ReflectionParameter::__construct

(PHP 5, PHP 7)

ReflectionParameter::__constructConstruct

说明

public ReflectionParameter::__construct ( callable $function , mixed $parameter )

Constructs a ReflectionParameter instance.

参数

function

The function to reflect parameters from.

parameter

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

返回值

没有返回值。

范例

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'
    
);
}
?>

以上例程的输出类似于:

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
}

参见

User Contributed Notes

tracid2008 t gmail o com 06-Dec-2011 03:31
You also can use a class instead of a function name. Just use an array like that
<?php
$reflect
= new ReflectionParameter(array('className', 'methodName'), 'property');
?>