https://legacy.forums.gravityhelp.com/topic/perform-a-calculation-and-change-values-being-submitted Gravity Support Forums Topic: perform a calculation and change values being submitted. en-US Sun, 19 Apr 2026 23:38:11 +0000 http://bbpress.org/?v=1.0.1 q https://legacy.forums.gravityhelp.com/search.php https://legacy.forums.gravityhelp.com/topic/perform-a-calculation-and-change-values-being-submitted#post-3950 Fri, 12 Mar 2010 16:39:54 +0000 Idealien 3950@https://legacy.forums.gravityhelp.com/ <p>How would you (or is there a way to) identify the _POST values by name rather than input_7 / etc?</p> <p>I'd like to use something similar to generate a password string via PHP and add it into a hidden field and have it display in the email notification. Atleast until the feature for user generation is in place :) </p> https://legacy.forums.gravityhelp.com/topic/perform-a-calculation-and-change-values-being-submitted#post-3727 Wed, 03 Mar 2010 13:46:21 +0000 Alex Cancado 3727@https://legacy.forums.gravityhelp.com/ <p>Very nice! Glad you figured it out. </p> https://legacy.forums.gravityhelp.com/topic/perform-a-calculation-and-change-values-being-submitted#post-3719 Wed, 03 Mar 2010 06:06:43 +0000 jorges 3719@https://legacy.forums.gravityhelp.com/ <p>Cracked it. I'm posting the code in case another user wants to do something similar. With some modification this can be used for scoring surveys, etc.</p> <pre><code>add_action(&quot;gform_pre_submission&quot;, &quot;pre_submission_handler&quot;); function pre_submission_handler($form_meta){ global $_POST; if($form_meta[&quot;id&quot;] != &#39;1&#39;){ return; } $calculation = (($_POST[&quot;input_2&quot;] / $_POST[&quot;input_1&quot;]) - 1) * 100; $_POST[&quot;input_7&quot;] = $calculation; $_POST[&quot;input_1&quot;] = &#39;0&#39;; $_POST[&quot;input_2&quot;] = &#39;0&#39;; }</code></pre> <p>Thanks again for your help. </p> https://legacy.forums.gravityhelp.com/topic/perform-a-calculation-and-change-values-being-submitted#post-3718 Wed, 03 Mar 2010 05:24:07 +0000 jorges 3718@https://legacy.forums.gravityhelp.com/ <p>DOH!</p> <p>What a beginners mistake...</p> <p>Got another question on how I can make sure this only runs for one form but I'll open another topic for that.</p> <p>Many thanks for your help, the plugin is everything I wanted and more and I'll be sure to recommend it. </p> https://legacy.forums.gravityhelp.com/topic/perform-a-calculation-and-change-values-being-submitted#post-3700 Tue, 02 Mar 2010 13:14:01 +0000 Alex Cancado 3700@https://legacy.forums.gravityhelp.com/ <p>jorges,<br /> You were close. Only needed to declare the $_POST variable as global. Try the following:</p> <pre><code>add_action(&quot;gform_pre_submission&quot;, &quot;pre_submission_handler&quot;); function pre_submission_handler($form_meta){ global $_POST; $calculation = (($_POST[&quot;input_2&quot;] / $_POST[&quot;input_1&quot;]) - 1) * 100; $_POST[&quot;input_3&quot;] = $calculation; echo $_POST[&quot;input_3&quot;]; }</code></pre> https://legacy.forums.gravityhelp.com/topic/perform-a-calculation-and-change-values-being-submitted#post-3694 Tue, 02 Mar 2010 11:27:16 +0000 jorges 3694@https://legacy.forums.gravityhelp.com/ <p>That would be very helpful. Many thanks. </p> https://legacy.forums.gravityhelp.com/topic/perform-a-calculation-and-change-values-being-submitted#post-3692 Tue, 02 Mar 2010 11:20:51 +0000 Kevin Flahaut 3692@https://legacy.forums.gravityhelp.com/ <p>We'll get our lead developer to take a look at this one and offer a suggestion. We're always busy with other support requests as well so please be patient and we'll get back to you as soon as possible with something. </p> https://legacy.forums.gravityhelp.com/topic/perform-a-calculation-and-change-values-being-submitted#post-3691 Tue, 02 Mar 2010 10:59:07 +0000 jorges 3691@https://legacy.forums.gravityhelp.com/ <p>It would be nice if someone would tell me if I'm wasting my time here or will this request be eventually looked at. </p> https://legacy.forums.gravityhelp.com/topic/perform-a-calculation-and-change-values-being-submitted#post-3683 Tue, 02 Mar 2010 05:32:01 +0000 jorges 3683@https://legacy.forums.gravityhelp.com/ <p>bump </p> https://legacy.forums.gravityhelp.com/topic/perform-a-calculation-and-change-values-being-submitted#post-3660 Mon, 01 Mar 2010 12:14:07 +0000 jorges 3660@https://legacy.forums.gravityhelp.com/ <p>Hi,</p> <p>I'm trying to take the values entered in two fields in a given form and perform a calculation with them before storing the result on the database. I'm also trying to set the two field's values to 0 before storing the result.</p> <p>Currently I'm using the pre_submission_handler hook and I can access my values and calculate them.</p> <p>What I'm stuck with is how do I then go about setting the values that are going to be submitted to the database to whatever I want.</p> <p>Being a complete newbie at php I managed to somehow get to this:<br /> <pre><code>add_action(&quot;gform_pre_submission&quot;, &quot;pre_submission_handler&quot;); function pre_submission_handler($form_meta){ $calculation = (($_POST[&quot;input_2&quot;] / $_POST[&quot;input_1&quot;]) - 1) * 100; $_POST[&quot;input_3&quot;] = $calculation; echo $_POST[&quot;input_3&quot;]; }</code></pre> <p>This displays the right calculation but does not store it on the database.<br /> Any help would be greatly appreciated. </p>