Weakref::release
(PECL weakref >= 0.1.0)
Weakref::release — Releases a previously acquired reference
Description
public bool Weakref::release ( void )Releases a previously acquired reference, potentially turning a strong reference back into a weak reference.
The Weakref instance maintains an internal acquired counter to track outstanding strong references. If the call to Weakref::release() is successful, this counter will be decremented by one. Once this counter reaches zero, the strong reference is turned back into a weak reference.
Parameters
This function has no parameters.
Return Values
Returns TRUE if the reference was previously acquired and thus could be released, FALSE otherwise.
Examples
Example #1 Weakref::release() example
<?php
class?MyClass?{
????public?function?__destruct()?{
????????echo?"Destroying?object!\n";
????}
}
$o1?=?new?MyClass;
$r1?=?new?Weakref($o1);
$r1->acquire();
echo?"Unsetting?o1...\n";
unset($o1);
$o2?=?$r1->get();
$r1->release();
echo?"Unsetting?o2...\n";
unset($o2);
?>The above example will output:
Unsetting o1...
Unsetting o2...
Destroying object!See Also
- Weakref::acquire() - Acquires a strong reference on that object
← Weakref::get
Weakref::valid →
? 1997–2017 The PHP Documentation GroupLicensed under the Creative Commons Attribution License v3.0 or later.
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