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      Finds whether a variable is NULL
      Variable handling Functions
      PHP Manual

      is_null

      (PHP 4 >= 4.0.4, PHP 5)

      is_null — Finds whether a variable is NULL

      Description

      bool is_null ( mixed $var )

      Finds whether the given variable is NULL.

      Parameters

      var

      The variable being evaluated.

      Return Values

      Returns TRUE if var is null, FALSE otherwise.

      See Also

      Variable handling Functions
      PHP Manual

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