Parser for Arduino and Ethernet shield W5100 for parse variable from .txt file

Arduino-Ethernet-W5100-parser.ino

//https://arduino.php5.sk
//Autor: Martin Chlebovec (martinius96)
#include <SPI.h>
#include <Ethernet.h>
int led = 6;
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; //MAC
char serverName[] = "www.arduino.php5.sk"; // webserver
IPAddress ip(192, 168, 2, 40);
EthernetClient client;
String readString;
int x=0; //number of rows
char lf=10; //line feed character
void setup(){
pinMode(led, OUTPUT);
 if (Ethernet.begin(mac) == 0) {
    Serial.println("Failed to configure Ethernet using DHCP");
    Ethernet.begin(mac, ip);
  }
  Serial.begin(9600); 
}

void loop(){
if (client.connect(serverName, 80)) {  //starts client connection, checks for connection
    Serial.println("connected");
    client.println("GET /PHP_cz/preklady.txt HTTP/1.1"); //download text
    client.println("Host: www.arduino.php5.sk");
    client.println("Connection: close");  //close 1.1 persistent connection  
    client.println(); //end of get request
  } 
  else {
    Serial.println("Connection unsucessful");
    Serial.println();
  }

  while(client.connected() && !client.available()) delay(1); //wait for datas
  while (client.connected() || client.available()) {
    char c = client.read(); //read buffer
    Serial.print(c); //full http header
    if (c==lf) x=(x+1); //++ for our variable row 
    else if (x==12) readString += c; //our variable (12 can be changed to number of row in your server response, each server give you another amounth of rows in response)

   } 
Serial.print("Variable: ");
  Serial.print(readString);
  readString = (""); //delete string
  x=0; //set 0 for number of rows
  client.stop(); //end connection
  delay(5000); //wait 5 seconds
}