Private API: Upgrade check version Comparison

Private API, which allows the app to check the new version.

It's better to compare only numbers. How can we compare 1.0.1 and 1.0.2?

Business logic: when the user version is earlier than the latest version, an upgrade is prompted.

Both types are supported,CodeAs follows:

<? PHP  /*  ** Check the latest version.  */  Function Issecondbigger ( $ First , $ Second  ){  //  Pure numeric comparison      If ( Is_numeric ($ First )&& Is_numeric ( $ Second  )){  If ( $ Second > $ First  ){  Return   True  ;}  Else  {  Return   False ;}}  //  Comparison of x. x      If ( Stripos ( $ Second ,'.')! = False  ){  $ F = Explode ('.', $ First  );  $ S = Explode ('.',$ Second  );  $ Count = Count ( $ F  );  Foreach ( $ F   As   $ K => $ V  ){  //  For example, 1.0 to 2.0              If ( $ S [ $ K ]> $ V  ){  Return   True  ;}  //  It does not matter if the first digit is equal. The last digit must be greater than // For example, 1.0.5 to 1.0.8.              If (( $ Count = $ K + 1 )&&( $ S [ $ K ]> $ V )){  Return   True  ;}}}  Return   False  ;}  $ V = '1. 0.5 '; //  User version  $ Latest = '1. 0.8 '; //  Latest Version  $ Is_need_update = False ;  If (Issecondbigger ( $ V , $ Latest  )){  $ Is_need_update = True  ;}  Var_dump ( $ Is_need_update  ); ?>

 

API: http://api.example.com/latest? App_id = 1 & V = 1.0.2 & WLT = ZH-Hans

Input:

App_id: the private API allocates IDs for multiple apps of the company, such as andriod, iPhone, iPad, and PC.

V: Version Number installed by the user

WLT: Text code, such as en_us, ZH-HANT, zh_cn for iOS, zh_cn for Android, zh_cn, ZH, and zh_tw, which are mapped by the backend, directly connect the app to the system value.

References:

Http://developer.android.com/reference/java/util/Locale.html