note 113647 added to function.array-fill
| From: | mchljnk at NOSPAM dot gmail dot com | Date: | Sun, 10 Nov 2013 03:07:09 +0000 |
| Subject: | note 113647 added to function.array-fill | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-197481@lists.php.net to get a copy of this message | ||
Using objects with array_fill may cause unexpected results. Consider the following:
<?php
class Foo {
public $bar = "banana";
}
//fill an array with objects
$array = array_fill(0, 2, new Foo());
var_dump($array);
/*
array(2) {
[0]=>
object(Foo)#1 (1) {
["bar"]=>
string(6) "banana"
}
[1]=>
object(Foo)#1 (1) {
["bar"]=>
string(6) "banana"
}
} */
//now we change the attribute of the object stored in index 0
//this actually changes the attribute for EACH object in the ENTIRE array
$array[0]->bar = "apple";
var_dump($array);
/*
array(2) {
[0]=>
object(Foo)#1 (1) {
["bar"]=>
string(5) "apple"
}
[1]=>
object(Foo)#1 (1) {
["bar"]=>
string(5) "apple"
}
}
*/
?>
Objects are filled in the array BY REFERENCE. They are not copied for each element in the array.
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Manual Page -- http://php.net/manual/en/function.array-fill.php
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