stop inserting data in the database when refreshing the page
Header the user to a new page :
$email = $_POST['useremail'];
mysql_query("INSERT INTO table (username, useremail, email) VALUES(`$username','$useremail','$email')");
//best outside the if statement so user isn't stuck on a white blank page.
By doing this the user who refreshes will be refreshing
landing_page.php which means it won't do the insert twice.
best advice: do a check to see if user exists first if so don't insert!
How to stop insert into after refreshing a page
After the data has been inserted to the database, redirect and exit.
Stop Inserting Blank data in Refreshing browser
Just verify if the
$_POST is not empty
$sql="INSERT INTO te(Dat,Sadi,Jam,Washi) VALUES('$_POST[Dat]','$_POST[Sadi]','$_POST[Jam]','$_POST[Washi]')";
if (!mysql_query($sql, $sub))
How to prevent form resubmission when page is refreshed (F5 / CTRL+R)
Use the Post/Redirect/Get pattern. http://en.wikipedia.org/wiki/Post/Redirect/Get
With my website, I will store a message in a cookie or session, redirect after the post, read the cookie/session, and then clear the value of that session or cookie variable.
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