一、对数组[21,25,11,32,12,35,55,77,66]
进行排序,输出结果为:[77 11 66 12 55 21 35 25 32]
//排序 结果:77 11 66 12 55 21 35 25 32
$arr = [21,25,11,32,12,35,55,77,66];
rsort($arr);
$i = 0;
$j = 8;
for ($k=0;$k<=8;$k++){
if($k%2==0){
$arrs[] = $arr[$i];
$i = $i+1;
}else{
$arrs[] = $arr[$j];
$j = $j-1;
}
}
echo "<pre>";
print_r($arr);
echo "<pre>";
print_r($arrs);
exit();