下拉列表保持選定的最後一個值輸入php

Question

我已經在php中創建了一個用戶配置文件頁面。用戶插入性別和電話號碼，所有這些都存儲在數據庫中的一個稱爲配置文件的表中。我的問題是，如何讓下拉列表保持用戶以前輸入的選定值。例如，如果用戶選擇男性，則下拉列表應將男性保留爲選定的選項，並且僅當用戶決定再次更改時才更改。

下面是代碼：

<form action="" method="POST" >  
<?php 

if (isset($_GET['success']) === true && empty($_GET['success'])===true){ 
    echo'Profile Updated Sucessfuly'; 
}else{ 
    if(empty($_POST) === false && empty($errors) === true){ 
     $update_data_profile = array('gender' => $_POST['gender'], 
               'telephone' => $_POST['telephone']); 

     update_user_profile($session_user_id, $update_data_profile); 
     header('Location: profile_update.php?success');        
     exit(); 
    }else if (empty($errors) === false){ 
     echo output_errors($errors); 
    } 
?> 


Gender<select name="gender" id="gender"> 
    <option value=" "> EMPTY </option> 
    <option value="Male">Male</option> 
    <option value="Female">Female</option> 
</select> 

Telephone <input name="telephone" type="text" size="25" /> 

<input type="submit" value="" name="submit"/></br> 

這是我用在數據庫中插入數據的功能：

function update_user_profile($user_id, $update_data_profile){ 

    $result = mysql_query("select user_id from profile where user_id = $user_id limit 1"); 

    $user_id = $update_data_profile['user_id'] ; 

    if(count($update_data_profile)){ 

    $columns = array(); 
    $values = array(); 

    foreach($update_data_profile as $field => $data){ 
    $columns[] = $field; 
    $values[] = $data; 
    } 
    } 

mysql_query(" INSERT INTO `profile` (" . implode(",", $columns) .") values ('" . implode("','", $values) . "')") or die (mysql_error()); 

Answer 1

你可以改變這樣的代碼：

<select name="gender" id="gender" default="Male"> 

Answer 2

由此您將得到邏輯

<select name="gender" id="gender"> 
<?php 
    if($_POST['gender'] == 'male' { 
    echo '<option value="Male" selected>Male</option>'; 
    } else { 
    echo '<option value="Female" selected>Female</option>'; 
?> 
</select> 

Answer 3

您可以在頁面加載期間檢索最後一個性別並添加所選選項。

<?php 
    result = mysql_fetch_array(mysql_query("SELECT user_id FROM profile ORDER BY user_id DESC LIMIT 1")); 
    $gender = $result['gender']; //you need to change the ['gender'] with what your column name is for gender. 
?> 
<select name="gender" id="gender"> 
    <option value=" "> EMPTY </option> 
    <option value="Male" <?php if($gender == "Male") echo "selected='selected'"; ?>>Male</option> 
    <option value="Female" <?php if($gender == "Female") echo "selected='selected'"; ?>>Female</option> 
</select>