(PHP 7)
ReflectionType::isBuiltin — Checks if it is a built-in type
public ReflectionType::isBuiltin ( ) : bool
Checks if the type is a built-in type in PHP.
This function has no parameters.
true if it's a built-in type, otherwise false
Example #1 ReflectionType::isBuiltin() example
<?php
class SomeClass {}
function someFunction(string $param, SomeClass $param2, StdClass $param3) {}
$reflectionFunc = new ReflectionFunction('someFunction');
$reflectionParams = $reflectionFunc->getParameters();
var_dump($reflectionParams[0]->getType()->isBuiltin());
var_dump($reflectionParams[1]->getType()->isBuiltin());
var_dump($reflectionParams[2]->getType()->isBuiltin()); The above example will output something similar to:
bool(true) bool(false) bool(false)
Note that the ReflectionType::isBuiltin() method does not distinguish between internal and custom classes. To make this distinction, the ReflectionClass::isInternal() method should be used on the returned class name.
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https://www.php.net/manual/en/reflectiontype.isbuiltin.php