WeChat authorization and verification

Provides various official and user-released code examples. For code reference, you are welcome to exchange and learn about the auth authorization verification class, which has been modified on the basis of others. For useful reference, refer

/**
* Authorization related interfaces
*
*
*/

Class wechatauth {

// Advanced functions-developer mode-Get
Private $ app_id = 'wxa0c4 *************';
Private $ app_secret = 'e095b6dc **********************';

/**
* Get authorization Link
*
* @ Param string $ redirect_uri jump address
* @ Param mixed $ state parameter
*/
Public function get_authorize_url ($ redirect_uri = '', $ state = '')
{
$ Redirect_uri = urlencode ($ redirect_uri );
Return "https://open.weixin.qq.com/connect/oauth2/authorize? Appid = {$ this-> app_id} & redirect_uri = {$ redirect_uri} & response_type = code & scope = snsapi_userinfo & state = {$ state} # wechat_redirect ";
}

/**
* Get the authorization token
*
* @ Param string $ code the code obtained through get_authorize_url
*/
Public function get_access_token ($ app_id = '', $ app_secret ='', $ code = '')
{
$ Token_url = "https://api.weixin.qq.com/sns/oauth2/access_token? Appid = {$ this-> app_id} & secret = {$ this-> app_secret} & code = {$ code} & grant_type = authorization_code ";
$ Token_data = $ this-> http ($ token_url );

If ($ token_data [0] = 200)
{
Return json_decode ($ token_data [1], TRUE );
}

Return FALSE;
}

/**
* Obtain authorized user information
*
* @ Param string $ access_token
* @ Param string $ open_id
*/
Public function get_user_info ($ access_token = '', $ open_id = '')
{
If ($ access_token & $ open_id)
{
$ Info_url = "https://api.weixin.qq.com/sns/userinfo? Access_token = {$ access_token} & openid = {$ open_id} & lang = zh_CN ";
$ Info_data = $ this-> http ($ info_url );

If ($ info_data [0] = 200)
{
Return json_decode ($ info_data [1], TRUE );
}
}

Return FALSE;
}

/**
* Verify authorization
*
* @ Param string $ access_token
* @ Param string $ open_id
*/
Public function check_access_token ($ access_token = '', $ open_id = '')
{
If ($ access_token & $ open_id)
{
$ Info_url = "https://api.weixin.qq.com/sns/auth? Access_token = {$ access_token} & openid = {$ open_id} & lang = zh_CN ";
$ Info_data = $ this-> http ($ info_url );

If ($ info_data [0] = 200)
{
Return json_decode ($ info_data [1], TRUE );
}
}

Return FALSE;
}


// Curl
Public function http ($ url, $ method, $ postfields = null, $ headers = array (), $ debug = false)
{
$ Ci = curl_init ();
/* Curl settings */
Curl_setopt ($ ci, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1 );
Curl_setopt ($ ci, CURLOPT_CONNECTTIMEOUT, 30 );
Curl_setopt ($ ci, CURLOPT_TIMEOUT, 30 );
Curl_setopt ($ ci, CURLOPT_RETURNTRANSFER, true );

Switch ($ method ){
Case 'post ':
Curl_setopt ($ ci, CURLOPT_POST, true );
If (! Empty ($ postfields )){
Curl_setopt ($ ci, CURLOPT_POSTFIELDS, $ postfields );
$ This-> postdata = $ postfields;
}
Break;
}
Curl_setopt ($ ci, CURLOPT_URL, $ url );
Curl_setopt ($ ci, CURLOPT_HTTPHEADER, $ headers );
Curl_setopt ($ ci, CURLINFO_HEADER_OUT, true );

$ Response = curl_exec ($ ci );
$ Http_code = curl_getinfo ($ ci, CURLINFO_HTTP_CODE );

If ($ debug ){
Echo "===== post data =====\ r \ n ";
Var_dump ($ postfields );

Echo '= info ='. "\ r \ n ";
Print_r (curl_getinfo ($ ci ));

Echo '= $ response ='. "\ r \ n ";
Print_r ($ response );
}
Curl_close ($ ci );
Return array ($ http_code, $ response );
}

}Release the output demo. For more information, see // Authentication Link
Public function wxurl (){
Import ('myclass. Wechatauth ', APP_PATH );
$ Wechat = new wechatauth ();
$ Token = session ('Token'); // check whether authorization is enabled.
If (! Empty ($ token )){
Print_r ($ token );
$ State = $ Wechat-> check_access_token ($ token ['Access _ token'], $ token ['openid']); // check whether the token is available (successful information: "errcode": 0, "errmsg": "OK ")
Print_r ($ state );
}
$ Url = $ Wechat-> get_authorize_url ('HTTP: // twx.vjiankang.org/wsite/test/wxrurl', '1'); // After the url is authorized, it will be processed below
Echo 'authorization ';

}

// Return a string
Public function wxrurl (){
Import ('myclass. Wechatauth ', APP_PATH );
$ Wechat = new wechatauth ();
Print_r ($ _ GET); // information obtained on this page after successful authorization

$ Token = $ Wechat-> get_access_token ('','', $ _ GET ['code']); // after the authorization is confirmed, the token is obtained based on the returned code.
Print_r ($ token );
Session ('Token', $ token); // Save the authorization information

$ User_info = $ Wechat-> get_user_info ($ token ['Access _ token'], $ token ['openid']); // get user information
Print_r ($ user_info );

}It should be noted that the url we use to return must be changed to the same domain name in the public platform-> developer-> auth Authentication

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