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    The ReflectionProperty class

    (PHP 5, PHP 7)

    Introducere

    The ReflectionProperty class reports information about class properties.

    Sinopsisul clasei

    ReflectionProperty implements Reflector {
    /* Constante */
    const int IS_STATIC = 1 ;
    const int IS_PUBLIC = 256 ;
    const int IS_PROTECTED = 512 ;
    const int IS_PRIVATE = 1024 ;
    /* Proprietăți */
    public $name ;
    public $class ;
    /* Metode */
    final private __clone ( ) : void
    public __construct ( mixed $class , string $name )
    public static export ( mixed $class , string $name , bool $return = ? ) : string
    public getDeclaringClass ( ) : ReflectionClass
    public getDefaultValue ( ) : mixed
    public getDocComment ( ) : string
    public getModifiers ( ) : int
    public getName ( ) : string
    public getType ( ) : ReflectionType|null
    public getValue ( object $object = ? ) : mixed
    public hasDefaultValue ( ) : bool
    public hasType ( ) : bool
    public isDefault ( ) : bool
    public isInitialized ( object $object = ? ) : bool
    public isPrivate ( ) : bool
    public isProtected ( ) : bool
    public isPublic ( ) : bool
    public isStatic ( ) : bool
    public setAccessible ( bool $accessible ) : void
    public setValue ( object $object , mixed $value ) : void
    public __toString ( ) : string
    }

    Proprietăți

    name

    Name of the property. Read-only, throws ReflectionException in attempt to write.

    class

    Name of the class where the property is defined. Read-only, throws ReflectionException in attempt to write.

    Constante predefinite

    ReflectionProperty Modifiers

    ReflectionProperty::IS_STATIC

    Indicates static properties.

    ReflectionProperty::IS_PUBLIC

    Indicates public properties.

    ReflectionProperty::IS_PROTECTED

    Indicates protected properties.

    ReflectionProperty::IS_PRIVATE

    Indicates private properties.

    Cuprins

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    User Contributed Notes 2 notes

    up
    3
    rasmus at mindplay dot dk
    14 years ago
    I think a more accurate explanation is this:

    The Reflection classes are designed to reflect upon the source code of an application, not on any runtime information.

    I think you misunderstand the ReflectionProperty constructor in your example above. The fact that it accepts an object as argument is just a convenience feature - you are actually inspecting the class of that object, not the object itself, so it's basically equivalent to:

    <?php

    // works fine
    $Reflection = new ReflectionProperty(get_class($a), 'a');

    // throws exception
    $Reflection = new ReflectionProperty(get_class($a), 'foo');

    ?>

    Getting the class of the object you're passing in is implied, since inspecting a defined property is the purpose of this class.

    In your example, $a->foo is a dynamic member - it is not defined as a member of class, so there is no defining class reference, line number, default value, etc. - which means, there is nothing to reflect upon.

    Clearly this very useful library could use some real documentation...
    up
    -5
    Nanhe Kumar
    10 years ago
    <?php
    //serialize static properties (class variable)

    class Student {

        private     $members = array();
        protected     $name;
        public static     $noOfStudent;

        public function     __construct($name = 'Nanhe Kumar') {
                $this->name = $name;
                Student::$noOfStudent++;
        }

        public function     __sleep() {
                $vars = get_class_vars(get_class($this));
            foreach (    $vars as $key => $val) {
                if (!empty(    $val))
                        $this->members[$key] = $val;
            }
            return     array_keys(get_object_vars($this));
        }

        public function     __wakeup() {
            foreach (    $this->members as $key => $val) {
                    $prop = new ReflectionProperty(get_class($this), $key);
                    $prop->setValue(get_class($this), $val);
            }
                $this->members = array();
        }

        public function     getTotalStudent() {
            return     self::$noOfStudent;
        }

    }

    $so1 = new Student();
    $so2 = new Student();
    $serialized = serialize($so1);
    print_r($serialized); //O:7:"Student":2:{s:16:"Studentmembers";a:1:{s:11:"noOfStudent";i:2;}s:7:"*name";s:11:"Nanhe Kumar";}
    $unserialized = unserialize($serialized);
    print_r($unserialized); //Student Object ( [members:Student:private] => Array ( ) [name:protected] => Nanhe Kumar )
    echo Student::$noOfStudent; //2
    ?>
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