Fix

Author: VincentLanglet

src/Type/Php/FilterVarThrowTypeExtension.php

@@ -30,9 +30,7 @@ public function isFunctionSupported(
 		FunctionReflection $functionReflection,
 	): bool
 	{
-		return $functionReflection->getName() === 'filter_var'
-			&& $this->phpVersion->hasFilterThrowOnFailureConstant()
-			&& $this->reflectionProvider->hasConstant(new Name\FullyQualified('FILTER_THROW_ON_FAILURE'), null);
+		return $functionReflection->getName() === 'filter_var';
 	}
 
 	public function getThrowTypeFromFunctionCall(
@@ -45,6 +43,13 @@ public function getThrowTypeFromFunctionCall(
 			return null;
 		}
 
+		if (
+			!$this->phpVersion->hasFilterThrowOnFailureConstant()
+			|| !$this->reflectionProvider->hasConstant(new Name\FullyQualified('FILTER_THROW_ON_FAILURE'), null)
+		) {
+			return null;
+		}
+
 		$flagsExpr = $funcCall->getArgs()[3]->value;
 		$flagsType = $scope->getType($flagsExpr);