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(PHP 4, PHP 5)
get_object_vars — Liefert die öffentlichen Elemente eines Objekts
Liefert die öffentlich zugreifbaren nichtstatischen Properties des gegebenen Objekts object entsprechend der Sichtbarkeitsregeln.
Eine Objektinstanz.
Gibt ein assoziatives Array der definierten nicht-statischen Elemente des mit object spezifizierten Objekts zurück, auf die im aktuellen Sichtbarkeitsbereich zugegriffen werden kann. Wenn einem Element kein Wert zugewiesen wurde, wird es mit einem NULL-Wert zurückgegeben.
| Version | Beschreibung |
|---|---|
| vor 4.2.0 | Variablen, die in der Klasse deklariert sind, aber keinen Wert zugewiesen bekommen haben, werden nicht als Teil des Ergebnisarrays zurückgegeben. |
Beispiel #1 Nutzung der get_object_vars()-Funktion
<?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();
?>
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
array(2) {
["b"]=>
int(1)
["c"]=>
NULL
}
array(4) {
["a"]=>
NULL
["b"]=>
int(1)
["c"]=>
NULL
["d"]=>
NULL
}
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
}
}
Here is a function for getting only public properties even if you are in the class:
<?php
function my_get_object_vars($obj) {
$ref = new ReflectionObject($obj);
$pros = $ref->getProperties(ReflectionProperty::IS_PUBLIC);
$result = array();
foreach ($pros as $pro) {
false && $pro = new ReflectionProperty();
$result[$pro->getName()] = $pro->getValue($obj);
}
return $result;
}
?>
Be aware of the fact that this is scope-sensitive. If you're calling this from an objects own method, then private and protected vars will be outputted as well. Call it from outside the object and the result will most likely be what you want to archive.
General purpose functions to convert an array (multidimensional) to object, and vice versa:
<?php
// From object to array.
function toArray($data) {
if (is_object($data)) $data = get_object_vars($data);
return is_array($data) ? array_map(__FUNCTION__, $data) : $data;
}
// From array to object.
function toObject($data) {
return is_array($data) ? (object) array_map(__FUNCTION__, $data) : $data;
}
?>
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;
}
}
?>
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
}
?>
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'
}
}
?>
This method returns all the public, private, and protected vars of a given object. There are some other solutions presented in the comments but they didn't seem to preserve arrays, etc..
Hope it can help someone...
<?php
function parseObject($obj, $values=true){
$obj_dump = print_r($obj, 1);
$ret_list = array();
$ret_map = array();
$ret_name = '';
$dump_lines = preg_split('/[\r\n]+/',$obj_dump);
$ARR_NAME = 'arr_name';
$ARR_LIST = 'arr_list';
$arr_index = -1;
// get the object type...
$matches = array();
preg_match('/^\s*(\S+)\s+\bObject\b/i',$obj_dump,$matches);
if(isset($matches[1])){ $ret_name = $matches[1]; }//if
foreach($dump_lines as &$line){
$matches = array();
//load up var and values...
if(preg_match('/^\s*\[\s*(\S+)\s*\]\s+=>\s+(.*)$/', $line, $matches)){
if(mb_stripos($matches[2],'array') !== false){
$arr_map = array();
$arr_map[$ARR_NAME] = $matches[1];
$arr_map[$ARR_LIST] = array();
$arr_list[++$arr_index] = $arr_map;
}else{
// save normal variables and arrays differently...
if($arr_index >= 0){
$arr_list[$arr_index][$ARR_LIST][$matches[1]] = $matches[2];
}else{
$ret_list[$matches[1]] = $matches[2];
}//if/else
}//if/else
}else{
// save the current array to the return list...
if(mb_stripos($line,')') !== false){
if($arr_index >= 0){
$arr_map = array_pop($arr_list);
// if there is more than one array then this array belongs to the earlier array...
if($arr_index > 0){
$arr_list[($arr_index-1)][$ARR_LIST][$arr_map[$ARR_NAME]] = $arr_map[$ARR_LIST];
}else{
$ret_list[$arr_map[$ARR_NAME]] = $arr_map[$ARR_LIST];
}//if/else
$arr_index--;
}//if
}//if
}//if/else
}//foreach
$ret_map['name'] = $ret_name;
$ret_map['variables'] = $ret_list;
return $ret_map;
}//method
?>
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($this);
}
Progressively simplifying the method of the previous post.
The first part of the simplification came when it was realised that everything being passed to it was being checked twice to see if it was an array or an object - once before the function is called, and once after the function had begin.
The latter pair of tests are retained so that they do not need to be made explicitly in other part of the program before calling the function in the first place.
<?php
function conv_obj($Data){
if(is_object($Data)){
foreach(get_object_vars($Data) as $key=>$val){
$ret[$key]=conv_obj($val);
}
return $ret;
}elseif(is_array($Data)){
foreach($Data as $key=>$val){
$ret[$key]=conv_obj($val);
}
return $ret;
}else{
return $Data;
}
}
?>
Reversing the tests to get the simplest case out of the way first.
<?php
function conv_obj($Data){
if(!is_object($Data) && !is_array($Data)) return $Data;
if(is_object($Data)){
foreach(get_object_vars($Data) as $key=>$val){
$ret[$key]=conv_obj($val);
}
return $ret;
}else{
foreach($Data as $key=>$val){
$ret[$key]=conv_obj($val);
}
return $ret;
}
}
?>
The only difference between the two loops is in what they are iterating over.
