使用php代码的验证表单
嗨，我正试图建立一个表单，并插入数据到我的数据库它的工作完美现在我想让它验证使用php，以防止跨输入我是初学者在php所以p；放松点，我需要帮助使用php代码的验证表单,php,forms,Php,Forms,嗨，我正试图建立一个表单，并插入数据到我的数据库它的工作完美现在我想让它验证使用php，以防止跨输入我是初学者在php所以p；放松点，我需要帮助 还有php代码 <?php $nameErr = $emailErr = $genderErr = $websiteErr = ""; $con = mysqli_connect('localhost','root',''); if(!$con) {echo'not conn
还有php代码
<?php
$nameErr = $emailErr = $genderErr = $websiteErr = "";
$con = mysqli_connect('localhost','root','');
if(!$con)
{echo'not connect';}
if(!mysqli_select_db($con,'form'))
{echo'not selected';}
$name=$_POST['name'];
$phone=$_POST['phone'];
$nationality=$_POST['nationality'];
$country=$_POST['country'];
$sql = "INSERT INTO newform(Name,Number,Nationality,Country) VALUES('$name','$phone','$nationality','$country')";
if(!mysqli_query($con,$sql))
{echo'not insert';}
else
{
echo'insertes';
}
header("refresh:2;url=form.php");
?>
名字：
电话：
国籍：
国家：
不是免费的代码编写服务。您应该尝试自己编写代码。之后，如果你有问题，你可以张贴你已经尝试了一个明确的解释什么是不工作，并提供一个解决方案。我建议你读一个好的问题和答案。另外，请务必使用阅读参考链接：
<!DOCTYPE HTML>
<html>
<head>
</head>
<body>
<?php
$error = false;
$nameErr = $phoneErr = $nationalErr = $countErr = "";
$con = mysqli_connect('localhost','root','');
if(!$con)
{
echo 'not connect';
}
if(!mysqli_select_db($con,'form'))
{
echo' DB not selected';
}
if(isset($_POST['submit'])){
$name=$_POST['name'];
$phone=$_POST['phone'];
$nationality=$_POST['nationality'];
$country=$_POST['country'];
if($name ==""){
$error = true;
$nameErr = "Name field is empty";
}
if($phone ==""){
$error = true;
$phoneErr = "phone field is empty";
}
if($nationality ==""){
$error = true;
$nationalErr = "nationality field is empty";
}
if($country ==""){
$error = true;
$countErr = "country field is empty";
}
if($error == false){
$sql = "INSERT INTO newform(Name,Number,Nationality,Country) VALUES($name,$phone,$nationality,$country')";
if(!mysqli_query($con,$sql))
{
echo 'Values not insert';
}else
{
header("refresh:2;url=form.php");
}
}
}
?>
<form method="post">
First name:<br>
<input type="text" name="name">
<p style="color:red"><?php echo $nameErr ?></p>
<br>
phone:<br>
<input type="text" name="phone">
<p style="color:red"><?php echo $phoneErr ?></p>
<br><br>
Nationality:<br>
<input type="text" name="nationality">
<p style="color:red"><?php echo $nationalErr ?></p>
<br><br>
Country:<br>
<input type="text" name="country">
<p style="color:red"><?php echo $countErr ?></p>
<br><br>
<input type="submit" value="Submit" name="submit">
</form>
</body>