is_bool() is an inbuilt function in php. The is_bool() function is used to find whether a variable is a boolean or not.
Syntax:
boolean is_bool($variable_name)
$variable_name:the variable we want to check.
return value: It is a boolean function so returns TRUE when $variable_name is a boolean value, otherwise FALSE.
Example 1:
PHP
<?php
$variable_name1 = false;
$variable_name2 = 32;
if ( is_bool ( $variable_name1 ))
echo "Variable is a boolean. \n";
else
echo 'Variable is not a boolean. \n' ;
if ( is_bool ( $variable_name2 ))
echo '32 is a boolean.\n' ;
else
echo '32 is not a boolean.' ;
?>
|
Output:
Variable is a boolean.
32 is not a boolean.
Example 2:
PHP
<?php
function square( $num )
{
return ( is_bool ( $num ));
}
echo square(TRUE) ."\n";
echo square(FALSE) ."\n";
echo square(56) ."\n";
?>
|
Output:
1
1
Reference:http://php.net/manual/en/function.is-bool.php
Last Updated :
24 Apr, 2023
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