ReflectionParameter::getType

(PHP 7)

ReflectionParameter::getType — Gets a parameter's type

说明

public ReflectionParameter::getType ( void ) : ReflectionType

Gets the associated type of a parameter.

参数

此函数没有参数。

返回值

Returns a ReflectionType object if a parameter type is specified, NULL otherwise.

范例

Example #1 ReflectionParameter::getType() Usage as of PHP 7.1.0

As of PHP 7.1.0, ReflectionType::__toString() is deprecated, and ReflectionParamater::getType() may return an instance of ReflectionNamedType. To get the name of the parameter type, ReflectionNamedType() is available in this case.

<?php
function someFunction(int $param, $param2) {}

$reflectionFunc = new ReflectionFunction('someFunction');
$reflectionParams = $reflectionFunc->getParameters();
$reflectionType1 = $reflectionParams[0]->getType();
$reflectionType2 = $reflectionParams[1]->getType();

assert($reflectionType1 instanceof ReflectionNamedType);
echo $reflectionType1->getName(), PHP_EOL;
var_dump($reflectionType2);
?>

以上例程会输出：

int
NULL

Example #2 ReflectionParameter::getType() Usage before PHP 7.1.0

<?php
function someFunction(int $param, $param2) {}

$reflectionFunc = new ReflectionFunction('someFunction');
$reflectionParams = $reflectionFunc->getParameters();
$reflectionType1 = $reflectionParams[0]->getType();
$reflectionType2 = $reflectionParams[1]->getType();

echo $reflectionType1, PHP_EOL;
var_dump($reflectionType2);
?>

Output of the above example in PHP 7.0:

int
NULL

参见