<?php
$setting = 'y2k_compliance';
echo 'Current value for \'' . $setting . '\': ' . ini_get($setting), PHP_EOL;
ini_set($setting, ini_get($setting) ? 0 : 1);
echo 'New value for \'' . $setting . '\': ' . ini_get($setting), PHP_EOL;
ini_restore($setting);
echo 'Original value for \'' . $setting . '\': ' . ini_get($setting), PHP_EOL;
?>
Результат выполнения данного примера:
Current value for 'y2k_compliance': 1
New value for 'y2k_compliance': 0
Original value for 'y2k_compliance': 1