<?php
function conv_obj($Data){
if(!is_object($Data) && !is_array($Data)) return $Data;
if(is_object($Data)){
$vars = get_object_vars($Data);
foreach($vars as $key=>$val){
$ret[$key]=conv_obj($val);
}
return $ret;
}else{
$vars = $Data;
foreach($vars as $key=>$val){
$ret[$key]=conv_obj($val);
}
return $ret;
}
}
?>
Moving the common tail of the if statement's two branches:
<?php
function conv_obj($Data){
if(!is_object($Data) && !is_array($Data)) return $Data;
if(is_object($Data)){
$vars = get_object_vars($Data);
}else{
$vars = $Data;
}
foreach($vars as $key=>$val){
$ret[$key]=conv_obj($val);
}
return $ret;
}
?>
A lot of the time $vars===$Data, and when it doesn't we don't need $Data any more anyway, so we re-use the $Data variable instead of bringing in a new $vars variable, and then we can drop the do-nothing else branch:
<?php
function conv_obj($Data){
if(!is_object($Data) && !is_array($Data)) return $Data;
if(is_object($Data)) $Data = get_object_vars($Data);
foreach($Data as $key=>$val){
$ret[$key]=conv_obj($val);
}
return $ret;
}
?>
A case for using array_map():
<?php
function conv_obj($Data){
if(!is_object($Data) && !is_array($Data)) return $Data;
if(is_object($Data)) $Data = get_object_vars($Data);
$ret = array_map('conv_obj', $Data);
return $ret;
}
?>
And finally the return variable is otherwise unused:
<?php
function conv_obj($Data){
if(!is_object($Data) && !is_array($Data)) return $Data;
if(is_object($Data)) $Data = get_object_vars($Data);
return array_map('conv_obj', $Data);
}
?>
This is a slight modification of the previous poster's function. We ran into a problem using this function when we had a JS array nested inside a JS hash.
Something like this...
myHash = new Hash();
myHash[address] = new Array();
When we threw that at this function, it found the first hash as an object, and then using the previous poster's function, it did not consider the array as an "object." Instead it gave us a std_object type and we were unable to make any use of it.
The modification we made was adding a check for is_array inside both the is_object and is_array checks when you call the function. This checks for an array inside either an object or a nested array.
function conv_obj($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 $Data;
}
}
function conv_obj($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 $Data;
}
}
Very simple function to convert any Subobject to an array.
Created it while working with Soap.
For me as an beginner with PHP, very useful :o)
To add to my previous comment - the error message should have meant same structure.
As my implementation called for cross-class comparison.
If you're looking to compare to like objects this is a way you can do it:
<?
function objCompare($oA, $oB) {
$oVarsA=get_object_vars($oA);
$oVarsB=get_object_vars($oB);
if(($aKeys=array_keys($oVarsA)) !== array_keys($oVarsB)) {
$GLOBALS[err]=ERR(__CLASS__,__FUNCTION__,__FILE__,'',"Supplied objects are not of same class.");
return false;
} else {
foreach($aKeys as $sKey) {
if($oVarsA[$sKey] !== $oVarsB[$sKey]) {
$retAr[]=$sKey;
}
}
return $retAr;
}
}
$o=new Audit;
$o->_load(1);
$aDifferences=objCompare($o->oOldVersion, $o->oNewVersion);
echo "Between the compared objects, the variables below differ from eachother:<br/>";
print_r($aDifferences);
echo "<br/><br/><h2>For an automated output:</h2>";
foreach($aDifferences as $sVar) {
echo "OLD VERSION of var ".$sVar.":<br/>".$o->oOldVersion->{$sVar}."<br/><br/>";
echo "NEW VERSION of var ".$sVar.":<br/>".$o->oNewVersion->{$sVar}."<br/>";
echo "<hr>";
}
?>
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
<?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( $objSon );
?>
Hi all, I just wrote a function which dumps all the object propreties and its associations recursively into an array. Here it is..
<?php
function object_to_array($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($the_array);
?>
it will produce an array:
Array
(
[Fruits] => Array
(
[0] => Array
(
[_name] => Mango
[_color] => Green
[_weight] => 10
)
[1] => Array
(
[_name] => Apple
[_color] => Red
[_weight] => 15
)
[2] => Array
(
[_name] => Grape
[_color] => Purple
[_weight] => 5
)
)
[total_weight] => 30
)
I wish function like this could be usefull for you all. :)
Note that get_object_vars() returns the variables of the object not the class. You need to know if your class is extended from a parent class.
Since there's no apparent means of obtaining all the *private* properties in an object I wrote a little function to do it. Built in support would be much more efficient since mine uses a preg_ search to do this....
<?php
function get_private_properties($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.
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
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
$t3 = 43
Object Changed (print_r):
Test Object
(
[t1:private] => 73
[t2:protected] => 42
[t3] => 43
[d1:private] => 63
[d2:protected] => 32
[d3] => 33
)
Getting all class propertynames (print_r)
Array
(
[0] => Test
*/
?>
In PHP5 to get an array with all properties (even the private ones) all you have to do is write a public method that returns an array for your class:
public function getArray()
{
return get_object_vars($this);
}
and then
$myBeautifulArray = $myBeautifulObject->getArray ();
Have BEAUTIFUL day :)
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";
}
}
$Arr->PrintAll();
?>
actually, it's not entirely true that php5 will only return public members....php5 will return any variable IT HAS ACCESS TO
In other words, if you do a get_class_variables($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
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
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;
$obj->member=3;
A very powerful tool, for inspectors and what not.
Please note that you cannot affect the object via the array values...in other words, the returned array does not contain references to the values within the object, but copies.
If you are making an object inspector or editor, this is not good enough. So I made the following methods:
METHODS:
function &getVar($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"
}
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
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.
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
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;
}
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.
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.
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)
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