PHP 5.4.31 Released

Weakref::acquire

(PECL weakref >= 0.1.0)

Weakref::acquireAcquires a strong reference on that object

Descrierea

public bool Weakref::acquire ( void )

Acquires a strong reference on that object, virtually turning the weak reference into a strong one.

Parametri

Această funcție nu are parametri.

Valorile întoarse

Returns TRUE if the reference was valid and could be turned into a strong reference, FALSE otherwise.

Exemple

Example #1 Weakref::acquire() 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);
?>

Exemplul de mai sus va afișa:

Unsetting o1...
Unsetting o2...
Destroying object!

Example #2 Nested acquire/release example

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

$o1 = new MyClass;

$r1 = new Weakref($o1);

echo 
"Acquiring...\n";
$r1->acquire();

echo 
"  Unsetting...\n";
unset(
$o1);

echo 
"  Acquiring...\n";
$r1->acquire();

echo 
"    Acquiring...\n";
$r1->acquire();

echo 
"    Releasing...\n";
$r1->release();

echo 
"  Releasing...\n";
$r1->release();

echo 
"Releasing...\n";
$r1->release();

?>

Exemplul de mai sus va afișa:

Acquiring...
  Unsetting...
  Acquiring...
    Acquiring...
    Releasing...
  Releasing...
Releasing...
Destroying object!

Vedeți de asemenea

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