function myArrCompare($ar1, $ar2){
if($ar1[4] > $ar2[4])
return 1;
else if($ar1[4] < $ar2[4])
return -1;
else
return 0;
}uasort($aclass,'myArrCompare');
if($ar1[4] > $ar2[4])
return 1;
else if($ar1[4] < $ar2[4])
return -1;
else
return 0;
}uasort($aclass,'myArrCompare');
结果为
Array
(
[1] => Array
(
[0] => 2
[1] => 1
[2] => 应用技巧
[3] => PHP编程技巧总结
[4] => 1
) [2] => Array
(
[0] => 3
[1] => 2
[2] => 高级应用
[3] => PHP程序的高级应用
[4] => 2
) [0] => Array
(
[0] => 1
[1] => 3
[2] => 入门指南
[3] => PHP基础知识
[4] => 3
))
但由于使用的是uasort函数,所以虽然位置变了,但下标没变
若希望下标改变,请使用usort函数
usort($aclass,'myArrCompare');
结果为
Array
(
[0] => Array
(
[0] => 2
[1] => 1
[2] => 应用技巧
[3] => PHP编程技巧总结
[4] => 1
) [1] => Array
(
[0] => 3
[1] => 2
[2] => 高级应用
[3] => PHP程序的高级应用
[4] => 2
) [2] => Array
(
[0] => 1
[1] => 3
[2] => 入门指南
[3] => PHP基础知识
[4] => 3
))