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get_object_vars — 返回由对象属性组成的关联数组 对象的属性

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星期日, 2015-08-30 16:25 — shiping1

get_object_vars

(PHP 4, PHP 5)

get_object_vars — 返回由对象属性组成的关联数组

说明 ¶

array get_object_vars ( object $obj )

返回由 obj 指定的对象中定义的属性组成的关联数组。

Note:

在 PHP 4.2.0 之前的版本中，如果在 obj 对象实例中声明的变量没有被赋值，则它们将不会在返回的数组中。而在 PHP 4.2.0 之后，这些变量作为键名将被赋予 NULL 值。

Example #1 使用 get_object_vars()

<?php
class Point2D {
    var $x, $y;
    var $label;

    function Point2D($x, $y)
    {
        $this->x = $x;
        $this->y = $y;
    }

    function setLabel($label)
    {
        $this->label = $label;
    }

    function getPoint()
    {
        return array("x" => $this->x,
                     "y" => $this->y,
                     "label" => $this->label);
    }
}

// "$label" is declared but not defined
$p1 = new Point2D(1.233, 3.445);
print_r(get_object_vars($p1));

$p1->setLabel("point #1");
print_r(get_object_vars($p1));

?>

以上例程会输出：

 Array
 (
     [x] => 1.233
     [y] => 3.445
     [label] =>
 )

 Array
 (
     [x] => 1.233
     [y] => 3.445
     [label] => point #1
 )

参见 get_class_methods() 和 get_class_vars()。

参数 ¶

object

An object instance.

返回值 ¶

Returns an associative array of defined object accessible non-static properties for the specified object in scope. If a property have not been assigned a value, it will be returned with a NULL value.

更新日志 ¶

版本说明
5.3.0This function now returns NULL if the object isn't an object.
prior to 5.3.0If the object isn't an object, then get_object_vars() would return FALSE
prior to 4.2.0If the variables declared in the class of which the object is an instance, have not been assigned a value, those will not be returned in the array

范例 ¶

Example #2 Use of get_object_vars()

<?php

class foo {
    private $a;
    public $b = 1;
    public $c;
    private $d;
    static $e;
   
    public function test() {
        var_dump(get_object_vars($this));
    }
}

$test = new foo;
var_dump(get_object_vars($test));

$test->test();

?>

以上例程会输出：

array(2) {
  ["b"]=>
  int(1)
  ["c"]=>
  NULL
}
array(4) {
  ["a"]=>
  NULL
  ["b"]=>
  int(1)
  ["c"]=>
  NULL
  ["d"]=>
  NULL
}

参见 ¶

add a note add a note

User Contributed Notes 38 notes

22
fmmarzoa at librexpresion dot org ¶
10 years ago
You can still cast the object to an array to get all its members and see its visibility. Example:

<?php

class Potatoe {
    public $skin;
    protected $meat;
    private $roots;

    function __construct ( $s, $m, $r ) {
        $this->skin = $s;
        $this->meat = $m;
        $this->roots = $r;
    }
}

$Obj = new Potatoe ( 1, 2, 3 );

echo "<pre>\n";
echo "Using get_object_vars:\n";

$vars = get_object_vars ( $Obj );
print_r ( $vars );

echo "\n\nUsing array cast:\n";

$Arr = (array)$Obj;
print_r ( $Arr );

?>

This will returns:

Using get_object_vars:
Array
(
    [skin] => 1
)

Using array cast:
Array
(
    [skin] => 1
    [ * meat] => 2
    [ Potatoe roots] => 3
)

As you can see, you can obtain the visibility for each member from this cast. That which seems to be spaces into array keys are '\0' characters, so the general rule to parse keys seems to be:

Public members: member_name
Protected memebers: \0*\0member_name
Private members: \0Class_name\0member_name

I've wroten a obj2array function that creates entries without visibility for each key, so you can handle them into the array as it were within the object:

<?php

function obj2array ( &$Instance ) {
    $clone = (array) $Instance;
    $rtn = array ();
    $rtn['___SOURCE_KEYS_'] = $clone;

    while ( list ($key, $value) = each ($clone) ) {
        $aux = explode ("\0", $key);
        $newkey = $aux[count($aux)-1];
        $rtn[$newkey] = &$rtn['___SOURCE_KEYS_'][$key];
    }

    return $rtn;
}

?>

I've created also a <i>bless</i> function that works similar to Perl's bless, so you can further recast the array converting it in an object of an specific class:

<?php

function bless ( &$Instance, $Class ) {
    if ( ! (is_array ($Instance) ) ) {
        return NULL;
    }

    // First get source keys if available
    if ( isset ($Instance['___SOURCE_KEYS_'])) {
        $Instance = $Instance['___SOURCE_KEYS_'];
    }

