(PHP 5, PHP 7)
ReflectionParameter::__construct — Construct
public ReflectionParameter::__construct ( callable $function , mixed $parameter )
Constructs a ReflectionParameter instance.
function
The function to reflect parameters from.
parameter
Either an int specifying the position of the parameter (starting with zero), or a the parameter name as string.
No value is returned.
Example #1 Using the ReflectionParameter class
<?php
function foo($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 from PHP 5.2.3
$param->getName(),
var_export($param->getClass(), 1),
var_export($param->allowsNull(), 1),
var_export($param->isPassedByReference(), 1),
$param->isOptional() ? 'yes' : 'no'
);
}
?> The above example will output something similar to:
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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Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/reflectionparameter.construct.php