驗證單選按鈕
[英]Validation for Radio Button
問題描述
我試圖為新用戶制作注冊表。 如果在字段中輸入所有值，該表格效果很好。但是當我直接提交表格時，我收到單選按鈕的mysql錯誤。我還使用了一項功能來檢查用戶名是否已經存在或不存在並與密碼匹配。將任何字段留空並按提交，然后頁面變空白，用戶需要從開始填寫所有詳細信息，並且已經存在用戶名警報。我希望僅當用戶名與數據庫相同時才顯示此警報。 請幫忙！
<?php session_start();
// define variables and set to empty values
$fname=$gender=$dept=$email=$uname=$pswd=$cpswd=$role="";
$fnameErr=$genderErr=$deptErr=$emailErr=$unameErr=$pswdErr=$cpswdErr=$roleErr="";
if ($_SERVER["REQUEST_METHOD"] == "POST")
{
if (empty($_POST["fname"]))
{
$fnameErr = "Name is required";
}
else
{
$fname = test_input($_POST["fname"]);
// check if name only contains letters and whitespace
if (!preg_match("/^[a-zA-Z ]*$/",$fname))
{
$fnameErr = "Only letters and white space allowed";
}
}
if (empty($_POST["gender"]))
{
$genderErr = "Gender is required";
}
else
{
$gender = test_input($_POST["gender"]);
}
if (empty($_POST["dept"]))
{
$deptErr = "Department is required";
}
else
{
$dept = test_input($_POST["dept"]);
}
if (empty($_POST["email"]))
{
$emailErr = "Email is required";
}
else
{
$email = test_input($_POST["email"]);
// check if e-mail address is well-formed
if (!filter_var($email, FILTER_VALIDATE_EMAIL))
{
$emailErr = "Invalid email format";
}
}
if (empty($_POST["uname"]))
{
$unameErr = "Username is required";
}
else
{
$uname = test_input($_POST["uname"]);
}
if (empty($_POST["pswd"]))
{
$pswdErr = "Password is required";
}
else
{
$pswd = test_input($_POST["pswd"]);
}
if (empty($_POST["cpswd"]))
{
$cpswdErr = "Password is required";
}
else
{
$cpswd = test_input($_POST["cpswd"]);
}
if (empty($_POST["role"]))
{
$roleErr = "Role is required";
}
else
{
$role = test_input($_POST["role"]);
}
if (!empty($_POST))
{
$host="localhost"; // Host name
$username="root"; // Mysql username
$password=""; // Mysql password
$db_name="testmra"; // Database name
// Connect to server and select databse.
$conn=mysqli_connect($host,$username,$password) or die("cannot connect");
mysqli_select_db($conn,$db_name);
$name = mysqli_real_escape_string($conn, $_POST['fname']);
$gender =mysqli_real_escape_string($conn,$_POST['gender']);
$department = mysqli_real_escape_string($conn, $_POST['dept']);
$email = mysqli_real_escape_string($conn, $_POST['email']);
$username = mysqli_real_escape_string($conn, $_POST['uname']);
$userpass = mysqli_real_escape_string($conn, $_POST['pswd']);
$cpass = mysqli_real_escape_string($conn, $_POST['cpswd']);
$role= mysqli_real_escape_string($conn, $_POST['role']);
$res=mysqli_query($conn,"SELECT username FROM newuser WHERE username='$username'");
$row=mysqli_fetch_row($res);
if($row>0)
{
echo '<script language="javascript">';
echo 'alert("Username '.$username.' already been selected")';
echo '</script>';
}
elseif($userpass!=$cpass)
{
$cpswdErr="Password doesn't match";
}
else
{
$sql="INSERT INTO newuser (name,gender,department,emailid,username,userpass,role)VALUES('$name','$gender','$department','$email','$username','$userpass','$role')";
if (mysqli_query($conn,$sql))
{
header("location:trialregister.php");
exit();
}
else
{
die('Error: Cannot connect to db' );
}
}
}
}
else { }
function test_input($data)
{
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
<html>
<head><title>MRA</title></head>
<body>
<form method="POST" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
<table align="center" cellspacing="5" cellpadding="5">
<tr><td align="right">Full Name :</td><td><input type="text" name="fname"></td><td align="left"><font color="red"><?php echo $fnameErr; ?></td></tr>
