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ArrayObject::__construct

(PHP 5, PHP 7)

ArrayObject::__constructConstruit un nouvel objet tableau

Description

public ArrayObject::__construct ([ mixed $input = array() [, int $flags = 0 [, string $iterator_class = "ArrayIterator" ]]] )

Construit un nouvel objet tableau.

Liste de paramètres

input

Le paramètre input accepte un tableau ou un autre objet.

flags

Option de contrôle du comportement de l'objet ArrayObject. Voir la méthode ArrayObject::setFlags().

iterator_class

Spécifie la classe qui sera utilisée pour les itérations de l'objet ArrayObject.

Valeurs de retour

Retourne un objet ArrayObject en cas de succès.

Erreurs / Exceptions

Lance une exception InvalidArgumentException lorsque :

  • Le paramètre input n'est ni un tableau, ni un objet
  • Le paramètre flags n'est pas un entier
  • Le paramètre iterator_class n'est pas un objet implémentant la classe Iterator

Exemples

Exemple #1 Exemple avec ArrayObject::__construct()

<?php
$array 
= array('1' => 'one',
               
'2' => 'two',
               
'3' => 'three');

$arrayobject = new ArrayObject($array);

var_dump($arrayobject);
?>

L'exemple ci-dessus va afficher :

object(ArrayObject)#1 (3) {
  [1]=>
  string(3) "one"
  [2]=>
  string(3) "two"
  [3]=>
  string(5) "three"
}

Voir aussi

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User Contributed Notes 4 notes

up
2
german dot rumm at gmail dot com
11 years ago
BTW, if you need to change array later, use exchangeArray() method. Good to know when you are writing a class that extends ArrayObject()

AFAIK, exchangeArray() doesn't return anything.

<?php
    $a
= array('one', 'two', 'three');
   
$ao = new ArrayObject($a);

    foreach (
$ao as $element) {
        echo
$element . ' '; // one two three
   
}

   
$b = array('four', 'five', 'six');
   
$ao->exchangeArray($b); // returns null

   
foreach ($ao as $element) {
        echo
$element . ' '; // four five six
   
}
?>
up
-2
ashley at nospam dot zincdigital dot com
10 years ago
The great confusion with this class is in its naming.  ArrayObject infers it will behave as an Array and as an Object.  It won't.  It behaves as an array.  It would better be called ArrayType.  You can, with some work, get it to work both as an object and as an array, but that is up to you.
up
-3
Grigori Kochanov
13 years ago
As Marcus explained, the flag ArrayObject::SPL_ARRAY_AS_PROPS means the array element may be used as a property if there is no conflict with visible properties.

If there are visible properties in the class, the array element will not overwrite it's value.

<?php
class Rules extends ArrayObject {
    public
$len = 1;
    function
__construct($array){
       
parent::__construct($array,ArrayObject::ARRAY_AS_PROPS);
       
$this['len'] = 2;
    }
}
$x = new Rules(array(1,2));
echo
$x->len;
?>
Result: 1

<?php
class Rules extends ArrayObject {
    private
$len = 1;
    function
__construct($array){
       
parent::__construct($array,ArrayObject::ARRAY_AS_PROPS);
       
$this['len'] = 2;
    }
}
$x = new Rules(array(1,2));
echo
$x->len;
?>
Result: 2
up
-7
agalkin at agalkin dot ru
12 years ago
Note that the first argument to ArrayObject::__construct, the initial array, is passed by reference. Nevertheless, modification of the array doesn't modify the object, so it may cause unexpected behaviour.

<?php
$array
= array('foo' => 'initial');
$obj = new ArrayObject($array);

// array was passed by reference:
$obj['foo'] = 'modified';
var_dump($array); // foo => modified

// but it doesn't work backwards:
$array['foo'] = 'modified_again';
var_dump($obj); // foo => modified
var_dump($array); // foo => modified_again
?>
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