<?php
if (empty($mystring)) {
echo 'empty';
}
if ($mystring == null) {
echo 'null'; // and warning
}
if (!isset($mystring)) {
echo 'not set';
}
- Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
- empty
Warning: Undefined variable $mystring in /in/URa8J on line 6
nullnot set
- Output for 5.0.4 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0, 7.1.6 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.33
- empty
Notice: Undefined variable: mystring in /in/URa8J on line 6
nullnot set
- Output for 7.3.32 - 7.3.33
- emptynullnot set
- Output for 7.1.5
Process exited with code 137.- Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3
- empty
Notice: Undefined variable: mystring in /in/URa8J on line 6
nullnot set
preferences:
195.19 ms | 402 KiB | 310 Q