ReflectionParameter::__construct

(PHP 5, PHP 7, PHP 8)

ReflectionParameter::__constructConstruct

Опис

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

Constructs a ReflectionParameter instance.

Параметри

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.

Приклади

Приклад #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'
);
}
?>

Поданий вище приклад виведе щось схоже на:

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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