gc_status

(PHP 7 >= 7.3.0)

gc_status — Gets information about the garbage collector

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gc_status ( void ) : array

Gets information about the current state of the garbage collector.

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Returns an associative array with the following elements:

  • "runs"
  • "collected"
  • "threshold"
  • "roots"

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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());

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array(4) {
  ["runs"]=>
  int(5)
  ["collected"]=>
  int(100002)
  ["threshold"]=>
  int(50001)
  ["roots"]=>
  int(0)
}