Finds whether a variable is a native unicode or binary string is_bool is_callable Variable handling Functions PHP Manual is_buffer (No version information available, might be only in CVS)is_buffer — Finds whether a variable is a native unicode or binary string Description bool is_buffer ( mixed $var ) Finds whether the given variable is a native unicode or binary string. Parameters var The variable being evaluated. Return Values Returns TRUE if var is a native unicode or binary string, FALSE otherwise. See Also is_binary() is_string() is_unicode() is_bool is_callable Variable handling Functions PHP Manual