   #PHP Manual Variable Functions is_array is_callable

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                                    is_bool

   (PHP 4 )
   is_bool --  Finds out whether a variable is a boolean

Description

   bool is_bool ( mixed var)

   Returns TRUE if the var parameter is a boolean.

   Example 1. is_bool() examples
   <?php
   $a = false;
   $b = 0;
   // Since $a is a boolean, this is true
   if (is_bool($a)) {
       echo "Yes, this is a boolean";
   }
   // Since $b is not a boolean, this is not true
   if (is_bool($b)) {
       echo "Yes, this is a boolean";
   }
   ?>

   See also is_array(), is_float(), is_int(), is_integer(), is_string(),
   and is_object().
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