Question

I have this PHP contact form which disallows a submission from an existing IP. I am trying to add the feature to submit one entry per IP, per day.

I have a column in my db table called Date which is datestamping every row. I know I need to create my if statement with 2 conditions… I am just not sure how to check the DB before submitting a new entry. Any help is appreciated. Thanks.

CODE SNIPPET:

$ip = gethostbyname($_SERVER['REMOTE_ADDR']);

mysql_select_db($database, $connection);
$QUERY = "SELECT COUNT(IP) AS `count` FROM `contest` WHERE IP = '$ip'";
$RESULT = mysql_query($QUERY) or die(mysql_error());

// Read the firs row
$row = mysql_fetch_assoc($RESULT);

// Check how many rows MySQL counted
if($row['count'] > 0) {
header ('Location: valueexists.html');
}
else {

//save the data on the DB

mysql_select_db($database, $connection);

$insert_query = sprintf("INSERT INTO contest (Name, Email_Address, Phone, Company_Name, Company_Address, Date, ip) VALUES (%s, %s, %s, %s, %s, NOW(), %s)",

Answer 1

Your structure is correct, to make a query with two conditions, simply add a AND to it:

$query = "SELECT COUNT(ip) AS count FROM contest WHERE ip = '$ip' AND DATE(date) = CURDATE()";

This will count all rows in the contest table with that IP and which have been submitted on that specific date. Note that I took “date” as your fieldname as I’m unaware of your table structure, so adapt it to the one you created.

Edit
I just noticed you are using NOW() to store your datetime in your database, so I changed my query to make use of the DATE() function. This extracts the date part of the date or datetime expression of the value as can be seen here.

Hope this helps!