EMS express Waybill No Lenovo

Provides a variety of official and user-released code examples. For code reference, you are welcome to exchange and learn to give a ticket number, think of the next n ticket numbers
PHP version:

  
Print_r (EMS ('ek702111856cs ', 10 ));
    
Function EMS ($ code, $ num ){
If (! Preg_match ('/[a-z-A-Z] {2} [0-9] {9} [a-z-A-Z] {2}/', $ code )) die ('start value verification failed! Invalid EMS waybill number! ');
$ Start = (float) substr ($ code, 2, 8 );
For ($ I = 0; $ I <$ num; $ I ++ ){
$ A = (string) ($ start + $ I );
$ B = (11-($ a [0] * 8 + $ a [1] * 6 + $ a [2] * 4 + $ a [3] * 2 + $ a [4] * 3 + $ a [5] * 5 + $ a [6] * 9 + $ a [7] * 7) % 11 ));
$ B = $ B <10? $ B :( ($ B-10) * 5 );
$ Arr [] = $ code [0]. $ code [1]. $ a. $ B. $ code [11]. $ code [12];
}
Return $ arr;
}

?>JavaScript version: