PHP/is bool
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< PHP
is_bool is a PHP function used to determine if a variable is a boolean data type.
boolean is_bool($variable)
$variable is any type of variable to be evaluated. The type of value the variable holds is inspected and no additional evaluation is performed. So a string, for example, containing the word "true" will not be considered a boolean.
is_bool returns true if the variable is a boolean and false otherwise.
Examples:
$boolean = true; $integer = 1; $string = 'true'; is_bool($boolean); // Returns true is_bool($integer); // Returns false is_bool($string); // Returns false
