php 登录注册api接口代码

/**
*一览（www.yl1001.com）
* PHP开发API接口 服务端
*/
require 'conn.php';    //连接数据库的文件
header('Content-Type:text/html;charset=utf-8'); 

$action = $_GET['action'];
switch ($action) { 

    //注册会员
    case"adduserinfo";
        $username = lib_replace_end_tag(trim($_GET['username']));    //lib_replace_end_tag() 防止sql注入
        $password2 = lib_replace_end_tag(trim($_GET['userpassword']));
        $password = md5("$password2" . ALL_PS);
        $email = lib_replace_end_tag(trim($_GET['email'])); 

        if ($username == '' || $password2 == '' || $password == '') {
            $res = urlencode("参数有误");
            exit(json_encode($res)); //有空信息
        } 

        $sql = "select username from `member` where username='$username'";
        $query = mysql-query.html target=_blank class=infotextkey>mysql_query()($sql, $conn);
        $count = mysql_num_rows($query); 

        if ($count > 0) {
            exit(json_encode(1)); //返回1表示注册失败
        } else { 

            $addsql = "insert into `member` (username,password,email) values ('$username','$password','$email')";
            mysql_query($addsql);
            exit(json_encode(0)); //返回0表示注册成功
        }
        break; 

    //查询用户信息
    case"selectuserinfo";
        $username = lib_replace_end_tag($_GET['username']);
        $sql = "select id,username,nickname,mobile from `member` where username='$username'";
        $query = mysql_query($sql, $conn);
        $row = mysql_fetch_array($query);
        foreach ($row as $key => $v) {
            $res[$key] = urlencode($v);
        }
        exit(json_encode($res));
        break;
    //会员登录
    case"userlogin";
        $username = lib_replace_end_tag($_GET['username']);
        $password2 = lib_replace_end_tag(trim($_GET['userpassword']));
        $password = md5("$password2" . ALL_PS);
        $sqluser = "select id,username,password from `member` where username='" . $username . "' and password='" . $password . "'";
        $queryuser = mysql_query($sqluser);
        $rowuser = mysql_fetch_array($queryuser);
        if ($rowuser && is_array($rowuser) && !empty($rowuser)) {
            if ($rowuser['username'] == $username && $rowuser['password'] == $password) {
                if ($rowuser['password'] == $password) {
                    $res = urlencode("登录成功");
                    exit(json_encode($res));
                } else {
                    $res = urlencode("密码错误");
                    exit(json_encode($res));
                }
            } else {
                $res = urlencode("用户名不存在");
                exit(json_encode($res));
            }
        } else {
            $res = urlencode("用户名密码错误");
            exit(json_encode($res));
        }
        /*
         * 0：表示登录成功，1：表示密码错误，2：用户名不存在，3：用户名密码错误
         */
        break; 

    default:
        exit(json_encode(error));
  }
}

 PHP开发API接口的实例代码 分享一例php实现API接口的代码，实现用户的注册、登录、查询用户信息的功能，
是学习PHP API开发的不错实例，有兴趣的朋友研究下吧。 
PHP API接口的服务端部分 
代码示例： <?php PHP API 客户端部分 代码示例：

 <?php
/**
* PHP API接口 客户端
* edit: www.jbxue.com
*/
header('Content-Type:text/html;charset=utf-8'); //避免输出乱码 
 
function httpPost($url, $parms) { 
    $url = $url . $parms; 
    if (($ch = curl_init($url)) == false) { 
        throw new Exception(sprintf()("curl_init error for url %s.", $url)); 
    } 
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
    curl_setopt($ch, CURLOPT_HEADER, 0); 
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 600); 
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); 
    if (is_array($parms)) { 
        curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: multipart/form-data;')); 
    } 
    $postResult = @curl_exec($ch); 
    $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE); 
    if ($postResult === false || $http_code != 200 || curl_errno($ch)) { 
        $error = curl_error($ch); 
        curl_close($ch); 
        throw new Exception("HTTP POST FAILED:$error"); 
    } else { 
        // $postResult=str_replace()("\xEF\xBB\xBF", '', $postResult); 
        switch (curl_getinfo($ch, CURLINFO_CONTENT_TYPE)) { 
            case 'application/json': 
                $postResult = json_decode()($postResult); 
                break; 
        } 
        curl_close($ch); 
        return $postResult; 
    } 
} 
$postUrl = "http://pujia.test.com/api/server.php"; 
 
$p=$_GET['p']; 
if ($p =="selectuserinfo") { 
 
    $username = $_GET['username']; 
    $parms = "?action=selectuserinfo&username=" . $username . ""; 
 
} elseif ($p =="adduserinfo") { 
 
    $username = $_GET['username']; 
    $userpassword = $_GET['userpassword']; 
    $parms = "?action=adduserinfo&username=" . $username . "&userpassword=" . $userpassword . ""; 
 
} elseif ($p =="userlogin") { 
    $username = $_GET['username']; 
    $userpassword = $_GET['userpassword']; 
    $parms = "?action=userlogin&username=" . $username . "&userpassword=" . $userpassword . ""; 
 
} 
$res = httpPost($postUrl, $parms); //$parms 
$res = json_decode($res); 
print_r(urldecode(json_encode($res))); 
}

转载自：http://www.cnblogs.com/mssql8/p/4034842.html