PHP FILTER_VALIDATE_BOOLEANT filter
Definition and Usage
FILTER_VALIDATE_BOOLEAN the filter value as a boolean option to verify.
- Name: "boolean"
- ID-number: 258
The possible return values:
- If it is "1", "true", "on" and "yes", then returns TRUE.
- If it is "0", "false", "off" and "no", it returns FALSE.
- Otherwise, it returns NULL.
Examples
<?php
$var="yes";
var_dump(filter_var($var, FILTER_VALIDATE_BOOLEAN));
?>
$var="yes";
var_dump(filter_var($var, FILTER_VALIDATE_BOOLEAN));
?>
Output code is as follows:
bool(true)
Complete PHP Filter Reference