/**
* - Searches GET and POST data for the variable value matching $key.
* - Validates the value & returns an integer value only if the intput
* value is numeric.
* @param string $key Name of the input parameter holding the value of interest.
* @param integer $index (Optional) index within input array of the value of interest.
* @return mixed Float or integer value.
*/
public static function parseNumericInput($key, $index = null, $src = null)
{
$value = Validation::_parseInput(FILTER_VALIDATE_FLOAT, $key, $index, $src);
return is_numeric($value) ? $value : null;
}
