get_class_methods
All 3 of get_object_vars, get_class_vars and reflection getDefaultProperties will reveal the name of the array. For serialization I recommend:
<?php
$cName = get_class($this);
$varTemplate= get_class_vars($cName)
foreach ($varTemplate as $name => $defaultVal) {
$vars[$name] = $this->$name; // gets actual val.
}
?>
No scan the $vars and create serialization string how you wish.
This protects against erroneous prior deserializing in maintaining the integrity of the class template and ignoring unintended object properties.
get_class_vars
(PHP 4, PHP 5)
get_class_vars — Obtener las propiedades predeterminadas de una clase
Descripción
array get_class_vars
( string $class_name
)
Obtiene las propieades predeterminadas de la clase dada.
Parámetros
- class_name
-
El nombre de la clase
Valores devueltos
Devuelve una matriz asociativa de las propiedades declaradas visibles desde el ámbito actual, con su valor predeterminado. Los elementos de la matriz resultante están en la forma nombrevariable => valor.
Historial de cambios
| Versión | Descripción |
|---|---|
| 5.0.3 | Según el ámbito, get_class_vars() devolverá sólo las propiedades que pueden ser accedidas desde el ámbito actual. |
| 5.0.2 | Al llamar a get_class_vars() ahora se expondrán todas las propiedades como una matriz, a diferencia del comportamiento anterior donde las propieades protected y private eran prefijadas con bytes nul. |
| 5.0.1 | Al llamar a get_class_vars() se expondrán todas las propiedades, como cuando se convierte un objeto en una clase. |
| Prior to 4.2.0 | Las variables no inicializadas de clases no serán reportadas por get_class_vars() |
Ejemplos
Example #1 Ejemplo de get_class_vars()
<?php
class miclase {
var $var1; // esta no tiene valor predeterminado...
var $var2 = "xyz";
var $var3 = 100;
private $var4; // PHP 5
// constructor
function miclase() {
// cambiar algunas propiedades
$this->var1 = "foo";
$this->var2 = "bar";
return true;
}
}
$mi_clase = new miclase();
$vars_clase = get_class_vars(get_class($mi_clase));
foreach ($vars_clase as $nombre => $valor) {
echo "$nombre : $valor\n";
}
?>
El resultado del ejemplo sería:
// Antes de PHP 4.2.0 var2 : xyz var3 : 100 // A partir de PHP 4.2.0 var1 : var2 : xyz var3 : 100
Example #2 get_class_vars() y comportamiento de ámbito
<?php
function formato($matriz)
{
return implode('|', array_keys($matriz)) . "\r\n";
}
class TestCase
{
public $a = 1;
protected $b = 2;
private $c = 3;
public static function expose()
{
echo formato(get_class_vars(__CLASS__));
}
}
TestCase::expose();
echo formato(get_class_vars('TestCase'));
?>
El resultado del ejemplo sería:
// 5.0.0 a| * b| TestCase c a| * b| TestCase c // 5.0.1 - 5.0.2 a|b|c a|b|c // 5.0.3 + a|b|c a
Ver también
- get_class_methods() - Obtiene los nombres de los métdos de una clase
- get_object_vars() - Obtiene las propiedades del objeto dado
add a note
User Contributed Notes
get_class_vars
ken at verango dot com
04-Oct-2010 11:50
ianitsky at gmail dot com
10-Nov-2009 07:53
If you need get the child protected/private vars ignoring the parent vars, use like this:
<?php
class childClass extends parentClass {
private $login;
private $password;
public function __set($key, $val) {
if ($key == 'password')
$this->$key = md5($val);
else
$this->$key = $val;
}
}
class parentClass {
public $name;
public $email;
function __construct() {
$reflection = new ReflectionClass($this);
$vars = array_keys($reflection->getdefaultProperties());
$reflection = new ReflectionClass(__CLASS__);
$parent_vars = array_keys($reflection->getdefaultProperties());
$my_child_vars = array();
foreach ($vars as $key) {
if (!in_array($key, $parent_vars)) {
$my_child_vars[] = $key;
}
}
print_r($my_child_vars);
}
}
$child_class = new childClass();
?>
harmor
20-Dec-2008 11:53
So I wanted to get a list of the public parameters in a child class using a static function pre-5.3.0 (< 5.3.0). In 5.3.0+ you would use the new 'static' like you would 'self' to get the late binding.
