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If you want to add another key to the results array add it to the query, and use @mac_gyver method.

... or ... $res = $pdo->query("SELECT Lvl , Sub FROM shadd_1 ORDER BY Lvl DESC, Sub "); $results = $res->fetchAll(PDO::FETCH_GROUP | PDO::FETCH_COLUMN); foreach ($results as $lvl => $arr) { echo "$lvl <UL>"; foreach ($arr as $sub) { echo "<li>$sub</li>"; } echo "</ul>"; } FYI - the $results array (slightly simpler than the $data array in above post) looks like this.. Array ( [ULE] => Array ( [0] => BASIC lug [1] => BASIC lug ) [ACE] => Array ( [0] => ger ) )

You need to use the MailJet API.

Never a good idea to allow for spaces in directories or file names. BTW, docker is a good way to locally simulate a deployment platform that differs from your development platform.

Sounds analagous to asking "How important is a knowledge of anatomy for being a surgeion?"

...Your question is how important it is for someone to know the fundamentals of what they're working with?