在 php 中使用 foreach 循环难以将键 => 值对添加到多维关联数组

Question

我正在使用多维关联数组来存储用户输入，以便稍后插入 mysql UPDATE 语句。

$updateFields = array();
foreach($fields as $column => $field){
    if (isset($_POST[$field]) && !empty($_POST[$field])){
        if($column == "a" || $column == "b" || $column == "c" || $column == "d" || $column == "e" || $column == "f" || $column == "g" ){
            $updateFields[0] = [$column => "$_POST[$field]"];
        }
        else if($column == "h" || $column == "i"){
            $updateFields[1] = [$column => "$_POST[$field]"];
        }
        else if($column == "j" || $column == "k" || $column == "l" || $column == "m"){
            $updateFields[2] = [$column => "$_POST[$field]"];
        }
    }
}

我正在使用的上面的布局创建了数组，但是 仅存储 'child' 关联数组的最后 key:value 对 'parent' 关联数组。

使用 print_r 的可视化：

Array (
       [0] => Array (
              [g] => value
              ) 
       [1] => Array (
              [i] => value 
              ) 
       [2] => Array ( 
              [m] => value 
              ) 
       )

我想要完成的事情：

Array ( 
       [0] => Array (
              [a] => value 
              [b] => value 
              [c] => value 
              [d] => value 
              [e] => value 
              [f] => value 
              [g] => value 
              ) 
       [1] => Array ( 
              [h] => value 
              [i] => value 
              ) 
       [2] => Array ( 
              [j] => value 
              [k] => value 
              [l] => value 
              [m] => value 
              ) 
       )

我在 Whosebug 上看到多个线程涉及在关联数组中插入 key:pair 值，所以我希望这不符合重复条件。如果有人感兴趣，我很乐意提供更多信息。

Answer 1

试试这个...

$updateFields = array();
foreach($fields as $column => $field){
    if (isset($_POST[$field]) && !empty($_POST[$field])){
        if($column == "a" || $column == "b" || $column == "c" || $column == "d" || $column == "e" || $column == "f" || $column == "g" ){
            $updateFields[0][$column] = $_POST[$field];
        }
        else if($column == "h" || $column == "i"){
            $updateFields[1][$column] = $_POST[$field];
        }
        else if($column == "j" || $column == "k" || $column == "l" || $column == "m"){
            $updateFields[2][$column] = $_POST[$field];
        }
    }
}

Answer 2

试试这个代码这个代码可以工作

$fields = $_POST;
$updateFields = array();
foreach($fields as $column => $field){
    if (isset($column[$field]) && !empty($column[$field])){
        if($column == "a" || $column == "b" || $column == "c" || $column == "d" || $column == "e" || $column == "f" || $column == "g" ){
            $updateFields[0][$column] =$field;
        }
        else if($column == "h" || $column == "i"){
            $updateFields[1][$column] = $field;
        }
        else if($column == "j" || $column == "k" || $column == "l" || $column == "m"){
            $updateFields[2][$column] = $field;
        }
    }
}
echo "<pre>";print_r($updateFields);

在 php 中使用 foreach 循环难以将键 => 值对添加到多维关联数组

difficulty adding a key => value pair to a multidimensional associative array using a foreach loop in php

php

mysql

associative-array

multidimensional-array

form-processing