<?php
class childClass extends parentClass
{
public $id;
public $name;
public static function getFields()
{
return self::_getFields(__CLASS__);
}
}
abstract class parentClass
{
public $idInParent;
public $nameInParent;
abstract public static function getFields();
final protected static function _getFields($className)
{
$rtn = array();
foreach (array_keys(get_class_vars($className)) as $var) {
$rtn[] = $var;
}
return $rtn;
}
}
var_dump(childClass::getFields());
?>
Results:
array(4) {
[0]=>
string(2) "id"
[1]=>
string(4) "name"
[2]=>
string(10) "idInParent"
[3]=>
string(12) "nameInParent"
}
artktec at art-k-tec dot com
16-Nov-2007 05:18
There seems to be be a function to get constants missing , i.e. get_class_constants() ... so here is a simple function for you all. Hopefully Zend will include this in the next round as a native php call, without using reflection.
<?php
function GetClassConstants($sClassName) {
$oClass = new ReflectionClass($sClassName);
return $oClass->getConstants());
}
?>
phpnet at stccorp dot net
15-Jun-2007 12:18
This is one of the best php functions. Look at what you can do
class Object
{
var $updtFields;//keep track of affected values
function Object($record="") {
if (is_array($record))
{
$this->updtFields = array();
foreach(array_keys(get_class_vars(get_class($this))) as $k)
if (isset($record[$k]))
{
$this->$k = $record[$k];
$this->updtFields[] = $k;
}
}
}//end of arrayToObject
function toDebug($nl='<br>')
{
foreach(array_keys(get_class_vars(get_class($this))) as $k)
echo "$k = [" . $this->$k . "]{$nl}";
}//end of toDebug
}
Now you can do really cool things. If you have a form like
<form action="" method="post">
<input type="text" name="name" />
<input type="text" name="phone" />
<input type="submit" />
</form>
and you define your class like this
class Person extends Object{
var $name; //same same as in the form
var $phone;
}
when you submmit the form, you can get the data like
$person = new Person($_POST);
//everything in just one line,cool!! Also if you use pear db or adodb when you get data from the database you can do the same thing except use the $row that you get from the database. Remember to ask the result is associative mode.
This is my core Object for everthing I do and it works great.
bernd at tiggerswelt dot net
29-Jan-2007 10:52
If you assign a constant value using the self-scope by default to a variable, get_class_vars() will result in a FATAL error.
Example:
<?PHP
class Foo {
const Bar = "error";
public $Foo = self::Bar;
}
print_r(get_class_vars("Foo"));
?>
... but using "Foo::Bar" instead "self::Bar" will work ;)
gizmobits at hotmail dot com
04-Mar-2006 03:48
I wanted a simple ToString() function that was automatic and class independent. I wanted to dump it into any of several classes and get values quickly. I wanted to leave it there so I could customize it for each class, so an outside function wasn't suitable. I came up with this and thought it might be useful. Have fun!
<?php
function ToString () {
$s = "";
$s .= "<table>\n";
$s .= "<tr><td colspan=2><hr></td></tr>\n";
foreach (get_class_vars(get_class($this)) as $name => $value) {
$s .= "<tr><td>$name:</td><td>" . $this->$name . "</td></tr>\n";
}
$s .= "<tr><td colspan=2><hr></td></tr>\n";
$s .= "</table>\n";
return $s;
}
?>
php dot net at sharpdreams dot com
25-Oct-2005 01:25
Contrary to multiple comments throughout the manual, get_class_vars() performed within a class can access any public, protected, and private members.
<?php
class Foo {
public $x;
protected $y;
private $z;
public function __sleep() {
return( get_class_vars( __CLASS__ ) );
}
}
?>
works fine (returns x, y, & z). However, given the same class as above,
<?php
print_r( get_class_vars( "Foo" ) );
?>
will NOT return x, y, & z. Instead it will only return the public members (in our case, z).
alan_k at php dot net
22-Jan-2005 03:23
in PHP5 to get all the vars (including private etc.) use:
$reflection = new ReflectionClass($class);
$defaults = $reflection->getdefaultProperties();
rec at NOSPAM dot instantmassacre dot com
24-Jan-2003 12:23
If you want to retrieve the class vars from within the class itself, use $this.
<?php
class Foo {
var $a;
var $b;
var $c;
var $d;
var $e;
function GetClassVars()
{
return array_keys(get_class_vars(get_class($this))); // $this
}
}
$Foo = new Foo;
$class_vars = $Foo->GetClassVars();
foreach ($class_vars as $cvar)
{
echo $cvar . "<br />\n";
}
?>
Produces, after PHP 4.2.0, the following:
a
b
c
d
e