(PHP 7 >= 7.3.0, PHP 8)
gc_status — Gets information about the garbage collector
This function has no parameters.
Returns an associative array with the following elements:
"runs""collected""threshold""roots""running""protected""full""buffer_size""application_time""collector_time""destructor_time""free_time"| Version | Description |
|---|---|
| 8.3.0 | gc_status() now returns the following additional fields: "running", "protected", "full", "buffer_size", "application_time", "collector_time", "destructor_time", and "free_time". |
Example #1 gc_status() Usage
<?php
// create object tree that needs gc collection
$a = new stdClass();
$a->b = [];
for ($i = 0; $i < 100000; $i++) {
$b = new stdClass();
$b->a = $a;
$a->b[] = $b;
}
unset($a);
unset($b);
gc_collect_cycles();
var_dump(gc_status());The above example will output something similar to:
array(4) { ["runs"]=> int(5) ["collected"]=> int(100002) ["threshold"]=> int(50001) ["roots"]=> int(0) }Output of the above example in PHP 8.3 is similar to:
array(12) { ["running"]=> bool(false) ["protected"]=> bool(false) ["full"]=> bool(false) ["runs"]=> int(5) ["collected"]=> int(100002) ["threshold"]=> int(50001) ["buffer_size"]=> int(131072) ["roots"]=> int(0) ["application_time"]=> float(0.031182458) ["collector_time"]=> float(0.020106291) ["destructor_time"]=> float(0) ["free_time"]=> float(0.003707167) }