java - TCP 服务器 Java 与 PHP

Question

Java 代码:

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 代码:

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

PHP 代码返回: fatal error :第 7 行 C:\xampp\htdocs\index.php 中超过 60 秒的最大执行时间

Answer 1

if(in.readLine() == "xFF") => 这将永远阻塞，因为您没有在 PHP 脚本中发送换行符。因此，您永远不会从您的 Java 应用程序发送任何内容，而 fread 也永远不会读取任何内容。 fwrite($con, "xFF\n"); 应该可以解决问题。