<?php $question = ['name' => 'How many steps has your stair', 'price' => 10.00]; // price per step = 10 $steps = 5; if($steps >= 5 ) { $question['price'] = 8.00; echo $steps * $question['price']; } else { echo $steps * $question['price']; } // Databse now: // product: has { category_id } // product_question { id | product_id | question_id | price } // Manage the conditional price in the DB.
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