<?php
$tags = array(
array('tag_id' => 1, 'tag_name' => 'Hello', 'album_id' => 1),
array('tag_id' => 1, 'tag_name' => 'Hello', 'album_id' => 2),
array('tag_id' => 2, 'tag_name' => 'World', 'album_id' => 1),
array('tag_id' => 2, 'tag_name' => 'World', 'album_id' => 2),
array('tag_id' => 3, 'tag_name' => 'Again', 'album_id' => 3)
);
//$org_tags = array();
//foreach ($tags as $tag) {
//}
print_r(array_column('album_id', $tags));
preferences:
39.11 ms | 402 KiB | 5 Q