note 69036 deleted from language.oop5.decon by cmb
| From: | cmb@php.net | Date: | Sun, 08 Sep 2019 10:25:18 +0000 |
| Subject: | note 69036 deleted from language.oop5.decon by cmb | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-212137@lists.php.net to get a copy of this message | ||
Note Submitter: chanibal at deltasoft dot int dot pl dot SPAMPROTECT
----
Note that if a class contains another class, the contained class's destructor will be triggered
after the destructor of the containing class.
<?php
class contained {
protected $parent;
public function __construct(&$p) {
# $this->parent=&$p;
}
public function __destruct() {
/* unset $this->parent */
print 'contained ';
}
}
class containing {
protected $contained;
public function __construct() {
$this->contained=new contained($this);
}
public function __destruct() {
// unset($this->contained);
print 'containing ';
}
}
new containing();
?>
Will output
containing contained
After uncommenting the // comment, the output will change to
contained containing
Adding a reference from the contained class to the containing one (the # comment) will not change
that, but beware, because it can cause random errors in other destructors in the parts of the script
which seem unrelated! (PHP Version 5.1.2)