如果你現在正使用iphone、android以及Web等多種平臺工作，請看一下這篇文章，它會告訴你如何使用PHP創建RESTful API。Representational state transfer (REST) 是一個用于向不同應用分發數據的軟件系統。Web服務系統會以JSON或者XML方式響應狀態碼。
REST API處理流程
數據庫
數據庫表users包含了user_id, user_fullname, user_email, user_password 和 user_status字段，十分簡單。
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CREATE
TABLE
IF
NOT
EXISTS `users`
|
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|
(
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`user_id`
int
(11)
NOT
NULL
AUTO_INCREMENT,
|
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`user_fullname`
varchar
(25)
NOT
NULL
,
|
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|
`user_email`
varchar
(50)
NOT
NULL
,
|
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|
`user_password`
varchar
(50)
NOT
NULL
,
|
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|
`user_status` tinyint(1)
NOT
NULL
DEFAULT
'0'
,
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PRIMARY
KEY
(`user_id`)
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) ENGINE=InnoDB
DEFAULT
CHARSET=latin1 AUTO_INCREMENT=1 ;
|
Rest API類：api.php
代碼十分簡單，你需要修改數據庫配置信息，如數據庫名、數據庫賬戶以及密碼。
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require_once
(
"Rest.inc.php"
);
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class
API
extends
REST
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|
{
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public
$data
=
""
;
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const
DB_SERVER =
"localhost"
;
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const
DB_USER =
"Database_Username"
;
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const
DB_PASSWORD =
"Database_Password"
;
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const
DB =
"Database_Name"
;
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private
$db
= NULL;
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public
function
__construct()
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{
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parent::__construct();
// Init parent contructor
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$this
->dbConnect();
// Initiate Database connection
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}
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//Database connection
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private
function
dbConnect()
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{
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$this
->db = mysql_connect(self::DB_SERVER,self::DB_USER,self::DB_PASSWORD);
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if
(
$this
->db)
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mysql_select_db(self::DB,
$this
->db);
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}
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//Public method for access api.
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//This method dynmically call the method based on the query string
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public
function
processApi()
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{
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$func
=
strtolower
(trim(
str_replace
(
"/"
,
""
,
$_REQUEST
[
'rquest'
])));
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if
((int)method_exists(
$this
,
$func
) > 0)
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$this
->
$func
();
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else
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$this
->response(
''
,404);
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// If the method not exist with in this class, response would be "Page not found".
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}
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private
function
login()
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{
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..............
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}
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private
function
users()
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{
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..............
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}
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private
function
deleteUser()
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{
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.............
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}
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//Encode array into JSON
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private
function
json(
$data
)
|
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|
{
|
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if
(
is_array
(
$data
)){
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return
json_encode(
$data
);
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}
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}
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}
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// Initiiate Library
|
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$api
=
new
API;
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|
$api
->processApi();
|
提交登陸
通過訪問REST API地址http://localhost/rest/login/ 顯示從users表中查詢出的用戶數據。Restful API 的登錄狀態是根據狀態碼工作的。如果狀態碼為200，則登陸成功；否則狀態碼為204，會顯示失敗信息。更多的狀態碼信息請查看示例文件中的Rest.inc.php。
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private
function
login()
|
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|
{
|
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// Cross validation if the request method is POST else it will return "Not Acceptable" status
|
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|
if
(
$this
->get_request_method() !=
"POST"
)
|
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|
{
|
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$this
->response(
''
,406);
|
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|
}
|
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|
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$email
=
$this
->_request[
'email'
];
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|
$password
=
$this
->_request[
'pwd'
];
|
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|
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|
// Input validations
|
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if
(!
empty
(
$email
)
and
!
empty
(
$password
))
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|
{
|
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|
if
(filter_var(
$email
, FILTER_VALIDATE_EMAIL)){
|
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$sql
= mysql_query(
"SELECT user_id, user_fullname, user_email FROM users WHERE user_email = '$email' AND user_password = '"
.md5(
$password
).
"' LIMIT 1"
,
$this
->db);
|
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if
(mysql_num_rows(
$sql
) > 0){
|
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$result
= mysql_fetch_array(
$sql
,MYSQL_ASSOC);
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|
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|
// If success everythig is good send header as "OK" and user details
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|
$this
->response(
$this
->json(
$result
), 200);
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|
}
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$this
->response(
''
, 204);
// If no records "No Content" status
|
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|
}
|
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|
}
|
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|
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|
// If invalid inputs "Bad Request" status message and reason
|
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|
$error
=
array
(
'status'
=>
"Failed"
,
"msg"
=>
"Invalid Email address or Password"
);
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|
$this
->response(
$this
->json(
$error
), 400);
|
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|
}
|
獲取用戶信息
通過訪問REST API 地址http://localhost/rest/users/ 獲取用戶的信息。
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private
function
users()
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|
{
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// Cross validation if the request method is GET else it will return "Not Acceptable" status
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|
if
(
$this
->get_request_method() !=
"GET"
)
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|
{
|
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$this
->response(
''
,406);
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|
}
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$sql
= mysql_query(
"SELECT user_id, user_fullname, user_email FROM users WHERE user_status = 1"
,
$this
->db);
|
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|
if
(mysql_num_rows(
$sql
) > 0)
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|
{
|
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|
$result
=
array
();
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while
(
$rlt
= mysql_fetch_array(
$sql
,MYSQL_ASSOC))
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|
{
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$result
[] =
$rlt
;
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}
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// If success everythig is good send header as "OK" and return list of users in JSON format
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$this
->response(
$this
->json(
$result
), 200);
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}
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$this
->response(
''
,204);
// If no records "No Content" status
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}
|
刪除用戶信息
根據user_id刪除特定用戶的信息，只需要訪問REST API地址http://localhost/rest/deleteUser/
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private
function
deleteUser()
|
2
|
{
|
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|
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|
if
(
$this
->get_request_method() !=
"DELETE"
){
|
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$this
->response(
''
,406);
|
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}
|
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$id
= (int)
$this
->_request[
'id'
];
|
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if
(
$id
> 0)
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|
{
|
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mysql_query(
"DELETE FROM users WHERE user_id = $id"
);
|
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$success
=
array
(
'status'
=>
"Success"
,
"msg"
=>
"Successfully one record deleted."
);
|
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|
$this
->response(
$this
->json(
$success
),200);
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}
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else
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|
{
|
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|
$this
->response(
''
,204);
// If no records "No Content" status
|
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|
}
|
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|
}
|
Chrome拓展
測試PHP restful API 響應的一個chrome的插件為 Advanced REST client Application
.htaccess code
使用.htaccess使URL更加友好。在demo示例中修改htaccess.txt to .htaccess。
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<
IfModule
mod_rewrite.c>
|
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RewriteEngine On
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RewriteCond %{REQUEST_FILENAME} !-d
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RewriteCond %{REQUEST_FILENAME} !-s
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RewriteRule ^(.*)$ api.php?rquest=$1 [QSA,NC,L]
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RewriteCond %{REQUEST_FILENAME} -d
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RewriteRule ^(.*)$ api.php [QSA,NC,L]
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RewriteCond %{REQUEST_FILENAME} -s
|
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RewriteRule ^(.*)$ api.php [QSA,NC,L]
|
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</
IfModule
>
|
Demo示例下載：
PHP示例源碼：REST API示例(104)原文出自： http://www.9lessons.info/2012/05/create-restful-services-api-in-php.html
本文由PHP愛好者原創翻譯！轉載請注明鏈接！
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