    // Get serialization data from array
    $serdata = serialize ( $Instance );

    list ($array_params, $array_elems) = explode ('{', $serdata, 2);
    list ($array_tag, $array_count) = explode (':', $array_params, 3 );
    $serdata = "O:".strlen ($Class).":\"$Class\":$array_count:{".$array_elems;

    $Instance = unserialize ( $serdata );
    return $Instance;
}
?>

With these ones you can do things like:

<?php

define("SFCMS_DIR", dirname(__FILE__)."/..");
require_once (SFCMS_DIR."/Misc/bless.php");

class Potatoe {
    public $skin;
    protected $meat;
    private $roots;

    function __construct ( $s, $m, $r ) {
        $this->skin = $s;
        $this->meat = $m;
        $this->roots = $r;
    }

    function PrintAll () {
        echo "skin = ".$this->skin."\n";
        echo "meat = ".$this->meat."\n";
        echo "roots = ".$this->roots."\n";
    }
}

$Obj = new Potatoe ( 1, 2, 3 );

echo "<pre>\n";
echo "Using get_object_vars:\n";

$vars = get_object_vars ( $Obj );
print_r ( $vars );

echo "\n\nUsing obj2array func:\n";

$Arr = obj2array($Obj);
print_r ( $Arr );

echo "\n\nSetting all members to 0.\n";
$Arr['skin']=0;
$Arr['meat']=0;
$Arr['roots']=0;

echo "Converting the array into an instance of the original class.\n";
bless ( $Arr, Potatoe );

if ( is_object ($Arr) ) {
    echo "\$Arr is now an object.\n";
    if ( $Arr instanceof Potatoe ) {
        echo "\$Arr is an instance of Potatoe class.\n";
    }
}

$Arr->PrintAll();

?>
12
ananda dot putra at gmail dot com ¶
9 years ago
Hi all, I just wrote a function which dumps all the object propreties and its associations recursively into an array. Here it is..
<?php
function object_to_array($obj) {
        $_arr = is_object($obj) ? get_object_vars($obj) : $obj;
        foreach ($_arr as $key => $val) {
                $val = (is_array($val) || is_object($val)) ? object_to_array($val) : $val;
                $arr[$key] = $val;
        }
        return $arr;
}
?>

Example:
You have an object like this:
fruitsbasket Object
(
    [Fruits] => Array
        (
            [0] => fruits Object
                (
                    [_name] => Mango
                    [_color] => Green
                    [_weight] => 10
                )

            [1] => fruits Object
                (
                    [_name] => Apple
                    [_color] => Red
                    [_weight] => 15
                )

            [2] => fruits Object
                (
                    [_name] => Grape
                    [_color] => Purple
                    [_weight] => 5
                )

        )

    [total_weight] => 30
)

just do:
<?php
$the_array = object_to_array($the_object);
print_r($the_array);
?>

it will produce an array:
Array
(
    [Fruits] => Array
        (
            [0] => Array
                (
                    [_name] => Mango
                    [_color] => Green
                    [_weight] => 10
                )

            [1] => Array
                (
                    [_name] => Apple
                    [_color] => Red
                    [_weight] => 15
                )

            [2] => Array
                (
                    [_name] => Grape
                    [_color] => Purple
                    [_weight] => 5
                )

        )

    [total_weight] => 30
)

I wish function like this could be usefull for you all. :)
14
oom at oscarotero dot com ¶
1 year ago
You can use call_user_func() to return public variables from inside the class:

class Test {
    protected $protected;
    public $public;
    private $private;

    public function getPublicVars () {
        return call_user_func('get_object_vars', $this);
    }
}

$test = new Test();
var_dump($test->getPublicVars()); // array("public" => NULL)
9
pardini at gmail dot com ¶
7 years ago
get_object_vars() has confusing behaviour when called as get_object_vars($this) or similar: since a method inside a class definition can access private vars, apparently so can get_object_vars(), so it returns private vars as well. 

A simple workaround is to define a method that in itself calls get_object_vars, like:

<?php
function getPublicObjectVars($obj) {
  return get_object_vars($obj);
}

class Smth {
  private $notShown = 1;
  public $shown = 2;

  function test() {
    $vars = get_object_vars($this); // includes 'notShown'
    $vars = getPublicObjectVars($this); // only 'shown'
  }

}
?>
9
@chozilla ¶
2 years ago
A simple way to call this function within an Object and to only export the *public* params would be to artificially change the scope - for example with a closure in php 5.3: 

