode(Node $node, Scope $scope): array
 				continue;
 			}
 
+			$versionRequirement = $args[0];
 			if (
-				!is_numeric($args[0])
+				!is_numeric($versionRequirement)
 			) {
 				try {
 					// check composer like version constraints, e.g. ^1  or ~2
-					$testPhpVersionConstraint = $parser->parse($args[0]);
+					$testPhpVersionConstraint = $parser->parse($versionRequirement);
 
 					if ($testPhpVersionConstraint->complies($this->phpstanPhpVersion)) {
 						continue;
 					}
 				} catch (UnsupportedVersionConstraintException $e) {
 					// test php-src builtin operators as in version_compare()
-					if (preg_match(self::VERSION_COMPARISON, $args[0], $matches) <= 0) {
+					if (preg_match(self::VERSION_COMPARISON, $versionRequirement, $matches) <= 0) {
 						$errors[] = RuleErrorBuilder::message(
 							sprintf($e->getMessage()),
 						)