ReflectionParameter::getType()

版本：php7

(PHP 7)

Gets a parameter's type

说明

publicReflectionParameter::getType(void) :ReflectionType

Gets the associated type of a parameter.

参数

此函数没有参数。

返回值

Returns aReflectionTypeobject if a parameter type is specified,NULLotherwise.

范例

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

As of PHP 7.1.0,ReflectionType::__toString()is deprecated,andReflectionParameter::getType()mayreturn an instance ofReflectionNamedType. 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 #2ReflectionParameter::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

• ReflectionParameter::hasType() Checks if parameter has a type
• ReflectionType::__toString() To string