PHP - 基于键中的字符分离数组

Question

I have a PHP array from a submitted form that looks like the following

$form_data = Array (
    [input_1_1] => Product Name
    [input_1_2] => $8.00
    [input_1_3] => 2
    [input_2_1] => Other Product Name
    [input_2_2] => $3.50
    [input_2_3] => 8
)

I am looking for the best way to parse this so I can build something markup like this:

<table>
    <tr>
        <td>Product Name</td>
        <td>$8.00</td>
        <td>2</td>
    </tr>
    <tr>
        <td>Other Product Name</td>
        <td>$3.50</td>
        <td>8</td>
    </tr>
</table>

What would be most kosher way to do this?

Should I split this array into smaller arrays based on the 1st number (and then loop them)? Alternatively should I just build the markup based on sets of three, like:

<table>
    <tr>
        <td><?php echo $form_data[1]; ?></td>
        <td><?php echo $form_data[2]; ?></td>
        <td><?php echo $form_data[3]; ?></td>
    </tr>
    <tr>
        <td><?php echo $form_data[4]; ?></td>
        <td><?php echo $form_data[5]; ?></td>
        <td><?php echo $form_data[6]; ?></td>
    </tr>
</table>

Any help/advice appreciated.

Answer 1

$last_group = '';
foreach ($form_data as $key => $value) {
    preg_match('/input_(\d+)/', $key, $match);
    if ($match[1] != $last_group) {
        if ($last_group) {
            echo "</tr>
";
        }
        echo "<tr>
";
        $last_group = $match[1];
    }
    echo "<td>$value</td>
";
}
if ($last_group) {
    echo "</tr>
";
}

It would be better to structure your form like this, though:

<input type="text" name="name[]">
<input type="text" name="price[]">
<input type="text" name="quantity[]">

Then the $_POST['name'], $_POST['price'] and $_POST['quantity'] will be arrays, and you can iterate over them:

foreach ($_POST['name'] AS $i => $name) {
    $price = $_POST['price'][$i];
    $quantity = $_POST['quantity'][$i];
    // Output the table row
}