<?php 
class Example 
{ 
    public $publicSetting = 'public'; 
    protected $protectedSetting = 'protected'; 
    private $privateSetting = 'private'; 
    
    public function showEverything() 
    { 
        return get_object_vars($this); 
    } 
    
    public function showMyPublicsOnly() 
    { 
        $me = $this; 
        $publics = function() use ($me) { 
            return get_object_vars($me); 
        }; 
        return $publics(); 
    } 
} 
?>
2
jordi at laigu dot net ¶
11 years ago
In case your object contains again OBJECTS or ARRAYS:

function makeAssoc($res) {
  if (is_object($res)) $res = get_object_vars($res);
  while (list($key, $value) = each($res)) {
    if (is_object($value) || is_array($value)) {
      $res[$key] = makeAssoc($value);
    }
  }
  return $res;
}

Thanks to mark at dreamzpace dot com
4
Anonymous ¶
10 years ago
actually, it's not entirely true that php5 will only return public members....php5 will return any variable IT HAS ACCESS TO

In other words, if you do a get_class_variables($this) inside a class, you'll get everything - public, private, the whole shebang...really annoying since you can't check to see what's private/public without using reflection
2
jon at websandbox dot net ¶
7 years ago
If you're using the SPL ArrayObject class (or similar, or the ArrayAccess interface), you may have noticed that it's difficult to loop through an object's properties.  

get_object_vars does not return the properties of an ArrayObject.  The only workaround I can see is to use get_class_vars.

<?php
$obj = new ArrayObject();
$obj->foo = "bar";
$obj[] = "1";
$obj[] = "2";
foreach($obj as $key => $value) {
// will iterate over the array, iterating over "1" and "2", but ignoring $obj->foo
}

var_dump($obj); // dumps the array values, ignores $obj->foo

$a = get_object_vars($obj); // returns an empty array

class Fart extends ArrayObject {
    public $foo = "bar";
}

$obj = new Fart();
$a = get_object_vars($obj); // return an empty array
$a = get_class_vars(get_class($obj)); // returns array("foo"=>"bar"), Yay!

/* The above works with subclasses as well */
class Toot extends Fart {
    public $weeble = "wobble";
}

$a = get_class_vars(get_class($obj)); 
// returns array("weeble" => "wobble", "foo"=>"bar"), Yay again!

?>

So, to iterate over the properties of an ArrayObject, and not the array values:

<?php

$obj = new Toot(); // which is a subclass of ArrayObject
$props = get_class_vars(get_class($obj));
foreach($props as $prop => $defaultValue) {
  $value = $obj->$prop; // now you have the property name and  its value
}

?>
1
Fabien Haddadi ¶
3 years ago
It seems like there's no function that determines all the *static* variables of a class. 

I've come out with this one as I needed it in a project: 

<?php 
function get_class_static_vars($object) { 
     return array_diff(get_class_vars(get_class($object)), get_object_vars($object)); 
} 
?> 

It relies on an interesting property: the fact that get_object_vars only returns the non-static variables of an object.
1
christopher AT NOSPAM AT idealab DOT com ¶
11 years ago
Hmmm.  A bit embarassing...

It turns out the best way to get references to all of your objects member variables is NOT with the functions I provided before, or with get_object_vars.

Just cast the object to array.

$a=(array)$obj;

# The two following statements are now equivalent and identical
$a["member"]=3;
$obj->member=3;

A very powerful tool, for inspectors and what not.
1
michael at tapinternet dot com ¶
13 years ago
It seems that get_object_vars will now return properties of an object even if they have no value  - meaning only defined by var $foo in the class declaration.  This is noted behaviour in 4.2.1 which is different from previous versions and hitherto undocumented on this page.
2
beat ¶
9 months ago
If your object contains a reference, beware that you might get references for all object properties in the array values, thus when changing values in the array, they may change the object too (confirmed and not yet fixed PHP bug https://bugs.php.net/bug.php?id=66961 affecting all PHP versions up to at least 5.6.2 and 5.5.18 and 5.4.34).

This 10-years old comment tried reporting this: http://php.net/manual/en/function.get-object-vars.php#40515 but its exemple was incomplete. See bug report for example.
2
rabatto1 at web dot de ¶
1 year ago
function to convert object (with children) to an (associative) array ... recusive 

<?php 

// --------------------------------------------------------- 
// ----- object_to_array_recusive --- function (PHP) ------ 
// -------------------------------------------------------- 
// -- arg1:  $object  =  (PHP Object with Children) 
// -- arg2:  $assoc   =  (TRUE / FALSE) - optional 
// -- arg3:  $empty   =  ('' or NULL) - optional 
// -------------------------------------------------------- 
// ----- return: Array from Object --- (associative) ------ 
// -------------------------------------------------------- 

function object_to_array_recusive ( $object, $assoc=1, $empty='' ) 
{ 
    $out_arr = array(); 
    $assoc = (!empty($assoc)) ? TRUE : FALSE; 
    
    if (!empty($object)) { 
        
        $arrObj = is_object($object) ? get_object_vars($object) : $object;
    
