(PHP 5 >= 5.0.0)
ArrayObject::offsetSet — Sets the value at the specified index to newval
Sets the value at the specified index to newval.
index
The index being set.
newval
The new value for the index.
没有返回值。
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);
?>
以上例程会输出：
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"
}
jerikojerk (2011-08-22 15:58:01)
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
)
)
)
n dot lenepveu at gmail dot com (2008-09-30 00:20:00)
If $index is null, $newval is naturally pushed onto the end of the array as ArrayObject::append