Name keys within array from WordPress meta fields - php

Question

i am trying to code a calendar script within wordpress and custom post types. works fine so far. I use several custom fields (ACF) to call my desired parameters (event title, start_date, end_date, etc.)
I call the results by get_posts().
but I have a problem with naming my keys within the array. after the foreach operation I can get the desired values e.g. event_title by typing $posts[0] or start_date by $posts['1'].
how can I achieve that I can name the keys so that I can use $posts[title] or $posts['start_date'] in my output?
I have tried to build a second array an use array_combine, but this fails.
<?php
$args = array( 'post_type' => 'cpt_kalender', 'post_status' => 'publish', 'numberposts' => '-1', 'meta_key' => 'cf_termin_start', 'orderby' => 'meta_value_num', 'order' => 'ASC' );
$posts = get_posts( $args );
$group_posts = array();
foreach ( $posts as $post ) : setup_postdata( $post );
/*
Hole die Termine der einzelnen Startdaten
- Schreibe das Datumsformat yyyymmdd in yyyy-mm-dd um
*/
$titel = get_the_title();
$termin_datum_start = get_field('cf_termin_start');
$termin_datum_start = new DateTime($termin_datum_start);
$termin_datum_ende = get_field('cf_termin_ende');
$termin_datum_ende = new DateTime($termin_datum_ende);
$termin_jahr = $termin_datum_start->format('Y');
$termin_monat = $termin_datum_start->format('F');
$termin_tag = $termin_datum_start->format('d');
$post_id = get_the_ID();
$termin_start_uhrzeit_stunde = get_field('cf_termin_start_uhrzeit_stunde');
$termin_start_uhrzeit_minute = get_field('cf_termin_start_uhrzeit_minute');
$termin_ende_uhrzeit_stunde = get_field('cf_termin_ende_uhrzeit_stunde');
$termin_ende_uhrzeit_minute = get_field('cf_termin_ende_uhrzeit_minute');
$termin_schulfrei = get_field('cf_termin_schulfrei');
$termin_intern = get_field('cf_termin_intern');
/*
Fülle das Array mit den Werten
*/
$group_posts[$termin_jahr][$termin_monat][] = array(
$titel,
$termin_datum_start,
$termin_datum_ende,
$post_id,
$termin_start_uhrzeit_stunde,
$termin_start_uhrzeit_minute,
$termin_ende_uhrzeit_stunde,
$termin_ende_uhrzeit_minute,
$termin_schulfrei,
$termin_intern
);
endforeach; ?>
Is there any way to tell the array listed above the desired key names in the same foreach operation?
i am thankful for every hint. thx a lot. I am just learning php and this drives me nuts. :(

Answer 1

The part where you are adding the values to the $group_posts array. You can add keys to each item.
$group_posts[$termin_jahr][$termin_monat][] = array(
'title' => $titel,
'termin_datum_start' => $termin_datum_start,
'termin_datum_ende' => $termin_datum_ende,
'post_id' => $post_id,
'termin_start_uhrzeit_stunde' => $termin_start_uhrzeit_stunde,
'termin_start_uhrzeit_minute' => $termin_start_uhrzeit_minute,
'termin_ende_uhrzeit_stunde' => $termin_ende_uhrzeit_stunde,
'termin_ende_uhrzeit_minute' => $termin_ende_uhrzeit_minute,
'termin_schulfrei' => $termin_schulfrei,
'termin_intern' => $termin_intern
);
Then you can access a value like $group_posts['termin_jahr']['termin_monat']['title']
Since you are adding each item with termin_jahr and termin_monat You will need to provide those first to access the correct item's title.
Alternatively you can just add those variables inside of the array and access it later like below:
$group_posts = array(
'title' => $titel,
'termin_datum_start' => $termin_datum_start,
'termin_datum_ende' => $termin_datum_ende,
'post_id' => $post_id,
'termin_start_uhrzeit_stunde' => $termin_start_uhrzeit_stunde,
'termin_start_uhrzeit_minute' => $termin_start_uhrzeit_minute,
'termin_ende_uhrzeit_stunde' => $termin_ende_uhrzeit_stunde,
'termin_ende_uhrzeit_minute' => $termin_ende_uhrzeit_minute,
'termin_schulfrei' => $termin_schulfrei,
'termin_intern' => $termin_intern,
'termin_jahr' => $termin_jahr,
'termin_monat' => $termin_monat,
);
You can do a foreach loop on the $group_posts array and then access each item like below:
foreach($group_posts as $group_post) {
// Outputs $titel variable which you added to array above
echo $group_post['title'];
}