Hope someone can help me coming forward with this.
I have built a function that give back a string like this.
$class = 7c,9a,6a,9,8b
If single number exist (in this line 9) I need to remove it when exist in a combination of a letter a,b,c,d. The same if are single 7,6 or something.
I can’t remove all single letter. Should just be removed if exist in combination (number + letter).
The speed is important so hope find best way to do it. Thanks