求数组中最大数所在的下标,数组为 $arr = array(1,5,67,58,40,3,450,6,999,21);用for来实现。
$index = 0;
$arr = array(1,5,67,58,40,3,450,6,999,21);
$max = max($arr);
foreach( $arr as $k => $num) {
if($num === $max) {
$index = $k;
}
}
echo $index;