// default display_errors value is on ini_set('display_errors', Off); $display_errors = ini_get('display_errors'); echo "display_errors=$display_errors<br />"; echo "1/0<br />"; $a = 1/0; // nothing happened. ini_restore('display_errors'); echo "1/0<br />"; $a = 1/0;

---

Result:

Warning: Use of undefined constant Off - assumed 'Off' (this will throw an Error in a future version of PHP) in C:\vh\sample.diary.tw\6\ini.php on line 24
display_errors=Off
1/0
1/0

Warning: Division by zero in C:\vh\sample.diary.tw\6\ini.php on line 31