        $i=0; 
        foreach ($arrObj as $key => $val) { 
            $akey = ($assoc !== FALSE) ? $key : $i; 
              if (is_array($val) || is_object($val)) { 
                $out_arr[$key] = (empty($val)) ? $empty : object_to_array_recusive($val); 
              } 
              else { 
                $out_arr[$key] = (empty($val)) ? $empty : (string)$val; 
              } 
        $i++; 
        }

    } 

    return $out_arr;
}

// -------------------------------------------------------- 
// -------------------------------------------------------- 

?>

Example / Usage: 

a) return an associative (recusive) array from object 

$new_arr1 = object_to_array_recusive($my_object); 
// --- or --- object_to_array_recusive($my_object,TRUE); 
// --- or --- object_to_array_recusive($my_object,1); 

b) return a numeric  (recusive) array from object (set 2nd argument = FALSE) 

$new_arr2 = object_to_array_recusive($my_object,FALSE); 

you can pre-set the Array-Value of Empty (Sub-) Objects in 3rd argument ($empty) 
// --- eg: NULL --- object_to_array_recusive($my_object,1,NULL);
2
biga888 AT gmail ¶
7 years ago
Just thought I would pass this on.

Working with PHP 5.2.4

In Windows this works by reading the vars from the passed in object and copying them to the vars of the current object.

    public function copyMe(User $user) {
        $varArray = get_object_vars($this);
        $copyVarArray = get_object_vars($user);
        foreach ($varArray as $key=>$value) {
            $this->$key = $copyVarArray[$key];
        }
    }

This did not work in Linux, I had to add another function to return the array of vars. Calling get_array_vars on the passed in object would return an empty array.

        public function copyMe(User $user) {
        $varArray = $this->getArray();
        $copyVarArray = $user->getArray();
        foreach ($varArray as $key=>$value) {
            $this->$key = $copyVarArray[$key];
        }
    }

    public function getArray() {
        return get_object_vars($this);
    }
1
jozef at mostka dot com ¶
1 year ago
class A{
    private $priA;
    protected $proA;
    public $pubA;
}

class B extends A{
    private $priB;
    protected $proB;
    public $pubB;

    public function getVars(){
        return array_diff_key(get_object_vars($this), get_class_vars(get_parent_class($this)));
    }
}
$b = new B();
var_dump($b->getVars());

array(3) {
  ["priB"]=>
  NULL
  ["proB"]=>
  NULL
  ["pubB"]=>
  NULL
}
2
manicdepressive AT mindless DOT com ¶
11 years ago
more strange, strange behaviour: 

if you are trying to deep-copy an object with get_object_vars(), strange behaviour can accidentally clobber your original object properties.  please read very, very carefully: 

get_object_vars() may either return references to *or* deep copies of the object's properties *depending on whether that property has been set with the -> operator*.   (this behaviour probably varies per php platform and os so please confirm for yourself.) 

furthermore, consider 
  $properties = get_object_vars($obj);
normally, unset()ting a reference does not affect the original, i.e. $ref = NULL; is not the same as unset($ref); per the references documentation.  However, if you have this strange references version and you unset() an array element of $properties, it will *SET THE OBJECT PROPERTY TO NULL*, which is not how references normally work.  

even stranger behaviour comes into effect that i can only express with an example.  please test this with your version and OS and proceed very carefully:
-->
<?php
echo "<pre>\n";

class Lump
{
   var $size = 'average';

   function & copy()
   {  // return a deep copy
      $copy = new Lump();   
      $properties = get_object_vars($this);
      foreach( array_keys( $properties ) as $property ){
         $copy->$property = $properties[$property];  // deep, right?
      }
      return $copy;
   } 

}

$lump = new Lump();

$lump->size = 'huge';  // <--- this line changes everything
// comment above line out, and see the difference
// also, try substituting another property for 'size'

$properties = get_object_vars($lump);
$properties['size'] = 'small'; // this behavior varies

echo "after changing the properties array:\n";
var_dump( $lump );  
// it's either big or small (never huge) depending on 
// whether you commented-out the indicated line

//------------- let's try using our copy() method

$original_lump = new Lump();
$original_lump->size = 'huge'; // this line changes the behaviour
$other_lump =& $original_lump->copy();
unset( $other_lump->size );
echo "after unsetting in copy:\n";
var_dump( $original_lump ); // i'm afraid so -- original value clobbered !

echo "</pre>\n";
?>
code till dawn, 
   mark meves
1
thiago dot henrique dot mata at gmail dot com ¶
8 years ago
<?php
# How to make a function change the private attributes
# from some object without use serialize functions or
# lose the control of the changes.

