Question

JAVA CODE:

import java.io.*;
import java.net.*;

class Server {
   public static void main(String args[]) {
      try {
         ServerSocket srvr = new ServerSocket(51);
         Socket skt = srvr.accept();
         System.out.print("Server has connected!\n");
         PrintWriter out = 
                 new PrintWriter(skt.getOutputStream(), true);
         BufferedReader in = 
                 new BufferedReader(new InputStreamReader(skt.getInputStream()));
         if(in.readLine() == "xFF"){
             out.print("OK");
         }
         in.close();
         out.close();
         skt.close();
         srvr.close();
      }
      catch(Exception e) {
         System.out.print("Whoops! It didn't work!\n");
      }
   }
}

PHP CODE:

<?php
    $con = fsockopen("127.0.0.1", 51, $errno, $errstr, 10);
    fwrite($con, "xFF");
    if(fread($con, 256) == "OK"){
        // Its Works
    }
?>

The PHP Code return: Fatal error: Maximum execution time of 60 seconds exceeded in C:\xampp\htdocs\index.php on line 7

Answer 1

if(in.readLine() == "xFF") => this will block forever since you do not send a newline character in your PHP script. Therefore you never send anything from your Java app and fread will never read anything at all. fwrite($con, "xFF\n"); should do the trick.