(PHP 5 >= 5.3.0, PHP 7, PHP 8)
gc_collect_cycles — Force le passage du collecteur de mémoire
Cette fonction est actuellement non documentée ; seule la liste des arguments est disponible.
Force le passage du collecteur de mémoire.
Cette fonction ne contient aucun paramètre.
Retourne le nombre de cycles collectés.
(Since this function wasn't documented as of the date I left this note...)
If you came here looking for documentation, allow me to point you instead to a section in the user manual about garbage collection that includes a bit at the end about when you would use this feature and what it will actually do: http://php.net/manual/en/features.gc.collecting-cycles.php
Hope it helps!<?php gc_collect_cycles(); ?> triggers PHP's garbage collector to explicitly search for and clean up circular references - objects that reference each other but are no longer accessible by the program.
Although PHP's garbage collector runs automatically, in long-running scripts or memory-intensive operations (such as daemons, CLI tools, or large loops), calling this function manually can help reduce memory usage and prevent memory leaks.
Example:
<?php
class Node {
public $ref;
}
$a = new Node();
$b = new Node();
$a->ref = $b;
$b->ref = $a;
unset($a, $b);
// At this point, $a and $b are no longer accessible, but the circular reference remains in memory.
// Force cleanup:
$collected = gc_collect_cycles();
echo "Collected cycles: $collected\n";
?>