(PHP 4, PHP 5, PHP 7)
Finds out whether a variable is a boolean
bool is_bool ( mixed $var )
Finds whether the given variable is a boolean.
Parameters:
var
The variable being evaluated.
Returns:
Returns TRUE
if var
is a boolean, FALSE
otherwise.
Examples:
is_bool() examples
<?php $a = false; $b = 0; // Since $a is a boolean, it will return true if (is_bool($a) === true) { echo "Yes, this is a boolean"; } // Since $b is not a boolean, it will return false if (is_bool($b) === false) { echo "No, this is not a boolean"; } ?>
See also:
is_int() -
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