ReflectionParameter::__construct
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ReflectionParameter::__construct

(PHP 5, PHP 7, PHP 8)

ReflectionParameter::__constructConstruct

Descrizione

public function ReflectionParameter::__construct(string|array|object $function, int|string $param)

Constructs a ReflectionParameter instance.

Elenco dei parametri

function

The function to reflect parameters from.

param

Either an int specifying the position of the parameter (starting with zero), or the parameter name as string.

Esempi

Example #1 Using the ReflectionParameter class

<?php
function foo($a, $b, $c) { }
function bar(Exception $a, &$b, $c) { }
function baz(ReflectionFunction $a, $b = 1, $c = null) { }
function abc() { }

$reflect = new ReflectionFunction('foo');

echo $reflect;

foreach ($reflect->getParameters() as $i => $param) {
    printf(
        "-- Parameter #%d: %s {\n".
        "   Class: %s\n".
        "   Allows NULL: %s\n".
        "   Passed to by reference: %s\n".
        "   Is optional?: %s\n".
        "}\n",
        $i, // $param->getPosition() can be used
        $param->getName(),
        var_export($param->getClass(), 1),
        var_export($param->allowsNull(), 1),
        var_export($param->isPassedByReference(), 1),
        $param->isOptional() ? 'yes' : 'no'
    );
}
?>

Il precedente esempio visualizzerà qualcosa simile a:

Function [ <user> function foo ] {
  @@ /Users/philip/cvs/phpdoc/a 2 - 2

  - Parameters [3] {
    Parameter #0 [ <required> $a ]
    Parameter #1 [ <required> $b ]
    Parameter #2 [ <required> $c ]
  }
}
-- Parameter #0: a {
   Class: NULL
   Allows NULL: true
   Passed to by reference: false
   Is optional?: no
}
-- Parameter #1: b {
   Class: NULL
   Allows NULL: true
   Passed to by reference: false
   Is optional?: no
}
-- Parameter #2: c {
   Class: NULL
   Allows NULL: true
   Passed to by reference: false
   Is optional?: no
}

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