<?php
$test = array("", NULL, 0, 1, "0", "1", true, false, new stdClass(), array(1), array());
foreach($test as $t) {
echo var_export($t, true) . ": !!(x)= " . var_export((!!$t), true) ."\n";
}
- Output for 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 - 8.3.4, 8.3.6
- '': !!(x)= false
NULL: !!(x)= false
0: !!(x)= false
1: !!(x)= true
'0': !!(x)= false
'1': !!(x)= true
true: !!(x)= true
false: !!(x)= false
(object) array(
): !!(x)= true
array (
0 => 1,
): !!(x)= true
array (
): !!(x)= false
- Output for 8.3.5
- Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
'': !!(x)= false
NULL: !!(x)= false
0: !!(x)= false
1: !!(x)= true
'0': !!(x)= false
'1': !!(x)= true
true: !!(x)= true
false: !!(x)= false
(object) array(
): !!(x)= true
array (
0 => 1,
): !!(x)= true
array (
): !!(x)= false
- Output for 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, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33
- '': !!(x)= false
NULL: !!(x)= false
0: !!(x)= false
1: !!(x)= true
'0': !!(x)= false
'1': !!(x)= true
true: !!(x)= true
false: !!(x)= false
stdClass::__set_state(array(
)): !!(x)= true
array (
0 => 1,
): !!(x)= true
array (
): !!(x)= false
- Output for 5.0.0 - 5.0.5
- '': !!(x)= false
NULL: !!(x)= false
0: !!(x)= false
1: !!(x)= true
'0': !!(x)= false
'1': !!(x)= true
true: !!(x)= true
false: !!(x)= false
class stdClass {
}: !!(x)= true
array (
0 => 1,
): !!(x)= true
array (
): !!(x)= false
- Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
- '': !!(x)= false
NULL: !!(x)= false
0: !!(x)= false
1: !!(x)= true
'0': !!(x)= false
'1': !!(x)= true
true: !!(x)= true
false: !!(x)= false
class stdClass {
}: !!(x)= false
array (
0 => 1,
): !!(x)= true
array (
): !!(x)= false
preferences:
270.29 ms | 402 KiB | 359 Q