boolval

(PHP 5 >= 5.5.0, PHP 7, PHP 8)

boolvalGet the boolean value of a variable

Description

boolval(mixed $value): bool

Returns the bool value of value.

Parameters

value

The scalar value being converted to a bool.

Return Values

The bool value of value.

Examples

Example #1 boolval() examples

<?php
echo '0: '.(boolval(0) ? 'true' : 'false')."\n";
echo
'42: '.(boolval(42) ? 'true' : 'false')."\n";
echo
'0.0: '.(boolval(0.0) ? 'true' : 'false')."\n";
echo
'4.2: '.(boolval(4.2) ? 'true' : 'false')."\n";
echo
'"": '.(boolval("") ? 'true' : 'false')."\n";
echo
'"string": '.(boolval("string") ? 'true' : 'false')."\n";
echo
'"0": '.(boolval("0") ? 'true' : 'false')."\n";
echo
'"1": '.(boolval("1") ? 'true' : 'false')."\n";
echo
'[1, 2]: '.(boolval([1, 2]) ? 'true' : 'false')."\n";
echo
'[]: '.(boolval([]) ? 'true' : 'false')."\n";
echo
'stdClass: '.(boolval(new stdClass) ? 'true' : 'false')."\n";
?>

The above example will output:

0:        false
42:       true
0.0:      false
4.2:      true
"":       false
"string": true
"0":      false
"1":      true
[1, 2]:   true
[]:       false
stdClass: true

See Also