POST服务器端表单验证

Question

有一些问题确切地说明了我在下面的php脚本中发生错误的位置。它通过来自HTML表单的帖子获取数据。然后在将它们插入数据库之前尝试一些验证。任何人发现任何东西

<?php 
if(isset($_POST['submit_form'])) 
{ 

validate_data($data) 
{ 
    $data = trim($data); 
    $data = stripslashes($data); 
    $data = strip_tags($data); 
    $data = htmlspecialchars($data); 
    $data = mysqli_real_escape_string($data); 
return $data; 
} 
$address = validate_data($_POST['name']); 
    $address = validate_data($_POST['address']); 
    $zipcode = validate_data($_POST['zipcode']); 
    $county = validate_data($_POST['county']); 
    $phone = validate_data($_POST['phone']); 
    $email = validate_data($_POST['email']); 
    $password = validate_data($_POST['password']); 
    $pwVerified = validate_data($_POST['pwVerified']); 

//create connection 

// Check connection 
if ($conn->connect_error) { 
    die("Connection failed: " . $conn->connect_error); 
} 

$sql = "INSERT INTO company (name, address, zipcode, county, phone, email, password, pwVerified) 
VALUES 
       ('$name', '$address', '$zipcode','$county','$phone', '$email', '$password', '$pwVerified')"; 

if ($conn->query($sql) === TRUE) { 

    // echo "New record created successfully"; 
} else { 
    echo "Error: " . $sql . "<br>" . $conn->error; 
} 

$conn->close(); 

}else 
{ echo "there is a problem";} 
include 'sign.php'; 

?> 

Answer 1

应该功能 VALIDATE_DATA（$数据）。评论1和2。谢谢。

<?php 
if(isset($_POST['submit_form'])) 
{ 

function validate_data($data) 
{ 
    $data = trim($data); 
    $data = stripslashes($data); 
    $data = strip_tags($data); 
    $data = htmlspecialchars($data); 
    $data = mysqli_real_escape_string($conn, $data); 
return $data; //the rest