There is an error in setting variable on this line:
$week_s1="_member_score_".$week._s1";
this line should be
$week_s1 ="_member_score_".$week."_s1";
There is an error in setting variable on this line:
$week_s1="_member_score_".$week._s1";
this line should be
$week_s1 ="_member_score_".$week."_s1";