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Constructs a new weak reference


Weakref::__construct

(PECL weakref >= 0.1.0)

Weakref::__constructConstructs a new weak reference

Description

public Weakref::__construct ([ object $object ] )

Constructs a new weak reference.

Parameters

object

The object to reference.

Return Values

No value is returned.

Examples

Example #1 Weakref::__construct() example

<?php
class MyClass {
    public function 
__destruct() {
        echo 
"Destroying object!\n";
    }
}

$o1 = new MyClass;

$r1 = new Weakref($o1);

if (
$r1->valid()) {
    echo 
"Object still exists!\n";
    
var_dump($r1->get());
} else {
    echo 
"Object is dead!\n";
}

unset(
$o1);

if (
$r1->valid()) {
    echo 
"Object still exists!\n";
    
var_dump($r1->get());
} else {
    echo 
"Object is dead!\n";
}
?>

The above example will output:

 Object still exists! object(MyClass)#1 (0) { } Destroying object! Object is dead! 



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