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Pepperoni

Разный класс для блоков товара в категории

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Добрый день, скажите как задать в цикле вывода товаров чередование классов, чтобы получалась "обертка" такого типа

<div class="1">
Товар первый (его фото и цена
</div>


<div class="2">
Товар второй (его фото и цена
</div>
 


<div class="3">
Товар третий (его фото и цена
</div>

Пробовал вставить стандартный класс PHP, но выдается ошибка  Notice</b>: Undefined variable: i

 
<div class="<?php strval($i++&1)?>">

 

 

Edited by Pepperoni

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Нужно же определить переменную
 

<?php $i = 0; ?>
<div class="<?php strval($i++&1)?>">

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