/**
* Clean up an input variable.
*
* @param mixed The input variable.
* @param int Filter bit mask. 1=no trim: If this flag is cleared and the
* input is a string, the string will have leading and trailing whitespace
* trimmed. 2=allow_raw: If set, no more filtering is performed, higher bits
* are ignored. 4=allow_html: HTML is allowed, but passed through a safe
* HTML filter first. If set, no more filtering is performed. If no bits
* other than the 1 bit is set, a strict filter is applied.
* @param string The variable type {@see JFilterInput::clean()}.
*/
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