Question

Short

Generating table with barcodes of items. Each item has exact quantity in database table. Fields in tables are limited: 65, if more then 65 then build a second table, then a third one…How to generate tables with this conditions?

Detailed

Let’s say we want to generate a table with 65 available fields (5×13).

My plan is the following

1. User selects items’ checkboxes
2. When user submits form, PHP gets values of checked checkboxes
3. PHP gets quantities of each item from database
4. Generating table

For ex. the quantity for item id 55 is 2 and for 56 is 4 then the table must look like that

My code looks like that (I know that it’s wrong, but I can’t figure out how it must be. There must be more than 5 counters: rows counter, columns counter, $_POST[‘id’] counter, items’ quantity counter, table counter (if total sum is more than 65))

UPDATE

    <?php
            $items = array();
            foreach ($_POST['checkbox'] as $id) {
                $stmt = $db->prepare("SELECT `qt` FROM `items` WHERE `id`=?");
                $stmt->bind_param('i', $id);
                $stmt->execute();
                $stmt->bind_result($qt);
                $stmt->fetch();
                $stmt->close();
                for ($cnt = 1; $cnt <= $qt; $cnt++)
                    $items[] = $id;
            }
            $i = 0;
            foreach ($items as $item) {
                for ($j = 0; $j < $item['quantity']; $j++) {

                    // check if it's the beginning of a new table
                    if ($i % 65 == 0)
                        echo '<table>';

                    // check if it's the beginning of a new row
                    if ($i % 5 == 0)
                        echo '<tr>';

                    echo '<td><img src="bc.php?id=' . $item['id'] . '" alt="' . $item['name'] . '" /></td>';

                    // check if it's the end of a row
                    if (($i - 1) % 5 == 0)
                        echo '</tr>';

                    // check if it's the end of a table
                    if (($i - 1) % 65 == 0)
                        echo '</tr></table>';

                    $i++;
                }
            }

// if the last row wasn't closed, close it
            if ($i % 5 != 0)
                echo '</tr>';

// if the last table wasn't closed, close it
            if ($i % 65 != 0)
                echo '</table>';
            ?>

Any suggestion?

Answer 1

EDIT 4

<?php

$i = 0;
foreach ($_POST['checkbox'] as $id) {
    $stmt = $db->prepare("SELECT `qt` FROM `items` WHERE `id`=?");
    $stmt->bind_param('i', $id);
    $stmt->execute();
    $stmt->bind_result($qt);
    $stmt->fetch();
    $stmt->close();

    for ($cnt = 1; $cnt <= $qt; $cnt++) {
        // check if it's the beginning of a new table
        if ($i % 65 == 0)
            echo '<table>';

        // check if it's the beginning of a new row
        if ($i % 5 == 0)
            echo '<tr>';

        echo sprintf('<td><img src="bc.php?id=%1$d" alt="%1$d" /></td>', $id);

        // check if it's the end of a row
        if (($i + 1) % 5 == 0)
            echo '</tr>';

        // check if it's the end of a table
        if (($i + 1) % 65 == 0)
            echo '</table>';

        $i++;
    }
}

// if the last table isn't full, print the remaining cells
if ($i % 65 != 0) {
    for ($j = $i%65; $j < 65; $j++) {
        if ($j % 65 == 0) echo '<table>';
        if ($j %  5 == 0) echo '<tr>';
        echo '<td></td>';
        if (($j + 1) %  5 == 0) echo '</tr>';
        if (($j + 1) % 65 == 0) echo '</table>';
    }
}