/**
* Return regex to match xml (p)rocessing (i)nstructions
*
* Quoted substring and heredoc type of substrings are allowed in PI. Key
* is the $option setting.
*
* @param string $target literal target, like 'php'
* @param int $option regex option
* @return string
* @access public
* @static
*/
public static function xmlProcessing($target = 'php', $option = RegExOption::OPTION_ALLOPTS)
{
return RegEx::stringWithOpenClose('<?' . $target, '?>', $option);
}
