19-login.php

php 和 ajax 开发的一些资料

<?php
include "19-con.php";
$user=$_GET["user"];
$pass=$_GET["pass"];
$sql="select * from $user_t where nick='$user' and pass='$pass'";
$result=mysql_query($sql,$my_conn);
$num=mysql_num_rows($result);
if($num>0)
{
  $sql2="delete from $online_t where nick='$user'";
  mysql_query($sql2,$my_conn);
  $sql3="insert into $online_t (nick) values('$user')";
  $result3=mysql_query($sql3,$my_conn);
  if($result3)
  {
		  echo "true";
  }
}
else
{
  echo "false";
}
mysql_close($my_conn);
?>