PHP jquery ajax实现即时聊天功能

作者：袖梨 2022-06-24
 代码如下 复制代码
index.html




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data.php
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
header("Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT");
header("Cache-Control: no-cache, must-revalidate");
header("Pramga: no-cache");
set_time_limit(0);
$get = $_GET['action'];
$type = $_GET['type'];
$file = $type.'.txt';
if(isset($get) && isset($type) && file_exists($file)){
 switch($get){
  case 'first':
   $chat = file_get_contents($file);
   $json=array(
    'status' => 200,
    'time' => gmdate("s"),
    'chat' => $chat,
   );
   echo json_encode($json);
   break; www.111com.net
  case 'while':
   $oldsize = filesize($file);
   $newsize = filesize($file);
   while(true){
    if($oldsize!=$newsize){
     $chat = file_get_contents($file);
     $json=array(
      'status' => 200,
      'time' => gmdate("s"),
      'chat' => $chat,
     );
     echo json_encode($json);
     exit;
    }
    clearstatcache();
    $newsize = filesize($file);
    usleep(10000);
   }
   break;
 }
}
?>
send.php
$json = array();
$txt = isset($_GET['txt'])?$_GET['txt']:'';
$type = isset($_GET['type'])?$_GET['type']:'';
if($txt!=''){
 $file = $type.".txt";
 if(file_exists($file)){
  $fp = fopen($file,"a");
  $str = "rn".'Admin：'.$txt;
  //$str = $txt."n"//linux;
  fwrite($fp, $str);
  fclose($fp);
  $json['status']=200;
  echo json_encode($json);
  exit;
 }
}
?>

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