wordpress邀请码的实现

有的客户需要邀请码注册，wp自学笔记这就将实现代码贡献出来，在实现邀请码的功能时有参考过一个插件。

思路：

1. 需要新建一个数据表来保存邀请码。

2. 后台需要两个页面：邀请码列表、添加邀请码。

3. 添加邀请码的时候需要能设置前缀，一次生成多个邀请码，邀请码长度可自定义，每个邀请码使用次数可设置。

数据表

code:邀请码、max:邀请码使用次数、users:使用这个验证码的所有用户、status:验证码是否可用。

数据库操作

数据库操作部分代码包括：1. 建立数据库。2.对数据的获取、增加、删除、更改等操作。

<?php
//第一次启用主题时执行
ashuwp_load_theme() {
$pagenow;
( is_admin() && ‘themes.php’ == $pagenow && isset( $_GET[‘activated’] ) ){
ashuwp_invitation_code_install();
}
}
add_action( ‘load-themes.php’, ‘ashuwp_load_theme’ );
//建立数据表
ashuwp_invitation_code_install(){
$wpdb;
$table_name = $wpdb->prefix . ‘invitation_code’;
( $wpdb->get_var(“SHOW TABLES LIKE ‘$table_name'”) != $table_name ) :
$sql = ” CREATE TABLE `”.$wpdb->prefix.“invitation_code` (
`id` BIGINT NOT NULL AUTO_INCREMENT PRIMARY KEY ,
`code` varchar(40),
`max` INT NOT NULL,
`users` varchar(20),
`status` tinyint
) ENGINE = MYISAM DEFAULT CHARSET=utf8;”;
(ABSPATH . ‘wp-admin/includes/upgrade.php’);
dbDelta($sql);
;
}
//插入数据
ashuwp_insert_invitation_code( $code, $max = 1, $users, $status){
$wpdb;
($code==”){
false;
}
$code = trim($code);
$code_exists = ashuwp_check_invitation_code($code);
(!$code_exists){
$insert = “insert into “.$wpdb->prefix.“invitation_code (code,max,users,status) values( ‘$code’, ‘$max’, ”,’1′)”;
$wpdb->query($insert);
true;
}{
false;
}
}
//检查邀请码是否已存在
ashuwp_check_invitation_code( $code ){
$wpdb;
$sql = “select * from “.$wpdb->prefix.“invitation_code where code=’$code'”;
$result = $wpdb->get_results($sql);
(!($result)){
true;
}{
false;
}
}
//获取邀请码
ashuwp_get_invitation_code($per_page=50, $page=1){
$wpdb;
$page = (int)$page;
$per_page = (int)$per_page;
(!$page){
$page = 1;
}
(!$per_page){
$per_page = 50;
}
$begin = $per_page*($page-1);
$end = $per_page*$page;
$sql = “select * from “.$wpdb->prefix.“invitation_code limit $begin,$end”;
$results = $wpdb->get_results($sql,’ARRAY_A’);
$results;
}
//邀请码的删除、启用、禁用。
ashuwp_operation_invitation_code( $id, $action ){
$wpdb;
$id = (int)$id;
(!$id){
false;
}
(!in_array($action,(‘delete‘,’deactive’,’active’))){
false;
}
($action ==’delete‘){
$sql = “delete from “.$wpdb->prefix .“invitation_code where id=’$id'”;
}
($action ==’deactive’){
$sql = “update “.$wpdb->prefix .“invitation_code set status=0 where id=’$id'”;
}
($action ==’active’){
$sql = “update “.$wpdb->prefix .“invitation_code set status=1 where id=’$id'”;
}
$result = $wpdb->query($sql);
($result){
true;
}{
false;
}
}

