How to prevent repeated forms from being submitted during page refreshing?

How to prevent repeated forms from being submitted during page refreshing! How to prevent repeated forms from being submitted during page refreshing! Hope you have code, comments, and ideas. thank you !, Use Cookie processing to record the status of form submission using Cookie. you can check whether the form has been submitted based on its status. See the following code: 1. & lt ;? How does php2. I prevent repeated forms from being submitted when pages are refreshed!
How to prevent repeated forms from being submitted during page refreshing!
Hope you have code, comments, and ideas. thank you!


------ Solution --------------------
Use Cookie processing to record the status of form submission using Cookie. you can check whether the form has been submitted based on its status. See the following code:

1. <? Php
2. if (isset ($ _ POST ['go']) {setcookie ("tempcookie", "", time () + 30 );
3. header ("Location:". $ _ SERVER [PHP_SELF]); exit ();
4.} if (isset ($ _ COOKIE ["tempcookie"]) {
5. setcookie ("tempcookie", "", 0); echo "form submitted ";
6.}?>
If the client disables the Cookie, this method does not have any effect. Please note that.

3. using Session processing with the PHP Session function can also prevent repeated submission of PHP forms. The Session is stored on the server. during PHP running, you can change the Session variable. The next time you access this variable, you get a new value. therefore, you can use a Session variable to record the value submitted in the form. if the value does not match, it is considered that the user is submitting it repeatedly. See the following code:

1. <? Php
2. session_start (); // Generate a random number based on the current SESSION
3. $ code = mt_rand (usd00 );
4. $ _ SESSION ['code'] = $ code;
5.?>
The random number is passed as a hidden value on the page form. the code is as follows:

1. <input type = "hidden" name = "originator" value = "<? = $ Code?> ">
The PHP code on the receiving page is as follows:

1. <? Php
2. session_start ();
3. if (isset ($ _ POST ['originator']) {
4. if ($ _ POST ['originator'] = $ _ SESSION ['code']) {
5. // The statement for processing the form, omitted
6.} else {
7. echo 'Please do not refresh this page or submit the form again! ';
8 .}
9.}?>

There are two ways not posted, please: http://www.phpnewer.com/index.php/Cjwt/detail/id/356