Drodown選項數據庫

Question

我查詢不發送選擇狀態數據庫，

<?php 

    if(!isset($_SESSION)){ 

     session_start(); 
    } 


    $con=mysqli_connect("localhost", "root", "", "test"); 

    // Check connection 

    if (mysqli_connect_errno()) { 

     echo "Failed to connect to MySQL: " . mysqli_connect_error(); 
    } 

    // escape variables for security 
    $firstname = mysqli_real_escape_string($con, $_POST['firstname']); 
    $lastname = mysqli_real_escape_string($con, $_POST['lastname']); 
    $number = mysqli_real_escape_string($con, $_POST['number']); 
    $email = mysqli_real_escape_string($con, $_POST['email']); 
    $addressone = mysqli_real_escape_string($con, $_POST['addressone']); 
    $addresstwo = mysqli_real_escape_string($con, $_POST['addresstwo']); 
    $city = mysqli_real_escape_string($con, $_POST['city']); 
    $state = mysqli_real_escape_string($con, $_POST['state']); 
    $zip = mysqli_real_escape_string($con, $_POST['zip']); 


    $sql="UPDATE users SET `firstname`='$firstname', `lastname` = '$lastname',`number`='$number', `email` = '$email',`addressone`='$addressone', `addresstwo` = '$addresstwo',`city`='$city', `state` = '$state', `zip` = '$zip' WHERE `id`='" .$_SESSION['id']."'"; 



    if (!mysqli_query($con,$sql)) { 

     die('Error: ' . mysqli_error($con)); 
    } 
    header("Location:dashboard.php"); 

    mysqli_close($con); 

?> 

這種形式的部分是

<div class="form-group"> 

      <label class="col-md-5 control-label" for="state">State</label> 

       <div class="col-md-1"> 

        <select id="state" name="state" class="form-control" value="<?php echo $state; ?>"> 
         <option value="1">Select</option> 
         <option value="2">Alabama</option> 
         <option value="3">Alaska</option> 
         <option value="4">Arizona</option> 
         <option value="5">Arkansas</option> 
         <option value="6">California</option> 
         <option value="7">Colorado</option> 
         <option value="8">Connecticut</option> 
         <option value="9">Delaware</option> 
         <option value="10">District of Colombia</option> 
         <option value="11">Florida</option> 
         <option value="12">Georgia</option> 
         <option value="13">Hawaii</option> 
         <option value="14">Idaho</option> 
         <option value="15">Illinois</option> 
         <option value="16">Indiana</option> 
         <option value="17">Iowa</option> 
         <option value="18">Kansas</option> 
         <option value="19">Kentucky</option> 
         <option value="20">Louisiana</option> 
         <option value="21">Maine</option> 
         <option value="22">Maryland</option> 
         <option value="23">Massachusetts</option> 
         <option value="24">Michigan</option> 
         <option value="25">Minnesota</option> 
         <option value="26">Mississippi</option> 
         <option value="27">Missouri</option> 
         <option value="28">Montana</option> 
         <option value="29">Nebraska</option> 
         <option value="30">Nevada</option> 
         <option value="31">New Hampshire</option> 
         <option value="32">New Jersey</option> 
         <option value="33">New Mexico</option> 
         <option value="34">New York</option> 
         <option value="35">North Carolina</option> 
         <option value="36">North Dakota</option> 
         <option value="37">Ohio</option> 
         <option value="38">Oklahoma</option> 
         <option value="39">Oregon</option> 
         <option value="40">Pennsylvania</option> 
         <option value="41">Rhode Island</option> 
         <option value="42">South Carolina</option> 
         <option value="43">South Dakota</option> 
         <option value="44">Tennessee</option> 
         <option value="45">Texas</option> 
         <option value="46">Utah</option> 
         <option value="47">Vermont</option> 
         <option value="48">Washington</option> 
         <option value="49">West Virginia</option> 
         <option value="50">Wisconsin</option> 
         <option value="51">Wyoming</option> 
         <option value="52">American Samoa</option> 
         <option value="57">Federated States of Micronesia</option> 
         <option value="53">Guam</option> 
         <option value="58">Marshall Islands</option> 
         <option value="54">Northern Mariana Islands</option> 
         <option value="55">Puerto Rico</option> 
         <option value="56">Virgin Islands</option> 
         <option value="59">Palau</option> 
         <option value="60">AA</option> 
         <option value="61">AE</option> 
         <option value="62">AP</option> 
        </select> 
       </div> 
     </div> 

Answer 1

查詢是錯誤的

這一個

$sql="UPDATE users SET `firstname`='$firstname', `lastname` = '$lastname',`number`='$number', `email` = '$email',`addressone`='$addressone', `addresstwo` = '$addresstwo',`city`='$city', `state` = '$state', `zip` = '$zip' WHERE `id`='" .$_SESSION['id']."'"; 

刪除``

它應該是這樣的

$sql="UPDATE users SET firstname='$firstname', lastname = '$lastname',number='$number', email = '$email',addressone='$addressone', addresstwo= '$addresstwo',`city`='$city', state = '$state', zip = '$zip' WHERE id='" .$_SESSION['id']."'";