/**
* Parent Class to allow the change of privates attributes
* Look the abstract function __setAttribute.
*
* @author Renan de Lima ( renandelima@gmail.com )
* @author Thiago Mata ( thiago.henrique.mata@gmail.com )
* @date 2007-02-21
*/
abstract class father
{
    /**
     * Receive the Aray and try to change the attribute value
     *
     * @param array $arrNewValues
     */
    public function __fromDatabase( $arrNewValues )
    {
        $arrToSet = array_intersect_key( $arrNewValues, get_object_vars( $this ) );
        foreach( $arrToSet as $strAttribute => $mixValue )
        {
            $this->__setAttribute( $strAttribute , $mixValue );
        }
    }
    
    /**
     * Required method to control the attributes of class 
     * @param string $strAttribute
     * @param unknown $mixValue
     */
    abstract protected function __setAttribute( $strAttribute, $mixValue );
    
}

/**
* Just a example of a child class using the functionality
*
* Note: if you don't wanna to allow the change of some attribute
* by this method you can just make more complex the __setAttribute function.
*
* @author Renan de Lima ( renandelima@gmail.com )
* @author Thiago Mata ( thiago.henrique.mata@gmail.com )
* @date 2007-02-21
*/
class son extends father
{
    
    private $atr = 9;
    
    /**
     * This is the most simple implementation of the method.
     * This way it's allowed to the parent class change any attribute
     * @param string $strAttribute
     * @param unknown $mixValue
     */
    protected function __setAttribute( $strAttribute, $mixValue )
    {
        $this->{ $strAttribute } = $mixValue;
    }
    
}

$objSon = new son();
$objSon->__fromDatabase( array( 'atr' => 55 ) );
var_dump( $objSon );
?>
0
kuko at webperfection dot net ¶
2 years ago
get_object_vars($this)
php5.3 + it returns only public and protected; NOT private vars
1
Marc ¶
10 years ago
If you want to access all properties (private, protected, public) of a class and his base class(es) from outside the object you can take a look in the code below.
You can even reffrence them.

Example:
<?php

// Dummy class to act as parent class.
class Dummy
{
    private        $d1 = 1;
    protected    $d2 = 2;
    public        $d3 = 3;
}

// The class to test on.
class Test extends Dummy
{
    private        $t1 = 11;
    protected    $t2 = 12;
    public        $t3 = 13;
}

// Instance of the test class.
$test =& new Test();

// The propertynames of the test class and his parent.
$nameD1 = "\0Dummy\0d1";    // class Dummy, private      $d1
$nameD2 = "\0*\0d2";        // class Dummy, protected $d2
$nameD3 = "d3";            // class Dummy, public    $d3

$nameT1 = "\0Test\0t1";        // class Test,  private      $t1
$nameT2 = "\0*\0t2";        // class Test,  protected $t2
$nameT3 = "t3";            // class Test,  public    $t3

// Printing all members (private, protected, public) of test class and parent.
// These are the values at construction.
print("Original object:\n");
print("\t\$d1 = ".$test->$nameD1."\n");
print("\t\$d2 = ".$test->$nameD2."\n");
print("\t\$d3 = ".$test->$nameD3."\n");
print("\t\$t1 = ".$test->$nameT1."\n");
print("\t\$t2 = ".$test->$nameT2."\n");
print("\t\$t3 = ".$test->$nameT3."\n");
print("\n");

// Create new values to use as reffrence.
$varD1 = 31;
$varD2 = 32;
$varD3 = 33;

$varT1 = 41;
$varT2 = 42;
$varT3 = 43;

// Reffrence these to the class properties.
$test->$nameD1 =& $varD1;
$test->$nameD2 =& $varD2;
$test->$nameD3 =& $varD3;

$test->$nameT1 =& $varT1;
$test->$nameT2 =& $varT2;
$test->$nameT3 =& $varT3;

// Printing all members (private, protected, public) of test class and parent.
// The values have changed by assigning reffrence to them.
print("Object Changed by reffrence (1):\n");
print("\t\$d1 = ".$test->$nameD1."\n");
print("\t\$d2 = ".$test->$nameD2."\n");
print("\t\$d3 = ".$test->$nameD3."\n");
print("\t\$t1 = ".$test->$nameT1."\n");
print("\t\$t2 = ".$test->$nameT2."\n");
print("\t\$t3 = ".$test->$nameT3."\n");
print("\n");

// Change the original values.
// This will change the class properties.
$varD1 = 61;
$varD1 = 62;
$varD1 = 63;

$varT1 = 71;
$varT1 = 72;
$varT1 = 73;

// Printing all members (private, protected, public) of test class and parent.
// The values have changed because the variables $varXX have been changed.
print("Object Changed by reffrence (2):\n");
print("\t\$d1 = ".$test->$nameD1."\n");
print("\t\$d2 = ".$test->$nameD2."\n");
print("\t\$d3 = ".$test->$nameD3."\n");
print("\t\$t1 = ".$test->$nameT1."\n");
print("\t\$t2 = ".$test->$nameT2."\n");
print("\t\$t3 = ".$test->$nameT3."\n");
print("\n");

