(PHP 5 >= 5.5.0, PHP 7)
Get the boolean value of a variable
boolean boolval ( mixed $var )
Returns the boolean value of var
.
Parameters:
var
The scalar value being converted to a boolean.
Returns:
The boolean value of var
.
Examples:
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:
intval() -
strval() -
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