Weakref::__construct

(PECL weakref >= 0.1.0)

Constructs a new weak reference

public Weakref::__construct ( object $object )

Constructs a new weak reference.

Parameters:

object

The object to reference.

Returns:

No value is returned.

Examples:

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!

Links:

http://php.net/manual/en/weakref.construct.php

doc_php

2025-01-10 15:47:30

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