<?php
// given:
unset($undef);
$null = NULL;
$false = FALSE;
$true = TRUE;
// these operations:
var_dump(isset($var));
var_dump(empty($var));
var_dump(array_key_exists('var', $GLOBALS)); // "defined" below
- Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.1 - 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, 5.6.7 - 5.6.21, 7.0.5 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
- bool(false)
bool(true)
bool(false)
- Output for 7.0.0 - 7.0.4
- bool(false)
bool(true)
bool(true)
- Output for 5.1.0
- Fatal error: fatal flex scanner internal error--end of buffer missed in /in/90GbJ on line 11
Process exited with code 255.
preferences:
230.98 ms | 401 KiB | 343 Q