php - Regex how to get APT B NumberandLetter -

i want substring these:

apt b 234 miami or apt m234 miami 

i dont want choose miami or whatever city, apt (letter) (lettersandnumbers) last block has has @ least number

(apt.[a-z0-9]{1,}) 

could contains apt b 23-4 miami or apt m2-34 miami

apt\s+[a-z]\s*[a-z0-9]*[0-9]+[a-z0-9]* 

assuming characters require upper case