如何从列到底显示表格？

Question

I have array:

$array = [
    'category1' => [
        'product33',
        'product41'
    ], 
    'category2' => [
        'product1',
        'product45'
    ], 
    'category3' => [
        'product65',
        'product23',
        'product423'
    ], 
];

How can I show this data from array in table from top to bottom?

This should looks this:

category1  | category 2 | category3
product33  | product1   | product65
product41  | product45  | product23
           |            | product423

I tried:

<table>
  <tr>
     <?php foreach ($array as $category): ?>
         <td><?php echo $category ?></td>
     <?php endforeach ?>
  </tr>
//????
</table>

Answer 1

I think your question is very similar to this

First calculate the $max_products. Then print header (category1, category2, etc). Then in nested loop print elements in rows to $max_products (you need to check if that category has element with index $i ofc).

$max_products = 0;

foreach($array as $category => $products){

    $current = count($products);

    if($current > $max_products){
        $max_products = $current;
    }
}?>

<table>
    <thead>
        <tr>
            <?php
                foreach( $array as $category => $products ){
                    echo "<th>$category</th>";
                }
            ?>
        </tr>
    </thead>
    <tbody>

        <?php for( $i = 0; $i < $max_products; $i++ ){ ?>
        <tr>

            <?php
                foreach( $array as $category => $products ){

                    if( $products[$i] ){
                        echo "<td>$products[$i]</td>";
                    } else {
                        echo "<td>&nbsp;</td>";
                    }

                }
            ?>

        </tr>
        <?php } ?>

    </tbody>
</table>