Multi webRequest arduino

Goodmorning, I would ask gently how I can send to my ethernet shield multi request in one step. I mean with my personal domotic system I would like to send something like that:

"?question_100_xxxx" from android app where xxxx is a number and I would like that arduino if read ?question_100, read also the following number xxxx.

Can someone help me to find a possible solution?

I copy here just the part of the code of more interesting:

    while (client.connected()) {
              if (client.available()) {
                char c = client.read();
                linebuf[charcount] = c;
                if (charcount < sizeof(linebuf) - 1) charcount++;

               
                if (c == '\n' && currentLineIsBlank) {
                  if (postText.indexOf("?question_100") > 0)


                       //ADD HOW READ THE NUMBER XXXX IN A VARIABLE


                 }
                 }
                 }
                 }

thank you really much
Best regards
Denis