How to use FILTER VALIDATE BOOLEAN in PHP
This article describe about FILTER_VALIDATE_BOOLEAN Filter in PHP.
FILTER_VALIDATE_BOOLEAN Filter
For validates value as a Boolean option FILTER_VALIDATE_BOOLEAN Filter used.
- Name: "boolean"
- ID-number: 258
Possible return values:
- Returns FALSE for "0", "false", "off" and "no"
- Returns TRUE for "1", "true", "on" and "yes"
- Returns NULL otherwise.
Example
<html>
<body>
<?php
$var="yes";
var_dump(filter_var($var, FILTER_VALIDATE_BOOLEAN));
?>
</body>
</html> |
Output
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