提问人:fam 提问时间:11/13/2023 最后编辑:James Zfam 更新时间:11/13/2023 访问量:31
清除按钮不清除文本框字段 php
Clear button not clearing textbox field php
问:
我正在创建一个简单的网站,因为我还在学习。我们有一个活动,包括用户注册、查看注册用户的记录、编辑/更新记录。在更新中,一旦用户单击“编辑”,就会显示一个更新窗体,其文本框中填充了用户要编辑的行的值。我的问题是当用户单击清除按钮时,它不起作用,我需要使用 php 进行清除。
<?php
/* Attempt MySQL server connection. Assuming you are running MySQL
server with default setting (user 'root' with no password) */
$link = mysqli_connect("localhost", "root", "", "ortegadb");
// Check connection
if($link === false){
die("ERROR: Could not connect. " . mysqli_connect_error());
}
// Attempt select query execution
$id = $_REQUEST["userid"];
$sql = "SELECT * FROM usertb WHERE id=$id";
if($result = mysqli_query($link, $sql)){
$row = mysqli_fetch_array($result);
$username = $row["username"];
$password= $row["password"];
$fullname = $row["fullname"];
} else{
echo "ERROR: Could not able to execute $sql. " . mysqli_error($link);
}
// Close connection
mysqli_close($link);
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Update</title>
<style>
body {
font-family: 'Arial', sans-serif;
background-color: #f4f4f4;
margin: 0;
padding: 0;
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
}
form {
background-color: #fff;
padding: 20px;
border-radius: 8px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
max-width: 400px;
width: 100%;
}
input {
width: 100%;
padding: 10px;
margin: 8px 0;
box-sizing: border-box;
border: 1px solid #ccc;
border-radius: 4px;
}
input[type="submit"], input[type="reset"] {
background-color: #4caf50;
color: white;
padding: 10px 15px;
border: none;
border-radius: 4px;
cursor: pointer;
}
input[type="submit"]:hover, input[type="reset"]:hover {
background-color: #45a049;
}
</style>
</head>
<body>
<?php
// Your PHP code here...
?>
<form action="updaterecord.php" method="POST">
<h2><center>Update</center></h2> <br>
Userid:
<input type="text" name="id" value="<?php echo $id ?> "><br>
Username
<input type="text" name="uname" value="<?php echo $username ?> "><br>
Full Name:
<input type="text" name="fullname" value="<?php echo $fullname ?> "><br>
Password:
<input type="text" name="pass" value="<?php echo $password ?> "><br>
<input type="submit" name="sbt" value="Update">
<input type="reset" value="Clear">
</form>
</body>
</html>
我尝试使用javascript,但我们不允许使用它,此外它仍然无法正常工作。我还尝试只制作值“”,但仍然不起作用。
答:
0赞
Pippo
11/13/2023
#1
你可以用javascript来做
首先用一个简单的按钮更改重置按钮:
<input id="clear-button" type="button" value="Clear" >
然后在单击时添加侦听器:
<script>
document.addEventListener("DOMContentLoaded", () => {
document.getElementById("clear-button").addEventListener("click", (e) => {
e.target.form.querySelectorAll("input:not([type=button]):not([type=submit])").forEach( (el) => {
el.value = '';
})
});
});
</script>
评论
<input type="reset">
type="reset"
$_REQUEST["userid"]