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php向mysql写入数据失败

2022-08-06 05:11:00 【CSDN问答】

php向mysql写入数据失败，弄了好久都弄不出来。看看问题在哪
html：代码

html><html>    <head>        <meta charset="UTF-8">        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/out/water.min.css"/>        <title> 
    title>     
    head>    <body>        <form action="formData.php" method="get">    <label>姓名: 
    label><input type="text" name="user"/><br>    <label>密码: 
    label><input type="password" name="pass"><br>    <input type="submit" value="注册"/> 
    form>     
    body>     
    html>

php：代码：

$user=$_GET['user'];$pass=$_GET['pass'];$db_host="localhost";$db_name="root";$db_pwd="";$link=mysqli_connect($db_host,$db_name,$db_pwd) ;//2.判断是否成功if ($link){echo"success";}else {echo"fail";}//3.设置字符集mysqli_set_charset($link,"utf8");//4.选择数据库mysqli_select_db($link,"lhy");$sql = "use lhy;";$sql += "INSERT into ifm(name,password) values ('$user','$pass');";if ($link->query($sql) === TRUE) {echo"新记录插入成功";} else {echo " Error:".$sql."
".$link->error;}