gc_collect_cycles

Function • Return type changed in PHP 8.0

Forces collection of any existing garbage cycles.

PHP 5

PHP 7

Improved

PHP 8.1

PHP 8.2-8.3

PHP 8.4

PHP 8.5

PHP 8.6

`gc_collect_cycles` Function synopsis

gc_collect_cycles(): int

Parameters

gc_collect_cycles does not take any parameters.

Return value

Typeint

Returns number of collected cycles.

Changes to the `gc_collect_cycles` Function

PHP 8.0

Return type added: int

- gc_collect_cycles()
+ gc_collect_cycles(): int

`gc_collect_cycles` Function Availability

PHP Version	Availability
PHP 8.6Upcoming Release	Yes
PHP 8.5Supported (Latest)	Yes
PHP 8.4Supported	Yes
PHP 8.3Security-Fixes Only	Yes
PHP 8.2Security-Fixes Only	Yes
PHP 8.1Unsupported	Yes
PHP 8.0Unsupported	Yes
PHP 7.4Unsupported	Yes
PHP 7.3Unsupported	Yes
PHP 7.2Unsupported	Yes
PHP 7.1Unsupported	Yes
PHP 7.0Unsupported	Yes
PHP 5.6Unsupported	Yes
PHP 5.5Unsupported	Yes
PHP 5.4Unsupported	Yes
PHP 5.3Unsupported	Yes