How to GET a READ from php into a variable (allways 1 or 0)

Projects Interfacing w/ Software on the Computer
3 
#include <SoftwareSerial.h>
//#include <TinyGPS.h>

float lat,lon;

SoftwareSerial gprsSerial(7, 8);
//SoftwareSerial gpsSerial(4, 3);

const int buzz = 13;
//TinyGPS gps; // create gps object

void setup()
{
 pinMode(buzz, OUTPUT);
 gprsSerial.begin(19200);
 Serial.begin(19200);

 Serial.println("Config SIM900...");
 delay(2000);
 Serial.println("Done!...");
 gprsSerial.flush();
 Serial.flush();

 gprsSerial.println("AT+CPIN=\"\"");
 delay(25000);
 toSerial();

 // attach or detach from GPRS service 
 gprsSerial.println("AT+CGATT?");
 delay(2000);
 toSerial();


 // bearer settings
 gprsSerial.println("AT+SAPBR=3,1,\"CONTYPE\",\"GPRS\"");
 delay(2000);
 toSerial();

 // bearer settings
 gprsSerial.println("AT+SAPBR=3,1,\"APN\",\"youinternet\"");
 delay(2000);
 toSerial();

 // bearer settings
 gprsSerial.println("AT+SAPBR=3,1,\"USER\",\"\"");
 delay(2000);
 toSerial();

 // bearer settings
 gprsSerial.println("AT+SAPBR=3,1,\"PWD\",\"\"");
 delay(2000);
 toSerial();

 // bearer settings
 gprsSerial.println("AT+SAPBR=1,1");
 delay(2000);
 toSerial();
}


void loop()
{
 lat=41.4376106;
 lon=2.2249775;
  //Check GPRS/GSM available
  //while(gpsSerial.available()){
   //CSi GPS tiene datos
   //if(gps.encode(gpsSerial.read())){
     //Recibir datos GPS y establecerlos en variables lat y lon
     //gps.get_position(&lat,&lon);
     //Print de los datos (Debug)
     //TODO eliminar el debug
     //Serial.print("Position: ");
     //Serial.print("lat: ");Serial.print(lat);Serial.print(" ");// print latitude
     //Serial.print("lon: ");Serial.println(lon); // print longitude
   //}
  //}


  // initialize http service
  gprsSerial.println("AT+HTTPINIT");
  delay(3000); 
  toSerial();

  // set http param value
  gprsSerial.println("AT+HTTPPARA=\"URL\",\"http://foro.battlepvpmine.es/write_data.php?longitude=" + String(lon, 7) + "&latitude=" + String(lat, 7) + "&key=8A621E21A96A6E36\""); 
  delay(3000);
  toSerial();

  // set http action type 0 = GET, 1 = POST, 2 = HEAD
  gprsSerial.println("AT+HTTPACTION=1");
  delay(6000);
  toSerial();


  gprsSerial.println("");
  gprsSerial.println("AT+HTTPTERM");
  toSerial();
  delay(3000);

  gprsSerial.println("");
  delay(10000);

  ///////////////////////////////////////////////

  gprsSerial.println("AT+HTTPINIT"); //init the HTTP request
  delay(3000); 
  toSerial();

  gprsSerial.println("AT+HTTPPARA=\"URL\",\"http://foro.battlepvpmine.es/get_buzzing.php?key=8A621E21A96A6E36\"");// setting the httppara, 
  //the second parameter is the website from where you want to access data 
  delay(3000);
  toSerial();

  gprsSerial.println();
  gprsSerial.println("AT+HTTPACTION=0");//submit the GET request 
  delay(8000);//the delay is important if the return datas are very large, the time required longer.
  toSerial();



  gprsSerial.println("AT+HTTPREAD=0,20");
  delay(6000);
  toSound();
  /*if(Serial.read().equals("1"))
  {
   digitalWrite(buzz, HIGH);
   Serial.println("Funciona");
  }
  else
  {
   digitalWrite(buzz,LOW);
   Serial.println("No Funciona");
  }
  */
  
  gprsSerial.println("");
  delay(3000);
  gprsSerial.println("AT+HTTPTERM");// terminate HTTP service
  toSerial();
  
}

void toSound(){
 while (gprsSerial.available() != 0 ) {
   int a = Serial.write(gprsSerial.println("AT+HTTPREAD=0,20"));
   Serial.println("Esto es lo que obtiene: ");
   Serial.println(a);
   
 }
}


void toSerial()
{
 while(gprsSerial.available()!=0)
 {
   Serial.write(gprsSerial.read());
 }
}