// Printing the object using print_r() shows the changes
// have been done on the object.
print("Object Changed (print_r):\n");
print_r($test);
print("\n");

// If you dont now the class propertynames you can get these by casting the
// object to an array. The array keys are the names
$prop = array_keys((array) $test);
print("Getting all class propertynames (print_r)\n");
print_r($prop);

//Result
/*

Original object:
    $d1 = 1
    $d2 = 2
    $d3 = 3
    $t1 = 11
    $t2 = 12
    $t3 = 13

Object Changed by reffrence (1):
    $d1 = 31
    $d2 = 32
    $d3 = 33
    $t1 = 41
    $t2 = 42
    $t3 = 43

Object Changed by reffrence (2):
    $d1 = 63
    $d2 = 32
    $d3 = 33
    $t1 = 73
    $t2 = 42
    $t3 = 43

Object Changed (print_r):
Test Object
(
    [t1:private] => 73
    [t2:protected] => 42
    [t3] => 43
    [d1:private] => 63
    [d2:protected] => 32
    [d3] => 33
)

Getting all class propertynames (print_r)
Array
(
    [0] => Test

*/

?>
0
Dionisiy ¶
3 years ago
Note that before PHP 5.3.9 numeric object variables of unserialized object are not public, and get_object_vars() won't return them:
https://bugs.php.net/bug.php?id=61774
1
christopher AT NOSPAM AT idealab DOT com ¶
11 years ago
Please note that you cannot affect the object via the array values...in other words, the returned array does not contain references to the values within the object, but copies.

If you are making an object inspector or editor, this is not good enough.  So I made the following methods:

METHODS:

function &getVar($obj, $name)
{
        $expr="\$prop=&\$obj->$name;";
        eval($expr);
        return $prop;
}

function &getObjectVars($obj)
{
        $result=array();
        $vars=get_object_vars($obj);
        foreach ($vars as $var => $value)
        {
                $result[$var]=&getVar(&$obj, $var);
        }
        return $result;
}

[NOTE:  You must pass in a reference to an object, not an object.  Sorry if this  offends PHP'ers, but the distinction of pass-by-value and copy-on-assignment drives me batty (compared to Python, Java, Smalltalk), so I make all my functions pass by value, and force myself to pass in a reference to keep track of what is happening under the hood.]

EXAMPLE:

class Bob
{
        function Bob()
        {
                $this->thing=13;
                $this->other="whatever";
        }

        var $thing;
        var $other;
}

$obj=&new Bob();

# NOTE:  Passing in a reference!
$props=getObjectVars(&$obj);
$props["thing"]=-11;

var_dump($obj);

RESULTS:

object(bob)(2) {
  ["thing"]=>
  &int(-11)
  ["other"]=>
  &string(8) "whatever"
}
1
markus at emedia-solutions-wolf dot de ¶
12 years ago
Hi,

I figured out that in prior version to 4.2 the returned array only contains attributes directly in this class, excluding the derived ones from parentclasses.
0
benny at nospam dot com ¶
5 years ago
Be aware of the fact that this is scope-sensitive. If you're calling this from an objects own method, then private and protected vars will be outputted as well. Call it from outside the object and the result will most likely be what you want to archive.
1
info at phpken dot de ¶
12 years ago
hello,

this example will look like all values of vars was set in your class. write a method like the name: dumpClass and then fill in follow code:

$vars = get_object_vars($this);

echo "<b>class vars</b>";

foreach( $vars as $name => $value ) {
    echo "<li>".$name." : ".$value;
}

look at: get_object_vars($this);

andreas v.l
1
mark at dreamzpace dot com ¶
12 years ago
In case your object contains again objects (and so on), this function might be useful:

function makeAssoc($res) {
  $res = get_object_vars($res);
  while (list($key, $value) = each($res)) {
    if (is_object($value)) {
      $res[$key] = makeAssoc($value);
    }
  }
  return $res;
}
1
florian at XCLUDETHISgsf dot de ¶
13 years ago
There is a strange behaviour, not sure whether it is a bug:

if I call
<?
$single_object = $data_array_of_objects[0];
$array_of_objectvars = get_object_vars($single_object);
     foreach($array_of_objectvars as $key => $val) {
     echo(" $key => $val<br>");
     }
?>
I get only _ONE_ line with the $key = first variable name of the object and $val = the values of _ALL_ variables of the object including the first separated by a space.

