【ajax php实现无刷新验证码】ajax+php实现无刷新验证手机号的实例

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一款简单的无刷新验证手机号是否注册：

客户端实现：

 
请输入手机号：




<script>
var usernamereg = /^1(3|4|5|7|8)\d{9}$/;
function show(){	
var name=document.getElementById("name").value;
var xmlHttp=new XMLHttpRequest();
var url="post.php";
xmlHttp.onreadystatechange=function stateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){ 
 	if(!usernamereg.test(name)){
 		document.getElementById("txt").innerHTML="手机号有误";
	}else{
 	document.getElementById("txt").innerHTML=xmlHttp.responseText 
 		} 
 	}
}
xmlHttp.open("POST",url,true);
xmlHttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
xmlHttp.send("name=" + name);
} 
</script>

服务端实现：

word");
if(! $con )
{
 die("连接失败: " . mysqli_error($con));
}
mysqli_select_db($con,"bdm256727651_db");
$username = "select userName FROM Forms where userName = "$_POST[name]" ";
$result = mysqli_query($con,$username );
$rows=mysqli_num_rows($result);
if($rows){
	echo "手机号已注册"	;
	exit;
}else{
	echo "手机号可用";	
}
mysqli_close($con)
?>

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