How to merge 3 arrays keeping their meta key? - php

Question

I'm Getting some arrays from some wordpress custom fields:
$content = array(get_post_meta($postId, 'content'));
$media = array(get_post_meta($postId, 'media'));
$yt = array(get_post_meta($postId, 'youtube'));
I then need to have it printing in sequence, like:
media
content
LInk
Embed
And repeat the sequence for each value
media
content
LInk
Embed
For the sequence I'd use this:
echo '<ul>';
for ($i = 0; $i < count($all_array['media']); $i++) {
for ($j = 0; $j < count($all_array['content']); $j++) {
for ($k = 0; $k < count($all_array['youtube']); $k++) {
echo '<li>media->' . $all_array['media'][$i] . '</li>';
echo '<li>content->' . $all_array['content'][$j] . '</li>';
echo '<li>link->' . $all_array['link'][$k] . '</li>';
}
}
}
echo '</ul>';
But I'm doing something wrong with the merging of the 3 fields as if I do a var_dump before to run the for bit, like
echo '<pre>' . var_export($all_array, true) . '</pre>';
Then this is what I get and I cannot iterate as I wish:
array (
0 =>
array (
0 =>
array (
0 => '
brother
',
1 => '
Lorem
',
2 => '
End it
',
),
1 =>
array (
0 => '337',
1 => '339',
),
2 =>
array (
0 => 'https://www.youtube.com/watch?v=94q6fzbJUfg',
),
),
)
Literally the layout in html that I'm looking for is:
image
content
link
image
content
link
...
UPDATE
This how I am merging the arrays:
foreach ( $content as $idx => $val ) {
$all_array[] = [ $val, $media[$idx], $yt[$idx] ];
}
This is the associative array how it looks like:
Content:
array (
0 =>
array (
0 => '
brother
',
1 => '
Lorem
',
2 => '
End it
',
),
)
Media
array (
0 =>
array (
0 => '337',
1 => '339',
),
)
Youtube
array (
0 =>
array (
0 => 'https://www.youtube.com/watch?v=94q6fzbJUfg',
),
)

Answer 1

The way I've resolved it is first I calculate the tot. items within each array, then I get the array with max items and loop and add the items in sequence:
//GET CUSTOM FIELDS
$content = get_post_meta($post_to_edit->ID, 'content', false);
$media = get_post_meta($post_to_edit->ID, 'media', false);
$yt = get_post_meta($post_to_edit->ID, 'youtube', false);
$max = max(count($content), count($media), count($yt));
$combined = [];
//
// CREATE CUSTOM FIELDS UNIQUE ARRAY
for($i = 0; $i <= $max; $i++) {
if(isset($media[$i])) {
$combined[] = ["type" => "media", "value" => $media[$i]];
}
if(isset($content[$i])) {
$combined[] = ["type" => "content", "value" => $content[$i]];
}
if(isset($yt[$i])) {
$combined[] = ["type" => "youtube", "value" => $yt[$i]];
}
}
Finally I can loop:
foreach ($combined as $key => $val) {
if($val['type'] === "media") {
...
}
if($val['type'] === "content") {
...

Answer 2

You don't need to merge the arrays together. It will work fine in separate arrays. However, your for loops don't have the right logic. Try:
for ($i = 0; $i < count($media); $i++) {
for ($j = 0; $j < count($media[$i]); $j++) {
echo '<li>media->' . $media[$i][$j] . '</li>';
}
for ($j = 0; $j < count($content[$i]); $j++) {
echo '<li>content->' . $content[$i][$j] . '</li>';
}
for ($j = 0; $j < count($youtube[$i]); $j++) {
echo '<li>link->' . $youtube[$i][$j] . '</li>';
}
}