FILTER_VALIDATE_BOOLEAN Filter
What is FILTER_VALIDATE_BOOLEAN in PHP?
Explanation
PHP FILTER_VALIDATE_BOOLEAN is used to check whether the given value is a valid boolean value or not.
Name: "boolean"
ID-number: 258
True, False, Null
<?php
$val="yes";
if(filter_var($val, FILTER_VALIDATE_BOOLEAN))
{
echo "Boolean Value";
}
else
{
echo "Not Boolean Value";
}
?>
Result :
Boolean Value
Name: "boolean"
ID-number: 258
Return values:
True, False, Null
Example :
<?php
$val="yes";
if(filter_var($val, FILTER_VALIDATE_BOOLEAN))
{
echo "Boolean Value";
}
else
{
echo "Not Boolean Value";
}
?>
Result :
Boolean Value
