interface.iQuestionCondition.php

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<?php
interface iQuestionCondition {

        const StringResultExpression = '~TEXT~';
        const PercentageResultExpression = '%n%';
        const NumericResultExpression = '#n#';
        const MatchingResultExpression = ';n:m;';
        const OrderingResultExpression = '$n,m,o,p$';
        const NumberOfResultExpression = '+n+';
        const ExclusiveResultExpression = '*n,m,o,p*';
        const EmptyAnswerExpression = "?";

        public function getOperators($expression);

        public function getExpressionTypes();

        public function getUserQuestionResult($active_id, $pass);

        public function getAvailableAnswerOptions($index = null);
}