网站后台
网站后台部分代码包括：1. 邀请码列表页面。2. 邀请码增加页面。

<?php
ashuwp_invitation_code_admin {
$instance;
__construct(){
add_action( ‘admin_menu’, (&$this, ‘ashuwp_invitation_code_menu’) );
}
ashuwp_invitation_code_menu(){
add_menu_page( ‘邀请码’, ‘邀请码’, ‘manage_options’, ‘invitation_code’, (&$this, ‘invitation_code_list’),”,27);
add_submenu_page(‘invitation_code’, ‘添加邀请码’, ‘添加邀请码’, ‘manage_options’, ‘invitation_code_add’, (&$this, ‘invitation_code_add’));
}
invitation_code_list(){
( isset($_GET[‘code_action’]) && in_array($_GET[‘code_action’],(‘delete‘,’deactive’,’active’)) && isset($_GET[‘code_id’]) ){
$code_id = (int)$_GET[‘code_id’];
(!$code_id){
;
}
$result = ashuwp_operation_invitation_code( $code_id, $_GET[‘code_action’] );
}
$code_lists = ashuwp_get_invitation_code(999,1);
?>
<div =“wrap”>
<h1 =“wp-heading-inline”>邀请码</h1>
<a href=“<?php echo admin_url( ‘admin.php?page=invitation_code_add’ ); ?>” =“page-title-action”>添加</a>
<hr =“wp-header-end”>
<?php
(isset($result)){
($result){
?>
<div id=“message” =“notice notice-success”>操作成功。</div>
<?php
}{
?>
<div id=“message” =“notice notice-error”>操作失败。</div>
<?php
}
}
?>
<ul =“subsubsub”><li =“all”>全部<span =“count”>（<?php echo count($code_lists); ?>）</span></ul>
<table =“wp-list-table widefat fixed”>
<thead>
<tr>
<th scope=“col”>ID</th>
<th scope=“col”>邀请码</th>
<th scope=“col”>统计(最大使用数/已使用)</th>
<th scope=“col”>用户</th>
<th scope=“col”>操作</th>
</tr>
</thead>
<tbody>
<?php
($code_lists){
($code_lists $code){
$users = ();
(!($code[‘users’])){
$users = explode( ‘,’, $code[‘users’] );
}
$used = count($users);
?>
<tr>
<td><?php echo $code[‘id’]; ?></td>
<td>
<?php echo $code[‘code’]; ?>
<?php
(($code[‘status’]) || !$code[‘status’]){
echo ‘-已禁用’;
}
?>
</td>
<td>
<?php echo $code[‘max’].’/’.$used; ?>
</td>
<td>
<?php
( $users $user_id ){
$user = get_user_by(‘id’, $user_id);
(!($user)){
?>
<a href=“<?php echo admin_url( ‘user-edit.php?user_id=’.$user->ID ); ?>”><?php echo $user->user_login; ?></a>,
<?php
}
}
?>
</td>
<td>
<a href=“<?php echo admin_url( ‘admin.php?page=invitation_code&code_action=delete&code_id=’.$code[‘id’] ); ?>”>删除</a>
<?php
(($code[‘status’]) || !$code[‘status’]){
?>
<a href=“<?php echo admin_url( ‘admin.php?page=invitation_code&code_action=active&code_id=’.$code[‘id’] ); ?>”>启用</a>
<?php
}{
?>
<a href=“<?php echo admin_url( ‘admin.php?page=invitation_code&code_action=deactive&code_id=’.$code[‘id’] ); ?>”>禁用</a>
<?php
}
?>
</td>
</tr>
<?php
}
}
?>
</tbody>
<tfoot>
<tr>
<th scope=“col”>ID</th>
<th scope=“col”>邀请码</th>
<th scope=“col”>统计</th>
<th scope=“col”>用户</th>
<th scope=“col”>操作</th>
</tr>
</tfoot>
</table>
<div =“tablenav bottom”>
<div =“tablenav-pages”>
<span =“pagination-links”>
</span>
</div>
</div>
</div>
<?php
}
invitation_code_add(){
$data_codes = ashuwp_get_invitation_code(999,1);
$code_list = ();
($data_codes $code){
$code_list[] = $code[‘code’];
}
(isset($_REQUEST[‘submit’]) && isset($_REQUEST[‘ashuwp_invitation_code_field’]) && check_admin_referer(‘ashuwp_invitation_code_action’, ‘ashuwp_invitation_code_field’) ) {
$code_prefix = ”;
(!($_POST[‘code_prefix’])){
$code_prefix = trim($_POST[‘code_prefix’]);
}
$code_length = ”;
(!($_POST[‘code_length’])){
$code_length = (int)$_POST[‘code_length’];
}
(!$code_length){
$code_length = 8;
}
$code_number = 1;
(!($_POST[‘code_number’])){
$code_number = (int)$_POST[‘code_number’];
}
(!$code_number){
$code_number = 1;
}
$code_counter = ”;
(!($_POST[‘code_counter’])){
$code_counter = (int)$_POST[‘code_counter’];
}
(!$code_counter){
$code_counter = 1;
}
$i=1;
$code_tem = ();
( $i <= $code_number ){
$tem = strtoupper( $code_prefix . wp_generate_password( $code_length, false ) );
(!in_array($tem,$code_list)){
$i++;
$code_tem[] = $tem;
ashuwp_insert_invitation_code( $tem, $code_counter, ”, 1);
}
}
}
?>
<div =“wrap”>
<h1 =“wp-heading-inline”>添加邀请码</h1>
<a href=“<?php echo admin_url( ‘admin.php?page=invitation_code_add’ ); ?>” =“page-title-action”>添加</a>
<hr =“wp-header-end”>
<?php
(!($code_tem)){
?>
<div id=“message” =“notice notice-success”>
<p>邀请码添加成功：</p>
<?php
($code_tem $text){
echo ‘<p>’.$text.'</p>’;
}
?>
</div>
<?php
}
?>
<form action=“” method=“post”>
<table =“form-table”>
<tbody>
<tr>
<td><label =“code_prefix”>邀请码前缀</label></td>
<td>
<input type=“text” id=“code_prefix” name=“code_prefix” =“regular-text” value=“”/>
<p =“description”>前缀可不填。</p>
</td>
</tr>
<tr>
<td><label =“code_length”>邀请码字符长度</label></td>
<td>
<input type=“text” id=“code_length” name=“code_length” =“regular-text” value=“”/>
<p =“description”>字符长度不包括前缀，默认8个字符。</p>
</td>
</tr>
<tr>
<td><label =“code_number”>邀请码个数</label></td>
<td>
<input type=“text” id=“code_number” name=“code_number” =“regular-text” value=“”/>
<p =“description”>本次生成多少个邀请码，默认1个。</p>
</td>
</tr>
<tr>
<td><label =“code_counter”>允许使用的次数</label></td>
<td>
<input type=“text” id=“code_counter” name=“code_counter” =“regular-text” value=“”/>
<p =“description”>每个邀请码允许使用的次数，默认1次。</p>
</td>
</tr>
</tbody>
</table>
<p =“submit”>
<?php wp_nonce_field( ‘ashuwp_invitation_code_action’,’ashuwp_invitation_code_field’ ); ?>
<input type=“submit” name=“submit” id=“submit” =“button button-primary” value=“生成邀请码”>
</p>
</form>
</div>
<?php
}
}
$invitation_code = ashuwp_invitation_code_admin();