Build Array from Input Fields question

If two fields are named people[name], only the last value will be sent with the form. To be completely reliable, you’ll need to use an id for each person you’re collecting details on:

<input name="people[0][name]">
<input name="people[0][email]">
<input name="people[1][name]">
<input name="people[1][email]">
...

Use an incrementing counter in your while loop to do this ($i):

<?php
$i = 0;
while ( $posts->have_posts() ) {
    ...
    ?>
    <input name="people[<?php echo $i; ?>][name]">
    <?php
    $i++;
endwhile;
?>

You can use the empty array key format ([]) only if you don’t need to link other fields together.

<input name="people[name][]" type="text">

You’ll only receive non-empty field values, so empty fields will get tossed and your array key will get messed up. Consider the following situation:

<input name="people[name][]">
<input name="people[email][]">
<input name="people[name][]">
<input name="people[email][]">

If a user only filled out the second name field, the second name would have an array key of 0. You would have no way of linking the second name to the second email.

In the following situation:

<input name="people[][name]">
<input name="people[][email]">

Each new named field will be given a unique key in the index, so the email field would be at $_POST[1][email].

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