https://legacy.forums.gravityhelp.com/topic/gform_pre_render-errors-when-simply-trying-to-get-form-id Gravity Support Forums Topic: gform_pre_render errors when simply trying to get form ID en-US Fri, 01 May 2026 06:11:42 +0000 http://bbpress.org/?v=1.0.1 q https://legacy.forums.gravityhelp.com/search.php https://legacy.forums.gravityhelp.com/topic/gform_pre_render-errors-when-simply-trying-to-get-form-id#post-103993 Tue, 18 Dec 2012 10:33:40 +0000 keeneyemedia 103993@https://legacy.forums.gravityhelp.com/ <p>I decided to not try and return the form ID as it appears you can't set a variable (global declaration does not work) outside an add_filter call in WP (not a G form thing).</p> <p>So - instead inside the "gform_pre_render" I'm getting the form ID and then via a case/switch I'm calling various "gform_field_value_FIELDid" and doing what I need to do - then the form renders with all the fields the way I want them...</p> <p>Work fine.</p> <p>Thanks! </p> https://legacy.forums.gravityhelp.com/topic/gform_pre_render-errors-when-simply-trying-to-get-form-id#post-103976 Tue, 18 Dec 2012 09:02:27 +0000 keeneyemedia 103976@https://legacy.forums.gravityhelp.com/ <p>This code (and a bunch more) lives in an include across a series of multiple pages. Based on the page that loads there's a different form. Since this is include code - I need to know WHICH form is on that page and then do certain things based on the form ID.<br /> And here's the thing... line 2 above WORKS - the displayed value is the form ID.<br /> The PRESENCE of the add_filter (setting a variable or not) causes the errors<br /> <pre><code>add_filter(&quot;gform_pre_render&quot;, &quot;update_the_fields&quot;);</code></pre> <p>results in many:<br /> Warning: Invalid argument supplied for foreach() in /home/thisguy/public_html/wp-content/plugins/gravityforms/form_display.php on line X or Y or Z</p> <p>Ultimately what I need to do is invoke a series of add_filter("gform_field_value_FIELDX", "populate_FIELDX"); for the unique fields on each unique form. </p> https://legacy.forums.gravityhelp.com/topic/gform_pre_render-errors-when-simply-trying-to-get-form-id#post-103760 Tue, 18 Dec 2012 00:03:03 +0000 Chris Hajer 103760@https://legacy.forums.gravityhelp.com/ <p>I've never seen the WordPress function "add_filter" used like that.</p> <p>The gform_pre_render filter is designed to set the value of a field, not return a variable. Can you explain how different forms may be loaded on the page but you do not know the form ID? Maybe that will help me come up with a solution with you. </p> https://legacy.forums.gravityhelp.com/topic/gform_pre_render-errors-when-simply-trying-to-get-form-id#post-103640 Mon, 17 Dec 2012 18:06:45 +0000 keeneyemedia 103640@https://legacy.forums.gravityhelp.com/ <p>This should be simple... I'm trying to grab the form ID on the current page using gform_pre_render and then based on the form ID within the function gform_pre_render is calling do some work... (I don't always know which form is going to be loaded on the page) - so here's the simple version of the code:<br /> <pre><code>$i_this_form_id = add_filter(&quot;gform_pre_render&quot;, &quot;update_the_fields&quot;); echo $i_this_form_id; function update_the_fields ($form){ return $form[&quot;id&quot;]; }</code></pre> <p>The thing is - no matter what I do or don't do with the gform_pre_render - it just puts a whole bunch of " Invalid argument supplied for foreach()" errors on my form. BUT the echo in there returns the correct form ID.<br /> Is there a better way to make the determination of which form loaded on a page by ID so I can then run the correct gform_field_value_* operation on the form? This seems to work but there's all those errors where the form goes - why? </p>