请大家帮帮忙,ajax 验证表单 php页面提示错误,1>第一条错误语句过滤参数时,不知错在什么地方?2>第5、7条连接数据库时错误,不知错在什么地方?请大家帮帮忙详细说一下,谢谢。<?php$name =isset($_GET['name'])? $_GET['name']="";
$conn=mysql_connect("localhost","root","123");
mysql_select_db("db_signup",$conn);
$name = $_GET["name"];
$sql = mysql_query("SELECT username FROM `db_signup`.`tb_signup` WHERE username="$_GET["name"]"");
if($name!=""){
if($name=="admin"){
echo 0;
}else{
echo 1;
}
}else{
echo 0;
}
?>
$conn=mysql_connect("localhost","root","123");
mysql_select_db("db_signup",$conn);
$name = $_GET["name"];
$sql = mysql_query("SELECT username FROM `db_signup`.`tb_signup` WHERE username="$_GET["name"]"");
if($name!=""){
if($name=="admin"){
echo 0;
}else{
echo 1;
}
}else{
echo 0;
}
?>
$sql = mysql_query("SELECT username FROM `db_signup`.`tb_signup` WHERE username='$_GET[name]'");
$name =isset($_GET['name'])? $_GET['name']:"";
$sql = mysql_query("SELECT username FROM `db_signup`.`tb_signup` WHERE username='.$_GET["name"].'");
echo 0;
}else{
echo 1;
}
}else{
echo 2;
} js页面判断----提示错误,缺少对象if(http_request.status==200){
.....
}}else();
字符:5
错误:未指定的错误
代码:019 if(http_request.status==200){
..........
33 }else{};