<?php
$test = array("", NULL, 0, 1, "0", "1", true, false, new stdClass(), array(1), array());
echo "X\t!!(x)\t(x==true)\t(x===true)=\n\n";
foreach($test as $t) {
echo var_export($t, true) . "\t" . var_export((!!$t), true) . "\t" . var_export(($t==true),true). "\t" . var_export(($t===true),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 - 8.3.6
- X !!(x) (x==true) (x===true)=
'' false false false
NULL false false false
0 false false false
1 true true false
'0' false false false
'1' true true false
true true true true
false false false false
(object) array(
) true true false
array (
0 => 1,
) true true false
array (
) false false 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 !!(x) (x==true) (x===true)=
'' false false false
NULL false false false
0 false false false
1 true true false
'0' false false false
'1' true true false
true true true true
false false false false
stdClass::__set_state(array(
)) true true false
array (
0 => 1,
) true true false
array (
) false false false
- Output for 5.0.0 - 5.0.5
- X !!(x) (x==true) (x===true)=
'' false false false
NULL false false false
0 false false false
1 true true false
'0' false false false
'1' true true false
true true true true
false false false false
class stdClass {
} true true false
array (
0 => 1,
) true true false
array (
) false false false
- Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
- X !!(x) (x==true) (x===true)=
'' false false false
NULL false false false
0 false false false
1 true true false
'0' false false false
'1' true true false
true true true true
false false false false
class stdClass {
} false false false
array (
0 => 1,
) true true false
array (
) false false false
preferences:
230.44 ms | 402 KiB | 343 Q