<tr><td align="right">Gender :</td><td><input type="radio" name="gender" value="Male">Male<input type="radio" name="gender" value="Female">Female</td><td align="left"><font color="red"><?php echo $genderErr; ?></td></tr>
<tr><td align="right">Department :</td><td><select name="dept">
<option value="">Select Department</option>
<option value="IT">IT</option>
<option value="HR">HR</option>
<option value="Accounts">Accounts</option>
<option value="Sales">Sales</option>
</select></td><td align="left"><font color="red"><?php echo $deptErr; ?></td></tr>
<tr><td align="right">EmailId :</td><td><input type="text" name="email"></td><td align="left"><font color="red"><?php echo $emailErr; ?></td></tr>
<tr><td align="right">Username :</td><td><input type="text" name="uname"></td><td align="left"><font color="red"><?php echo $unameErr; ?></td></tr>
<tr><td align="right">Password :</td><td><input type="password" name="pswd"></td><td align="left"><font color="red"><?php echo $pswdErr; ?></td></tr>
<tr><td align="right">Confirm Password :</td><td><input type="password" name="cpswd"></td><td align="left"><font color="red"><?php echo $cpswdErr; ?></td></tr>
<tr><td align="right">Role :</td><td><input type="radio" name="role" value="User">User<input type="radio" name="role" value="Admin">Admin</td><td align="left"><font color="red"><?php echo $roleErr; ?></td></tr>
<tr><td colspan="3" align="center"><input type="submit" name="submit" value="Submit"> <input type="reset" name="reset" value="Reset"> <input type="button" name="cancel" value="Cancel"></td></tr>
</table>
</form>
</body>
</html>
1 個解決方案
解決方案1
2 已采納 2015-05-26 04:48:41
嘗試這個...
我已經將if條件從“ if（！empty（$ _ POST））”更改為“ if（$ roleErr ==”“）”。因為如果您未選擇單選按鈕，則“ $ _POST ['gender']，$ _ POST [ 'role']“不顯示您的帖子
<?php session_start();
// define variables and set to empty values
$fname=$gender=$dept=$email=$uname=$pswd=$cpswd=$role="";
$fnameErr=$genderErr=$deptErr=$emailErr=$unameErr=$pswdErr=$cpswdErr=$roleErr="";
if ($_SERVER["REQUEST_METHOD"] == "POST")
{
if (empty($_POST["fname"]))
{
$fnameErr = "Name is required";
}
else
{
$fname = test_input($_POST["fname"]);
// check if name only contains letters and whitespace
if (!preg_match("/^[a-zA-Z ]*$/",$fname))
{
$fnameErr = "Only letters and white space allowed";
}
}
if (empty($_POST["gender"]))
{
$genderErr = "Gender is required";
}
else
{
$gender = test_input($_POST["gender"]);
}
if (empty($_POST["dept"]))
{
$deptErr = "Department is required";
}
else
{
$dept = test_input($_POST["dept"]);
}
if (empty($_POST["email"]))
{
$emailErr = "Email is required";
}
else
{
$email = test_input($_POST["email"]);
// check if e-mail address is well-formed
if (!filter_var($email, FILTER_VALIDATE_EMAIL))
{
$emailErr = "Invalid email format";
}
}
if (empty($_POST["uname"]))
{
$unameErr = "Username is required";
}
else
{
$uname = test_input($_POST["uname"]);
}
if (empty($_POST["pswd"]))
{
$pswdErr = "Password is required";
}
else
{
$pswd = test_input($_POST["pswd"]);
}
if (empty($_POST["cpswd"]))
{
$cpswdErr = "Password is required";
}
else
{
$cpswd = test_input($_POST["cpswd"]);
}
if (empty($_POST["role"]))
{
$roleErr = "Role is required";
}
else
{
$role = test_input($_POST["role"]);
}
if ($roleErr =="")
{
$host="localhost"; // Host name
$username="root"; // Mysql username
$password=""; // Mysql password
$db_name="testmra"; // Database name
// Connect to server and select databse.
