我在将表单数据插入数据库时遇到问题。我可以连接到数据库,因为它不会引发错误但没有插入任何信息。以下是我的代码,任何帮助将不胜感激。
<?php
// string checking
function isValid($str) {
if(!preg_match('/[^A-Za-z0-9.-]/', $str)) {
return true;
} else {
return false;
}
}
// Check for form submission
if(isset($_POST['submit'])){
// Get the POST data
$agree = $_POST['agree'];
$firstname = $_POST['firstname'];
$surname = $_POST['surname'];
$business = $_POST['business'];
$state = $_POST['state'];
$email = $_POST['email'];
// If the T&C box has been ticked
if($agree){
// Validate the POST data
$validationError = '';
// Name Validation
if($firstname == ''){
$validationError .= "Please enter your first name.\n";
} else {
if(is_numeric($firstname)){
$validationError .= "The first name you have supplied cannot contain numbers.\n";
}
if(strlen($firstname) > 50) {
$validationError .= "The first name you have supplied must be less than 50 characters.\n";
}
if(strlen($firstname) < 3) {
$validationError .= "The first name you have supplied is too short.\n";
}
if(isValid($firstname) == false ){
$validationError .= "The first name cannot contain special characters.\n";
}
}
if($surname == ""){
$validationError .= "Please enter your Surname.\n";
} else {
if(is_numeric($surname)){
$validationError .= "The Surname you have supplied cannot contain numbers.\n";
}
if(strlen($surname) > 50) {
$validationError .= "The Surname you have supplied must be less than 50 characters.\n";
}
if(strlen($surname) < 3) {
$validationError .= "The Surname you have supplied is too short.\n";
}
if(isValid($surname) == false ){
$validationError .= "The Surname cannot contain special characters.\n";
}
}
if($state == ''){
$validationError .= "Please select your state.\n";
}
// Email validation
// Function to validate email addresses, taken from here: http://www.linuxjournal.com/article/9585
function check_email_address($email) {
// Set up regular expression strings to evaluate the value of email variable against
$regex1 = '/^[_a-z0-9-][^()<>@,;:\\"[] ]*@([a-z0-9-]+.)+[a-z]{2,4}$/i';
// Run the preg_match function on regex 1
if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email)) {
return false;
} else {
return true;
}
}
if($email != ''){
if(!check_email_address($email)) {
$validationError .= "The email address does not appear to be correct, please try again.\n";
}
} else {
$validationError .= "Please enter your email address.\n";
}
//Start the mySQL connection
if($validationError == ''){
$link = mysql_connect('localhost', '--removed--', '--removed--');
if (!$link) {
$validationError .= "There was an error connecting to the database. Please contact us so that we can fix the problem.\n";
} else {
// Select the db
mysql_select_db("keyinv_seminar", $link);
// Check for an existing entry under that email address
$checkQuery = 'SELECT * FROM seminar WHERE email="' . mysql_real_escape_string($email) . '"';
$result = mysql_query($checkQuery, $link);
if (mysql_num_rows($result) != 0) {
$validationError .= "There is already an entry in the competition, using that email address.\n";
} else {
// There is no existing entry, update the db
$insertQuery = "INSERT INTO seminar (firstname, surname, business, state, email) VALUES ('" . mysql_real_escape_string($firstname) . "', '" . mysql_real_escape_string($surname) . "', '" . mysql_real_escape_string($business) . "', " . mysql_real_escape_string($state) . ", '" . mysql_real_escape_string($email) . "')";
$result = mysql_query($insertQuery, $link);
}
// Close the connection
if($link){
mysql_close($link);
if($validationError == ''){
header('Location: thankyou.php');
}
}
}
}
} else {
$validationError = "You must accept the Terms and Conditions \nin order to enter this contest.";
}
}
?>