多阵列组合

Question

我有一个工作更新，来自多个条目：

foreach(array_combine($_POST['eprof'] , $_POST['estudno']) as $prof => $sn){
    mysqli_query($con,"UPDATE  `table` SET  `studno` =  '$sn' WHERE  `students`.`id` = '$prof'") or die(mysqli_error());                                    
}
foreach(array_combine($_POST['eprof'] , $_POST['efn']) as $prof => $f){
    mysqli_query($con,"UPDATE  `table` SET  `fn` = '$f' WHERE  `students`.`id` = '$prof'") or die(mysqli_error());
}
foreach(array_combine($_POST['eprof'] , $_POST['emn']) as $prof => $m){
    mysqli_query($con,"UPDATE  `table` SET  `mn` ='$m' WHERE  `students`.`id` = '$prof'") or die(mysqli_error());
}

上面的代码来自选定的一个或多个学生，具体取决于选中的复选框。有没有办法用清洁器foreach 来做到这一点，比如将$sn、$fn、$m 合二为一？

foreach(
    array_combine(
      $_POST['eprof'] ,
      $_POST['estudno'],
      $_POST['efn'],
      $_POST['emn']
    ) as 
   $prof => $sn => $f => $m
){ "query here" }

这是正确的还是我做错了？

Answer 1

假设它们的键控相同：

foreach($_POST['eprof'] as $key => $prof){
    $sn = $_POST['estudno'][$key];
    $f  = $_POST['efn'][$key];
    $m  = $_POST['emn'][$key];

    mysqli_query($con, "UPDATE `table` SET `studno` =  '$sn', `fn` = '$f', `mn` ='$m'   
                        WHERE  `students`.`id` = '$prof'");
}

如果键控不同，您可以先在 3 个数组上运行 array_values() 以重新索引。