<?php $a=['1','2','3']; switch ($s=random_int ( 1 , 100 )) { case $s<=10:echo $a[2];break;//10% case $s>=81:echo $a[1];break;//20% default: echo $a[0];//70% }
Standard input is empty
2121121311211212211131111111111111111111211112112211113211111112111111111311111121111112211112211212