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      Finds out whether a variable is a boolean

      is_bool

      (PHP 4, PHP 5)

      is_bool — Finds out whether a variable is a boolean

      Description

      bool is_bool ( mixed $var )

      Finds whether the given variable is a boolean.

      Parameters

      var

      The variable being evaluated.

      Return Values

      Returns TRUE if var is a boolean, FALSE otherwise.

      Examples

      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";
      }
      ?>


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