function unameExist(uname){
var back;
var xhr =new XMLHttpRequest();
xhr.onreadystatechange = function(){
console.log(xhr.readyState);
if(xhr.readyState == 4){
if(xhr.status === 200){
var list = JSON.parse(xhr.responseText);
if(list.code == 1){
back = true;
}else{
back = false;
}
}
}
}
xhr.open('post','unameCheck.php',true);
xhr.setRequestHeader("Content-type","application/x-www-form-urlecode");
xhr.send("name="+uname+"");
return back
};
<?php
header("Content-type:text/plain;charset=utf-8");
$name = $_REQUEST['name'];
$conn = mysqli_connect('127.0.0.1','root','','my');
$sql = "SET NAMES UTF8";
mysqli_query($conn,$sql);
$sql = "SELECT uname FROM login WHERE uname='$name'";
$result = mysqli_query($conn,$sql);
$row = mysqli_fetch_ALL($result,MYSQLI_ASSOC);
if($row){
$output['code'] = 1;
$output['msg'] = 'exist';
}else{
$output['code'] = 2;
$output['msg'] = 'no-exist';
}
echo Json_encode($output);
?>
为什么我的uname一直传不到我的PHP里面 是哪里写错了还是什么