PHP FILTER_VALIDATE_BOOLEAN Filter
Complete PHP Filter Reference
Definition and Usage
The FILTER_VALIDATE_BOOLEAN filter validates value as a boolean option.
- Name: "boolean"
- ID-number: 258
Possible return values:
- Returns TRUE for "1", "true", "on" and "yes"
- Returns FALSE for "0", "false", "off" and "no"
- Returns NULL otherwise.
Example
<?php
$var="yes";
var_dump(filter_var($var, FILTER_VALIDATE_BOOLEAN));
?>
The output of the code will be:
bool(true)
Complete PHP Filter Reference
