转换错误的编码 - MySQL

Question

我有一个带有 MySQL 数据库的站点，其中已经有很多数据，我在数据库的编码方面犯了一个错误，现在所有数据都不能通过“PHPMyAdmin”读取

现在我解决了编码问题，所有新数据都可读但旧数据不可读，问题出在与数据库的连接上，因为我没有添加“utf8”聊天集...

如果我从连接中删除 mysqli_set_charset($con,"utf8");，数据 OLD 是可读的 但随后 NEW 数据不可读。

有没有办法将错误的编码数据转换为正确的 UTF8？

例如带有 GOOD 和 BAD 行的图像：

Answer 1

好吧，我认为最好的解决方案是手动更新，

进行数据库备份、配置并将此文件放在您的网络服务器的任何位置并使用它。

编辑我忘了在这个表中添加一个名为 reconfigured 的新列

<?php

$server = "localhost";
$username = "root";
$password = "";
$database = "database";

$table = "corrupted table";

//utf8
$con = mysqli_connect($server, $username, $password, $database);
mysqli_set_charset($con,"utf8");
//auto
$con2 = mysqli_connect($server, $username, $password, $database);

if (isset($_GET['id']) and isset($_GET['which'])) {
  switch($_GET['which']) {
    case 1: $correct_string = mysqli_query($con, "SELECT name FROM `".$table." WHERE `id`='".$_GET['id']."'"); $correct_string = mysqli_fetch_row($con, $correct_string); break;
    case 2: $correct_string = mysqli_query($con2, "SELECT name FROM `".$table." WHERE `id`='".$_GET['id']."'"); $correct_string = mysqli_fetch_row($con2, $correct_string); break;
  }
  mysqli_query($con, "UPDATE `".$table."` SET `name` = '".$correct_string['0']."' WHERE `".$table."`.`id` = '".$_GET['id']."'");
  mysqli_query($con, "UPDATE `".$table."` SET `reconfigured` = '1' WHERE `".$table."`.`id` = '".$_GET['id']."'");
}

$string1 = mysqli_query($con, "SELECT name FROM `".$table."` WHERE reconfigured = '0' LIMIT 1");
$string2 = mysqli_query($con2, "SELECT name FROM `".$table."` WHERE reconfigured = '0' LIMIT 1");
  $string1 = mysqli_fetch_row($con, $string1);
  $string2 = mysqli_fetch_row($con2, $string2);
  $string1 = $string1['0'];
  $string2 = $string2['0'];
?>


<form action="">

    <input type="text" id="id" name="id" value="<?= $id ?>"></input><br>
    
  <input type="radio" id="which" name="which" value="1"><?= $string1 ?><br>

  <input type="radio" id="which" name="which" value="2"><?= $string2 ?><br><br>
  
  <input type="submit" value="continue">

  </form>

我没有测试过这个脚本，谨慎使用并进行数据库备份

编辑，这种方式是自动的，如果它有一个损坏的单词（如 œ），它会用另一种方法更新它，我仔细检查了代码，但你也检查了一个数据库再次备份，我有点不相信自己

<?php

$broken = array('×', '¢', 'œ', 'ª');
$server = "localhost";
$username = "root";
$password = "";
$database = "database";

$table = "corrupted table";

//utf8
$con = mysqli_connect($server, $username, $password, $database);
mysqli_set_charset($con,"utf8");
//auto
$con2 = mysqli_connect($server, $username, $password, $database);
$fixed = 0;
while ($fixed == 1) {
$string1 = mysqli_query($con, "SELECT name FROM `".$table."` WHERE reconfigured = '0' LIMIT 1");
$string2 = mysqli_query($con2, "SELECT name FROM `".$table."` WHERE reconfigured = '0' LIMIT 1");
  $string1 = mysqli_fetch_row($con, $string1);
  $string2 = mysqli_fetch_row($con2, $string2);
  if(implode(null,$string1) == null){ die('done'); }
  if(implode(null,$string2) == null){ die('done'); }
  $string1 = $string1['0'];
  $string2 = $string2['0'];
  
while ($found == 1) { 
foreach ($broken as $badword) {
if(strpos($string1, $badword)) { $found = 1; $broken = 1; }
} 
$found = 1;
}
if ($broken == 1) {
  mysqli_query($con, "UPDATE `".$table."` SET `name` = '".$string2."' WHERE `".$table."`.`id` = '".$id."'");

  
  
}
  mysqli_query($con, "UPDATE `".$table."` SET `reconfigured` = '1' WHERE `".$table."`.`id` = '".$id."'");
unset($broken);
unset($found);
}
?>