A GraphQL type must be provided, which will be used to interpret different
GraphQL Value literals.
Returns null when the value could not be validly coerced according to
the provided type.
| GraphQL Value | PHP Value |
| -------------------- | ------------- |
| Input Object | Assoc Array |
| List | Array |
| Boolean | Boolean |
| String | String |
| Int / Float | Int / Float |
| Enum Value | Mixed |
| Null Value | stdClass | instance of NullValue::getNullValue()
/**
* Given a variable definition, and any value of input, return a value which
* adheres to the variable definition, or throw an error.
*/
private static function getVariableValue(Schema $schema, VariableDefinition $definitionAST, $input)
{
$type = Utils\TypeInfo::typeFromAST($schema, $definitionAST->type);
$variable = $definitionAST->variable;
if (!$type || !Type::isInputType($type)) {
$printed = Printer::doPrint($definitionAST->type);
throw new Error("Variable \"\${$variable->name->value}\" expected value of type " . "\"{$printed}\" which cannot be used as an input type.", [$definitionAST]);
}
$inputType = $type;
$errors = self::isValidPHPValue($input, $inputType);
if (empty($errors)) {
if (null === $input) {
$defaultValue = $definitionAST->defaultValue;
if ($defaultValue) {
return Utils\AST::valueFromAST($defaultValue, $inputType);
}
}
return self::coerceValue($inputType, $input);
}
if (null === $input) {
$printed = Printer::doPrint($definitionAST->type);
throw new Error("Variable \"\${$variable->name->value}\" of required type " . "\"{$printed}\" was not provided.", [$definitionAST]);
}
$message = $errors ? "\n" . implode("\n", $errors) : '';
$val = json_encode($input);
throw new Error("Variable \"\${$variable->name->value}\" got invalid value " . "{$val}.{$message}", [$definitionAST]);
}
/**
* @deprecated as of 8.0 (Moved to Utils\AST::valueFromAST)
*
* @param $valueNode
* @param InputType $type
* @param null $variables
* @return array|null|\stdClass
*/
public static function valueFromAST($valueNode, InputType $type, $variables = null)
{
return Utils\AST::valueFromAST($valueNode, $type, $variables);
}
/**
* @it rejects empty input
*/
public function testRejectsEmptyInput()
{
$this->assertEquals(Utils::undefined(), AST::valueFromAST(null, Type::boolean()));
}