src/Validator/DocumentValidator.php
public static function validate(
        Schema $schema,
        DocumentNode $ast,
        ?array $rules = null,
        ?TypeInfo $typeInfo = null
    ) {
        if ($rules === null) {
            $rules = static::allRules();
        }

        if (is_array($rules) === true && count($rules) === 0) {
            // Skip validation if there are no rules
            return [];
        }

        $typeInfo = $typeInfo ?: new TypeInfo($schema);

        return static::visitUsingRules($schema, $typeInfo, $ast, $rules);
    }
public static function validate(
        Schema $schema,
        DocumentNode $ast,
        ?array $rules = null,
        ?TypeInfo $typeInfo = null
    ) {
        if ($rules === null) {
            $rules = static::allRules();
        }

        if (is_array($rules) === true && count($rules) === 0) {
            // Skip validation if there are no rules
            return [];
        }

        $typeInfo = $typeInfo ?: new TypeInfo($schema);

        return static::visitUsingRules($schema, $typeInfo, $ast, $rules);
    }
Primary method for query validation. See class description for details.

@param ValidationRule[]|null $rules

@return Error[]

@api