$conn=mysqli_connect($host,$username,$password) or die("cannot connect");
mysqli_select_db($conn,$db_name);
$name = mysqli_real_escape_string($conn, $_POST['fname']);
$gender =mysqli_real_escape_string($conn,$_POST['gender']);
$department = mysqli_real_escape_string($conn, $_POST['dept']);
$email = mysqli_real_escape_string($conn, $_POST['email']);
$username = mysqli_real_escape_string($conn, $_POST['uname']);
$userpass = mysqli_real_escape_string($conn, $_POST['pswd']);
$cpass = mysqli_real_escape_string($conn, $_POST['cpswd']);
$role= mysqli_real_escape_string($conn, $_POST['role']);
$res=mysqli_query($conn,"SELECT username FROM newuser WHERE username='$username'");
$row=mysqli_fetch_row($res);
if($row>0)
{
echo '<script language="javascript">';
echo 'alert("Username '.$username.' already been selected")';
echo '</script>';
}
elseif($userpass!=$cpass)
{
$cpswdErr="Password doesn't match";
}
else
{
$sql="INSERT INTO newuser (name,gender,department,emailid,username,userpass,role)VALUES('$name','$gender','$department','$email','$username','$userpass','$role')";
if (mysqli_query($conn,$sql))
{
header("location:trialregister.php");
exit();
}
else
{
die('Error: Cannot connect to db' );
}
}
}
}
else { }
function test_input($data)
{
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
<html>
<head><title>MRA</title></head>
<body>
<form method="POST" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
<table align="center" cellspacing="5" cellpadding="5">
<tr><td align="right">Full Name :</td><td><input type="text" name="fname"></td><td align="left"><font color="red"><?php echo $fnameErr; ?></td></tr>
<tr><td align="right">Gender :</td><td><input type="radio" name="gender" value="Male">Male<input type="radio" name="gender" value="Female">Female</td><td align="left"><font color="red"><?php echo $genderErr; ?></td></tr>
<tr><td align="right">Department :</td><td><select name="dept">
<option value="">Select Department</option>
<option value="IT">IT</option>
<option value="HR">HR</option>
<option value="Accounts">Accounts</option>
<option value="Sales">Sales</option>
</select></td><td align="left"><font color="red"><?php echo $deptErr; ?></td></tr>
<tr><td align="right">EmailId :</td><td><input type="text" name="email"></td><td align="left"><font color="red"><?php echo $emailErr; ?></td></tr>
<tr><td align="right">Username :</td><td><input type="text" name="uname"></td><td align="left"><font color="red"><?php echo $unameErr; ?></td></tr>
<tr><td align="right">Password :</td><td><input type="password" name="pswd"></td><td align="left"><font color="red"><?php echo $pswdErr; ?></td></tr>
<tr><td align="right">Confirm Password :</td><td><input type="password" name="cpswd"></td><td align="left"><font color="red"><?php echo $cpswdErr; ?></td></tr>
<tr><td align="right">Role :</td><td><input type="radio" name="role" value="User">User<input type="radio" name="role" value="Admin">Admin</td><td align="left"><font color="red"><?php echo $roleErr; ?></td></tr>
<tr><td colspan="3" align="center"><input type="submit" name="submit" value="Submit"> <input type="reset" name="reset" value="Reset"> <input type="button" name="cancel" value="Cancel"></td></tr>
</table>
</form>
</body>
</html>
<form action="" method="post">
Why don't they play poker in the jungle?<br>
<input type="radio" name="jungle" value="treefrog"> Too many tree frogs.<br>
<input type="radio" name="jungle" value="cheetah"> Too many cheetahs.<br>
<input type="radio" name="jungle" value="river"> Too many rivers.<br><br>
Check the box if you want your answer to be graded:
<input type="checkbox" name="grade" value="yes"><br><br>
<input type="submit" name="submit" value="Submit"><br>
</form>
單選按鈕的Java驗證
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