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ReflectionParameter::__construct

(PHP 5, PHP 7)

ReflectionParameter::__constructConstruct

说明

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

Constructs a ReflectionParameter instance.

参数

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.

返回值

没有返回值。

范例

示例 #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

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User Contributed Notes 1 note

up
7
tracid2008 t gmail o com
9 years ago
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');
?>
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