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ArrayObject::offsetSet

(PHP 5, PHP 7, PHP 8)

ArrayObject::offsetSetSets the value at the specified index to newval

Description

public ArrayObject::offsetSet(mixed $key, mixed $value): void

Sets the value at the specified index to newval.

Parameters

key

The index being set.

value

The new value for the key.

Return Values

No value is returned.

Examples

Example #1 ArrayObject::offsetSet() example

<?php
class Example {
public
$property = 'prop:public';
}
$arrayobj = new ArrayObject(new Example());
$arrayobj->offsetSet(4, 'four');
$arrayobj->offsetSet('group', array('g1', 'g2'));
var_dump($arrayobj);

$arrayobj = new ArrayObject(array('zero','one'));
$arrayobj->offsetSet(null, 'last');
var_dump($arrayobj);
?>

The above example will output:

object(ArrayObject)#1 (3) {
  ["property"]=>
  string(11) "prop:public"
  [4]=>
  string(4) "four"
  ["group"]=>
  array(2) {
    [0]=>
    string(2) "g1"
    [1]=>
    string(2) "g2"
  }
}
object(ArrayObject)#3 (3) {
  [0]=>
  string(4) "zero"
  [1]=>
  string(3) "one"
  [2]=>
  string(4) "last"
}

See Also

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User Contributed Notes 2 notes

up
3
jerikojerk
12 years ago
On my php 5.3.5 installation, i discovered that value can be set by reference and not by copy ... depending the context..

so this is différent from what a regular array()

<?php

function set(&$x, &$a )
{
$x[] = $a;
}

$x = new ArrayObject();
$y = array();
$z = new ArrayObject();

$a = array( 'foo' );
set($y,$a);
set($x,$a);
$z[]=$a;

$a = array( 'bar');

set($x,$a);
set($y,$a);
$z[]=$a;

print_r($x);
print_r($y);
print_r($z);
?>

// output
ArrayObject Object
(
[storage:ArrayObject:private] => Array
(
[0] => Array
(
[0] => bar
)

[1] => Array
(
[0] => bar
)

)

)
Array
(
[0] => Array
(
[0] => foo
)

[1] => Array
(
[0] => bar
)

)
ArrayObject Object
(
[storage:ArrayObject:private] => Array
(
[0] => Array
(
[0] => bar
)

[1] => Array
(
[0] => bar
)

)

)
up
2
n dot lenepveu at gmail dot com
15 years ago
If $index is null, $newval is naturally pushed onto the end of the array as ArrayObject::append
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