card/make/controller/shangjia.php

<?php

$id = $_GET['id'];

include_once("../../untils/conn.php");

if ($con) {
  mysqli_query($con, "set names utf8");

  $sql = "SELECT state FROM list WHERE id = '$id'";
  $result = mysqli_query($con, $sql);

  if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
      $state = $row["state"];
    }
  } else {
    echo "未找到匹配的记录";
  }

  if ($state == 0) {
    $new_state = 1;
  } else {
    $new_state = 0;
  }

  mysqli_query($con, "set names utf8");

  $sql = "UPDATE `list` SET state = '$new_state' WHERE id = '$id'";
  if ($con->query($sql) === TRUE) {
    echo "<script>alert('修改信息成功');window.location.href='../list.php'</script>";
  } else {
     echo "<script>alert('修改失败');window.location.replace(document.referrer)</script>";
    // echo "Error updating record: " . $con->error;
  }
}