显示一列的唯一数组数据，但另一列显示多个项目

Question

I have a loop that's showing a contract and a location.

It's looping through and getting the contract name and the location per row. There are duplicate contracts in the rows so I only want to show one then list all the locations underneath it.

I know I can use something like array_unique(); to strip out the duplicates but not sure how to integrate that into my loop.

How can I show all the unique contracts and show multiple locations tied to that contract?

  <?php
  // Find all locations tied to the current logged in user.
  $args = array(
    'posts_per_page'    => -1,
    'post_type'     => 'locations',
    'meta_query'    => array(
        'relation'      => 'OR',
        array(
            'key'       => 'regional_operations_manager',
            'value'     => $user->id,
            'compare'   => 'LIKE'
        ),
    ),
  );
  // query
  $the_query = new WP_Query( $args ); ?>

  <?php if( $the_query->have_posts() ):
    while( $the_query->have_posts() ) : $the_query->the_post(); ?>
      <?php $clients[] = array('contract' => get_field('contract'), 'location' => get_the_title()); ?>
    <?php endwhile;
  endif;

  // Sort them alphabetically and only show unique locations.
  //$contracts = array_unique( $contracts );
  //sort($contracts);
  foreach ( $clients as $key => $row ) { ?>
    <?php echo $contract[$key] = $row['contract']; ?><br />
    <?php echo $location[$key] = $row['location']; ?><br />
  <?php } ?>

This is some of the data:

1. Adidas Viables 3 Viables Business

2. Aldi Bridgend

3. Aldi Pembroke Dock

4. Aldi Haverfordwest

The first word is the contract, the rest after that is the location.

I want to only show one "Aldi" with locations 2, 3 and 4 underneath it for example. So one unique contract can have multiple locations.

Answer 1

I'm not so fluent in wordpress but sure you could solve the order part via the wp_query . Either way, you could build your $clients array like so:

<?php if( $the_query->have_posts() ):
    while( $the_query->have_posts() ) : $the_query->the_post(); ?>
      <?php $clients[get_field('contract')]['locations'] = []; ?>
      <?php array_push($clients[get_field('contract')]['locations'], get_the_title()); ?>
    <?php endwhile; ?>
  <?php endif; ?>

That will create the $clients array looking something like this where you can foreach over it...

<?php

$clients['Adidas']['locations'] = [];
array_push($clients['Adidas']['locations'], 'Viables 3 Viables Business');

$clients['Aldi']['locations'] = [];
array_push($clients['Aldi']['locations'], 'Bridgend');
array_push($clients['Aldi']['locations'], 'Pembroke Dock');
array_push($clients['Aldi']['locations'], 'Haverfordwest');

foreach ($clients as $contract => $locations ) {
    echo 'Contract: ' . $contract . "\n";
    sort($locations['locations']); // this will sort the locations alphabetically
    foreach ($locations['locations'] as $location ) {
        echo ' - Location: ' . $location . "\n";
    }
}

Result looks like so:

Contract: Adidas
 - Location: Viables 3 Viables Business
Contract: Aldi
 - Location: Bridgend
 - Location: Haverfordwest
 - Location: Pembroke Dock

You can play with it here