$green = array(
0 = & gtarray(" name " = >；" c "，" score " = >；90),
1= >array(" name " = >；" a "，" score " = & gt80),
2 = & gtarray(" name " = >；" d "，" score " = & gt80),
3 = & gtarray(" name " = >；" b "，" score " = >；70),
4 = & gtarray(" name " = >；" e "，" score " = >；60),
);
//排名1 2 2 4 5
//名稱C A D B E
//成績90 80 80 70 60
foreach($ green as $ k = & gt；$v){
if ($k == 0){
$ green[$ k][' site ']= 1；
}否則{
$ lk = $ k-1；
if ($green[$k]['score']！= $green[$lk]['score']){
$ NK = $ k+1；
$ green[$ k][' site ']= $ NK；
}否則{
$ green[$ k][' site ']= $ k；
}
}
}
這是結果
數組(5) {
[0]= >
數組(3) {
[" name "]= & gt；字符串(1) "c "
[" score "]= & gt；int(90)
[" site "]= & gt；int(1)
}
[1]= >
數組(3) {
[" name "]= & gt；字符串(1) "a "
[" score "]= & gt；int(80)
[" site "]= & gt；int(2)
}
[2]= >
數組(3) {
[" name "]= & gt；字符串(1) "d "
[" score "]= & gt；int(80)
[" site "]= & gt；int(2)
}
[3]= >
數組(3) {
[" name "]= & gt；字符串(1) "b "
[" score "]= & gt；int(70)
[" site "]= & gt；int(4)
}
[4]= >
數組(3) {
[" name "]= & gt；字符串(1) "e "
[" score "]= & gt；int(60)
[" site "]= & gt；int(5)
}
}