Example analysis of ajax and php to achieve non-refresh verification of mobile phone number-PHP Tutorial-php.cn

Example analysis of ajax and php to achieve non-refresh verification of mobile phone number

小云云

Release： 2023-03-18 09:34:02

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This article mainly shares with you an example of ajax+php implementing non-refresh verification of mobile phone numbers. It has a good reference value and I hope it will be helpful to everyone. Let’s follow the editor to take a look, I hope it can help everyone.

A simple non-refresh verification method to verify whether a mobile phone number is registered:

Client implementation:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<style>
#btn{width:80px;height:30px;}
</style>
</head>
<body>
<form> 
请输入手机号：
<input type="text" id="name" name="name">
<input type="button" onclick="show()" id="btn" value="验证">
</form>
<p id="txt"></p>
<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>
</body>
</html>

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Server implementation:

<?php
$con = mysqli_connect(&#39;localhost&#39;, &#39;username&#39;, &#39;password&#39;);
if(! $con )
{
 die(&#39;连接失败: &#39; . mysqli_error($con));
}
mysqli_select_db($con,&#39;bdm256727651_db&#39;);
$username = "select userName FROM Forms where userName = &#39;$_POST[name]&#39; ";
$result = mysqli_query($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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