Question

我有以下HTML代码：

<form method="POST" action="<?php echo htmlspecialchars($_SERVER['PHP_SELF']);?>">
Faculty ID:<input type="text" name="fid" id="fid" value=""> 
<span class="error">*</span><br><br>
 Sunday: <select name="sun[]" id="sunday" multiple="multiple">
    <option value="11">8:15-9:15</option>
    <option value="12">9:15-10:15</option>
    <option value="13">10:15-11:15</option>
    <option value="14">11:15-12:15</option>
    <option value="15">12:15-1:15</option>
    <option value="16">1:15-2:15</option>
    <option value="17">2:15-3:15</option>
    <option value="18">3:15-4:15</option>
    <option value="19">4:15-5:15</option>
  </select>  
  <span class="error">*</span><br><br>
<button type="submit" value="Submit">Submit</button>
</form>

如何将从下拉列表（星期日）中选择的多个值插入不同的列？

例如，如果选择8：15-9：15，则必须将值输入到表中的s1列，如果是9：15-10：15则必须输入我的MySQL表的s2列等等。

Answer 1

从下拉列表中获取选定变量

$sunday = array('-select time--', '8:15-9:15', '9:15-10:15' and so on);
$selected_key = $_POST['sun'];
$selected_val = $sun[$_POST['sun']];

将数据插入不同的表格

$query = "INSERT INTO `" . $selected_val . "`
VALUES ('".$x"','".$y."','".$z."')";

Answer 2

您可以将下拉选项存储到数组的键中，这些值是列名。然后，您可以检查选择了哪些选项，并将相应的列添加到另一个数组。然后插入数据：

   $columns = array(
      "8:15-9:15" => s1,
      "9:15-10:15" => s2,
      "10:15-11:15" => s3,
      "11:15-12:15" => s4,
      "12:15-1:15" => s5,
      "1:15-2:15" => s6,
      "2:15-3:15" => s7,
      "3:15-4:15" => s8,
      "4:15-5:15" => s9
   ); //create a map between the options and column names

   //retrieve the selected options to an array 
   $selectedOptions = $_POST['sun'];

   $selectedColumns = array();

   if(count($selectedOptions)) {
     //add the column name for each selected option to an array
     foreach ($selectedOptions as $option) {
       $selectedColumns[] = $columns[$option];
     }
     // create a string with the columns names
     $columnsToInsert = implode(", ", $selectedColumns);
     // create a string with the selected options
     $valuesToInsert = implode("', '", $selectedOptions);
     // create the query string
     $query = "INSERT INTO your_table('$columnsToInsert') VALUES ('" . $valuesToInsert ."')";
     // then you execute the query
   }

如何从下拉字段插入表的多个列

2 个答案: