ReflectionProperty::__construct

(PHP 5)

ReflectionProperty::__construct — Construct a ReflectionProperty object

说明

public ReflectionProperty::__construct ( mixed $class , string $name )

Warning

本函数还未编写文档，仅有参数列表。

参数

class: The class name, that contains the property.
name: The name of the property being reflected.

返回值

没有返回值。

错误／异常

Trying to get or set private or protected class property's values will result in an exception being thrown.

范例

Example #1 ReflectionProperty::__construct() example

  <?php
 class  String
 {
    public  $length   =  5 ;
}

 // Create an instance of the ReflectionProperty class
 $prop  = new  ReflectionProperty ( 'String' ,  'length' );

 // Print out basic information
 printf (
     "===> The%s%s%s%s property '%s' (which was %s)\n"  .
     "     having the modifiers %s\n" ,
         $prop -> isPublic () ?  ' public'  :  '' ,
         $prop -> isPrivate () ?  ' private'  :  '' ,
         $prop -> isProtected () ?  ' protected'  :  '' ,
         $prop -> isStatic () ?  ' static'  :  '' ,
         $prop -> getName (),
         $prop -> isDefault () ?  'declared at compile-time'  :  'created at run-time' ,
         var_export ( Reflection :: getModifierNames ( $prop -> getModifiers ()),  1 )
);

 // Create an instance of String
 $obj = new  String ();

 // Get current value
 printf ( "---> Value is: " );
 var_dump ( $prop -> getValue ( $obj ));

 // Change value
 $prop -> setValue ( $obj ,  10 );
 printf ( "---> Setting value to 10, new value is: " );
 var_dump ( $prop -> getValue ( $obj ));

 // Dump object
 var_dump ( $obj );
 ?>

以上例程的输出类似于：

===> The public property 'length' (which was declared at compile-time)
     having the modifiers array (
  0 => 'public',
)
---> Value is: int(5)
---> Setting value to 10, new value is: int(10)
object(String)#2 (1) {
  ["length"]=>
  int(10)
}

Example #2 Getting value from private and protected properties using ReflectionProperty class

  <?php

 class  Foo  {
    public  $x  =  1 ;
    protected  $y  =  2 ;
    private  $z  =  3 ;
}

 $obj  = new  Foo ;

 $prop  = new  ReflectionProperty ( 'Foo' ,  'y' );
 $prop -> setAccessible ( true );  
 var_dump ( $prop -> getValue ( $obj ));  // int(2)

 $prop  = new  ReflectionProperty ( 'Foo' ,  'z' );
 $prop -> setAccessible ( true );  
 var_dump ( $prop -> getValue ( $obj ));  // int(2)

 ?>

以上例程的输出类似于：

int(2)
int(3)

参见

ReflectionProperty::getName() - Gets property name
Constructors