NOW:
if I call
<?
$single_object = $data_array_of_objects[0];
$array_of_objectvars = get_object_vars($single_object);
     foreach($array_of_objectvars as $key => $val) {
     echo(" $key => $val<br>");
     }
     echo($data_array_of_objects[0]->objectvar1."<br>");
     echo($data_array_of_objects[0]->objectvar2."<br>");
?>

I get a list of $key = $ val as expected, before the other echos' are printed.
It seems to me that get_object_vars works differently when you access a variable in those objects explicitly (as in the echos)
0
C.H. ¶
8 years ago
function conv_obj($Data){
     if(is_object($Data)){
         foreach(get_object_vars($Data) as $key=>$val){
             if(is_object($val)){
                 $ret[$key]=conv_obj($val);
             }else{
                 $ret[$key]=$val;
             }
         }
         return $ret;
     }elseif(is_array($Data)){
         foreach($Data as $key=>$val){
             if(is_object($val)){
                 $ret[$key]=conv_obj($val);
             }else{
                 $ret[$key]=$val;
             }
         }
         return $ret;
     }else{
         return $Data;
     }
}

Very simple function to convert any Subobject to an array.
Created it while working with Soap.
For me as an beginner with PHP, very useful :o)
0
Maikel ¶
8 years ago
To follow the code of d11wtq (enquiries AT chriscorbyn.co.uk). I did this function to inspect all properties(public, private, protected) of object. 

<?php
header("content-type: text/plain");

// Classes to test!
class OtherClass
{
    private $privateVarOtherClass = 11;
}

class MyClass extends OtherClass
{
    protected $protectedVar = "some";
    public $publicVar = "nk";
    private $privateVar = "algo";
    var $oldStyle;
}

// Dangerous function
function get_properties($obj, $values=false)
{
    $obj_dump  = print_r($obj, 1);
    $matches =  array();
    preg_match_all('/^\s+\[(\w+).*\] => (\w*)/m', $obj_dump, $matches);
    if ($values)
    {
        $output = array();
        foreach ($matches[1] as $key => $property)
        {
            $output[$property] = $matches[2][$key];
        }
        return $output;
    }
    else
    {
        return $matches[1];
    }
}

$instance = new MyClass();

echo "Properties\n";
print_r(get_properties($instance));

echo "Properties and values\n";
print_r(get_properties($instance, true));

?>

Note: remember that static properties are not visible to the object. By that not supported to them
-1
firemouth at gmail dot com ¶
7 years ago
This is a slight modification of the previous poster's function.  We ran into a problem using this function when we had a JS array nested inside a JS hash.

Something like this...

myHash = new Hash();
myHash[address] = new Array();

When we threw that at this function, it found the first hash as an object, and then using the previous poster's function, it did not consider the array as an "object."  Instead it gave us a std_object type and we were unable to make any use of it.

The modification we made was adding a check for is_array inside both the is_object and is_array checks when you call the function.  This checks for an array inside either an object or a nested array.

function conv_obj($Data){
    if(is_object($Data)){
    
        foreach(get_object_vars($Data) as $key=>$val){
            if(is_object($val) || is_array($val)){
                $ret[$key]=conv_obj($val);
            }else{
                $ret[$key]=$val;
            }
        }
        return $ret;
    }elseif(is_array($Data)){
        foreach($Data as $key=>$val){
            if(is_object($val) || is_array($val)){
                $ret[$key]=conv_obj($val);
            }else{
                $ret[$key]=$val;
            }
        }
        return $ret;
    }else{
        return $Data;
    }
}
-1
thinice at gmail dot com ¶
8 years ago
To add to my previous comment - the error message should have meant same structure.

As my implementation called for cross-class comparison.
-2
lee dot howarth dot 90 at gmail dot com ¶
1 year ago
I find this function very helpful, What i wanted to do was to get the object properties of an exception so i could sanitize them for output.

        
   try
   {
       throw new Exception( 'Test Exception.', 100 );
   }
   catch( Exception $e )
   {
       var_dump( ( object ) get_object_vars( ( object ) ( new ArrayObject( $e ) ) -> getarrayCopy() ) );
   }

Example return:

object(stdClass)#10 (4) { ["message"]=> string(15) "Test Exception." ["code"]=> int(100) ["file"]=> string(29) "C:\xampp\htdocs\dev\index.php" ["line"]=> int(19) }
-1
support at sascha minus diebel dot de ¶
9 years ago
Note that get_object_vars() returns the variables of the object not the class. You need to know if your class is extended from a parent class.
-1
d11wtq (enquiries AT chriscorbyn.co.uk) ¶
9 years ago
Since there's no apparent means of obtaining all the *private* properties in an object I wrote a little function to do it.  Built in support would be much more efficient since mine uses a preg_  search to do this....

<?php

function get_private_properties($obj, $inside=false)
{
    $obj_dump  = print_r($obj, 1);
    preg_match_all('/^\s+\[(\w+):private\]/m', $obj_dump, $matches);
    if ($inside)
    {
        $output = array();
        foreach ($matches[1] as $property)
        {
            $output[$property] = $obj->$property;
            return $output;
        }
    }
    else return $matches[1];
} 

?>

So if you run it with the optional second paramter missing you'll just get an array of the variable names that are private inside the class.  This is the only option if you are not inside the actual object and the object has no private properties inherited.

