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Select mysql и выбор категорий

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В и шаблоне вот

<select name="category_id" size="3" multiple style="height: 300px;">
                <option value="0" selected="selected"><?php echo $text_none; ?></option>
                <?php foreach ($categories as $product_categories) { ?>
                <?php if ($product_categories['category_id'] == $category_id) { ?>
                <option value="<?php echo $product_categories['category_id']; ?>" selected="selected"><?php echo $product_categories['name']; ?></option>
                <?php } else { ?>
                <option value="<?php echo $product_categories['category_id']; ?>"><?php echo $product_categories['name']; ?></option>
                <?php } ?>
                <?php } ?>

Не выбирает несколько категорий, в mysql установлен INT(11)

Подскажите, как выбрать несколько категорий и записать их с помощью выбора этого select'a 

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В 23.09.2017 в 16:26, fanatic сказал:

в $_POST['category_jd']   будет массив выбранных пунктов

@fanatic Можно подробнее? Спасибо

Edited by hervam
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7 часов назад, hervam сказал:

Можно подробнее?

что подробней?  кроме 


нужно имя поля задать массивом   



в обработчике, перебираете  массив  $_POST['category']

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