examples/01-blog/Blog/Type/Scalar/UrlType.php
public function parseLiteral($valueNode, array $variables = null)
    {
        // Note: throwing GraphQL\Error\Error vs \UnexpectedValueException to benefit from GraphQL
        // error location in query:
        if (!($valueNode instanceof StringValueNode)) {
            throw new Error('Query error: Can only parse strings got: ' . $valueNode->kind, [$valueNode]);
        }
        if (!is_string($valueNode->value) || !filter_var($valueNode->value, FILTER_VALIDATE_URL)) {
            throw new Error('Query error: Not a valid URL', [$valueNode]);
        }
        return $valueNode->value;
    }
public function parseLiteral($valueNode, array $variables = null)
    {
        // Note: throwing GraphQL\Error\Error vs \UnexpectedValueException to benefit from GraphQL
        // error location in query:
        if (!($valueNode instanceof StringValueNode)) {
            throw new Error('Query error: Can only parse strings got: ' . $valueNode->kind, [$valueNode]);
        }
        if (!is_string($valueNode->value) || !filter_var($valueNode->value, FILTER_VALIDATE_URL)) {
            throw new Error('Query error: Not a valid URL', [$valueNode]);
        }
        return $valueNode->value;
    }
public function parseLiteral ( $ valueNode , array $ variables = null ) { // Note: throwing GraphQL\Error\Error vs \UnexpectedValueException to benefit from GraphQL // error location in query: if ( ! ( $ valueNode instanceof StringValueNode ) ) { throw new Error ( 'Query error: Can only parse strings got: ' . $ valueNode -> kind , [ $ valueNode ] ) ; } if ( ! is_string ( $ valueNode -> value ) || ! filter_var ( $ valueNode -> value , FILTER_VALIDATE_URL ) ) { throw new Error ( 'Query error: Not a valid URL' , [ $ valueNode ] ) ; } return $ valueNode -> value ; }
Parses an externally provided literal value to use as an input (e.g. in Query AST)

@param Node $valueNode
@param array|null $variables
@return null|string
@throws Error
Parses an externally provided literal value to use as an input ( e . g . in Query AST )