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PHP boolval() Function Usage and Example

PHP Available Functions

boolval The function is used to get the boolean value of a variable.

Version Requirement: PHP 5 >= 5.5.0, PHP 7.

Syntax

boolean boolval ( mixed $var )

Parameter Description:

$var: The variable to be converted to a boolean value.

Example

<?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";
?>

Execution results are as follows:

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

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