gc_mem_caches()

gc_mem_caches() — Reclaims memory used by the Zend Engine memory manager.

Built-in function of PHP 8.5. The manual lists it as available in PHP 7, PHP 8. This page is the reference card: signature, parameters and return value, plus the changelog and the example the manual provides.

Signature

gc_mem_caches(): int

Parameters

This function takes no parameters.

Return value

Returns the number of bytes freed.

Example

The PHP manual ships no example for gc_mem_caches(); the signature and the parameter table above are the contract.

All PHP 8.5 built-in functions

Reference card built from the PHP manual page gc_mem_caches() (PHP documentation, CC BY 3.0). The page is generated from the manual, so the wording of the parameter and return value text follows php.net.