If you run it with the second parameter set to true you will get an associative array with the properties and their corresponding values.  I'd only advise to do that for singletons since you may get errors if there are any private properites in parents/children.
-1
pascal dot poncet at netconsult dot com ¶
9 years ago
Subject: using "sql_calc_found_rows" in a MySQL query while exploiting result in a PHP db class object.

Hello,

There is a nice function in MySQL that allows to know how many records would have been returned if no "where" clause were set : SQL_CALC_FOUND_ROWS.

If you have create a db object to collect the returned lines, you will be a little perplex when trying to call the result of this function.

Why ?
Simply because the returned field's name is "found_rows()" and obviously it's not possible to call something like :

<?php $result->found_rows() ?>

...as it will try to acces a method, not a property !

Then, the only way to get the right result seems to be the use of a class function, like :

<?php
  $db->query("select found_rows()");
  $count=current(get_object_vars(current($db->result)));
?>

Of course, if somebody found an other way to solve it, like a special syntax (see the one used with curled arrays in a string), I'm really open to discuss.

Good luck,
Pascal
-1
stachnik at gmail dot com ¶
10 years ago
In PHP5 to get an array with all properties (even the private ones) all you have to do is write a public method that returns an array for your class:

public function getArray()
{
  return get_object_vars($this);
}

and then

$myBeautifulArray = $myBeautifulObject->getArray ();

Have BEAUTIFUL day :)
-2
elminster2031 at hotmail dot com ¶
5 years ago
Also note that this is recursive. For example:

<?php
class Sarah{

    private $Father;
    private $Mother;

    public function __construct(){
        $this->Father    =    NULL; //I don't know Sarah's Father
        $this->Mother    =    NULL; //I don't know Sarah's Mother
    }
}
class John_Connor{

    private $Father;
    private $Mother;

    public function __construct(){
        $this->Father    =    $this; //John went back in time and fathered himself
        $this->Mother    =    new Sarah(); //Sarah was his mom and his mate ewww
    }

    public function showParents(){
        return get_object_vars($this);
    }
}

$John    =    new John_Connor();
var_dump($John->showParents());
?>

You will see this outputs:

array(2) {
  ["Father"]=>
  object(John_Connor)#1 (2) {
    ["Father":"John_Connor":private]=>
    object(John_Connor)#1 (2) {
      ["Father":"John_Connor":private]=>
      *RECURSION*
      ["Mother":"John_Connor":private]=>
      object(Sarah)#2 (2) {
        ["Father":"Sarah":private]=>
        NULL
        ["Mother":"Sarah":private]=>
        NULL
      }
    }
    ["Mother":"John_Connor":private]=>
    object(Sarah)#2 (2) {
      ["Father":"Sarah":private]=>
      NULL
      ["Mother":"Sarah":private]=>
      NULL
    }
  }
  ["Mother"]=>
  object(Sarah)#2 (2) {
    ["Father":"Sarah":private]=>
    NULL
    ["Mother":"Sarah":private]=>
    NULL
  }
}
-1
nick_eby at bonzidev dot com ¶
13 years ago
Furthermore, variables not declared in the class but set on a given object, will be returned by get_object_vars().

Example, ver. 4.2.1:
<?
class MyTest {
        var $classVar1 = 'Class Var 1';
        var $classVar2;
        var $classVar3;

        function MyTest()
        {
                $this->classVar2 = 'class var 2';
        }
}

$test = new MyTest();
// This var isn't declared in the class
$test->newObjVar = 'foobar';

echo "<pre>";
print_r(get_object_vars($test));
echo "</pre>";
?>

The output is:
Array
(

    [classVar1] => Class Var 1
    [classVar2] => class var 2
    [classVar3] => 
    [newObjVar] => foobar
)

Prior to version 4.2, classVar3 would not be output as it was never assigned a value.
-2
huzursuz at mailinator dot com ¶
6 years ago
better version of conv_obj, based on XML... this converts XML to an array... use it by

<?php
$result = xmlobj2arr(simplexml_load_string($xmlContent));

function xmlobj2arr($Data) {
       if (is_object($Data)) {
               foreach (get_object_vars($Data) as $key => $val) {
                       $ret[$key] = xmlobj2arr($val);
               }
               return $ret;
       } elseif (is_array($Data)) {
               foreach ($Data as $key => $val) {
                       $ret[$key] = xmlobj2arr($val);
               }
               return $ret;
       } else {
               return $Data;
       }
}
?>
来自  http://php.net/manual/zh/function.get-object-vars.php
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