https://www.machform.com/forums/ MachForm Community Forums Topic: Limit drop down options once they have been selected on a form submission en Tue, 05 May 2026 07:53:21 +0000 https://www.machform.com/forums/topic/limit-drop-down-options-once-they-have-been-selected-on-a-form-submission#post-18712 Mon, 15 Jul 2013 23:45:45 +0000 akerr 18712@https://www.machform.com/forums/ <p>Thanks for the followup.</p> <p>As a feature request, 123 Contact Form has a neat little tool here: <a href="http://www.123contactform.com/docs/how-to-limit-the-number-of-times-an-option-is-selected/" rel="nofollow">http://www.123contactform.com/docs/how-to-limit-the-number-of-times-an-option-is-selected/</a></p> <p>Which allows you to select a number of times a field can be selected, thanks for the great product! </p> https://www.machform.com/forums/topic/limit-drop-down-options-once-they-have-been-selected-on-a-form-submission#post-18684 Sun, 07 Jul 2013 22:56:47 +0000 redityo 18684@https://www.machform.com/forums/ <p>You can not disable the option or disable it, but you can create custom validation to the selected drop down option.<br /> So if someone select the option which already submitted, the form would show an error.</p> <p>To do this, you need to customize "includes/post-functions.php" file, I assume your form id is "25481" and the drop down element id is "1".<br /> Then go to around line 1657, you will see these code :</p> <pre><code>$process_result[&#39;form_redirect&#39;] = $form_redirect;</code></pre> <p>then put these code above that line </p> <pre><code>if ($form_id == 25481) { if (!empty($table_data[&#39;element_1&#39;])) { $query = &quot;select count(id) total_entry from &quot; . MF_TABLE_PREFIX . &quot;form_{$form_id} where element_1=? and status=1&quot;; $params = array($table_data[&#39;element_1&#39;]); $sth = mf_do_query($query,$params,$dbh); $row = mf_do_fetch_result($sth); if(!empty($row[&#39;total_entry&#39;])){ $error_elements[&#39;1&#39;] = &#39;Sorry, but this option already selected.&#39;; } } }</code></pre> <p>you need to change the id's number with yours. </p> https://www.machform.com/forums/topic/limit-drop-down-options-once-they-have-been-selected-on-a-form-submission#post-18655 Thu, 04 Jul 2013 03:52:37 +0000 akerr 18655@https://www.machform.com/forums/ <p>I see you can limit the number of form submissions as a whole, but I'm wondering if there's a way to disable an option in a drop-down list once a user has made a submission for that particular time, so for instance:</p> <p>Select list options<br /> 8am<br /> 9am<br /> 10am<br /> 11am</p> <p>So once 8am and 9am has been submitted those options would no longer show-up on the form.</p> <p>Thanks for your time. </p>