I need to customise my forms in drupal so that each field has a value placed in it using a php script.
I have a php script which takes a url and gets a page title and meta description. It's easy enough to pass these values into a form by placing the required php in the input value. I can do this on a static 'test' form.
However, I'm not sure how to do this with a node form as I don't directly have access to the input value.
Any ideas or solutions would be greatly appreciated.
Use hook_form_alter() in order to alter some existing form entity. A basic knowledge about Form API and module development is sufficient.
I'd suggest using JavaScript to accomplish this since it's very good at manipulating form values (in Drupal too). If you can get the variables in JavaScript then it would be as simple as setting the input id value on page load.
Related
I'm using Drupal 7 and HAVE to use the Form Maker (https://drupal.org/project/drupal-form) module. Since it's not a normal form, I don't know how to do something like hooking as Drupal form submission Q/A explains for normal forms.
The available options for "action after submission" for those in-database forms are:
Stay on form.
Link to an article.
Display custom text.
Redirect to an URL.
Is there any way I can handle the form submission? e.g.: Is there a way to reference the form state for the submitted form in the url I specify if using (e.g.) option 4? (or whatever mechanism exists to recover that data by knowing+referencing the submitted record).
BTW I'm a total drupal n00b, and couldnt Find TFM to R (so I can follow the RTM principle) about that special issue in the Form Maker doc.
It looks like this module still uses the form API, so you should just be able to use hook_form_alter() to modify these forms. I'm sure there's some kind of naming convention for the IDs of these forms, which will allow you to apply changes exclusively to form maker forms.
If you need to customize the handling of form submissions, you can include your own submit handler by using the #submit form attribute. Note: the example in the link adds the submit handler to a field in the form, but in most cases I add the submit handler to the form array itself. (i.e. $form['#submit'] = array("submit_callback"))
Edit in response to comments
You do not need to reference a form_id when invoking hook_form_alter(). Instead, you can invoke it globally, which will cause drupal to call your hook on every form. As you can see from the documentation link I provided, the $form_id is passed to the function, and you can use that to conditionally modify the form. Please look at the comments on the documentation page for usage examples.
Unless these forms are being embedded using a third party service, if this module is actually legitimate it will be hooking its forms through the form API. Implement hook_form_alter(), and print off the form_id's that are passed to the function. Go to a page that has one of this forms on it, and see what gets printed.
(Also, [form_id]_form_alter() is not the correct syntax for invoking this hook on specific forms. Should be hook_form_[form_id]_alter(), where hook is your module name.)
I'm trying to make an app on Android that send an URI that auto-populate the "RFC Emisor" and "RFC Receptor" of this web page:
https://verificacfdi.facturaelectronica.sat.gob.mx, if I'm correct those two inputs have the id of:
ctl00_MainContent_TxtRfcEmisor
ctl00_MainContent_TxtRfcReceptor
I already tried this but it didn't work:
https://verificacfdi.facturaelectronica.sat.gob.mx/&ctl00_MainContent_TxtRfcEmisor=123456789&ctl00_MainContent_TxtRfcReceptor=123456789
there is a way to achieve what I want?
The short answer is no. The browser won't automatically detect the URL parameter and pre-populate any form fields. A back-end PHP / ASP.NET page can read the value from the request and generate the HTML fields with the specified values. Alternatively, the page could use JavaScript to set the field values when the document finishes loading.
But all of this depends on changes to the target web page. If you do not have the ability to modify that page, I'm afraid there's very little you could do.
You might be able to duplicate the form on your own page, and send the form data to the target—effectively bypassing the form on the other page and 'faking' your own, but if the target system does some kind of validation to prevent posting forms across domain names, this probably won't work either. You may have create the form and process it yourself, replicating the entire form interaction programmatically when a user submits a form to your server. In any case, none of these options are particularly graceful.
I have a form in my application with a multi select. I'm using CI's form helper to build my forms, so the build of the element looks like this:
return form_multiselect('authors[response][]', $faculty->get_all_for_multiselect(),
$pre_selected, $additional_attributes);
This is all well and good if the items are in the database ($pre_selected gets existing responses). However, I'm also running the form through CI's form validation, and when that happens, if validation fails, then the multi select loses the values that had been selected.
I'm sure this is something simple that I'm just over looking, so hopefully someone can help me out here.
Adding more information
The field is marked as required so it is going through the validator (although it will always pass as I'm automatically selecting the current user).
(I'm assuming $pre_selected is an array of values?)
You can reset selected values after failed form submit using the $_POST array.
Since you're already using $pre_selected, you should be able to use the following:
return form_multiselect('authors[response][]', $faculty->get_all_for_multiselect(),
array_unique(array_merge($pre_selected, $_POST['response'])), $additional_attributes);
I am working on a pair of form fields the directly effect one another. Specifically the problem I am dealing with is that we have thousands of groups users can join on this website that I have been working on. We are creating some administrative analytics forms for the site. Part of those forms is filtering by group.
The problem is that most of the people don't know the name of a group off the top of their heads, only what it starts with. So instead of using auto-complete we came up with two dropdowns. The first contains the options A through Z, letters of the alphabet which the group names begin with. The second dropdown contains all of the groups beginning with the selected letter.
The concept is simple enough and we were able to implement the AJAX pretty easy with jQuery. But this causes validation errors. After some research I found that this has to do with Drupal form caching. The solution is to use the ahah functions.
The problem with that is that all the instructions I have found so far deal with ahah actions for the specified field updating itself, not another field. So I am trying to figure out how to get the list of letters to update the group list using ahah and registering the new values with the form cache.
One solution I found was to simply load all the values on the page in a hidden dropdown and then just load up those in the set in the visible one as needed. But that creates a bunch of problems because the client uses almost exclusively IE and we have seen IE choke when given huge lists like that. Especially with the lists stored in JavaScript. So we need a light-weight solution.
Any thoughts? Ideas?
In a nutshell AHAH works like this:
Form gets generated with an empty $form_state
When an element that has the #ahah property gets changed an ajax call is made to the url specified as path in the #ahah property.
The callback at that url does this:
Retrieves the form from the form cache
Processes the form
Rebuilds the form with a current $form_state so that it can add / change elements based on that
The form is put in the form cache to avoid validation errors
The form is rendered and returned as JSON
Drupal replaces the contents of the wrapper div with the new form.
In your case you'll need to make your form generation function aware of the values selected in $form_state. It would have to:
Generate the letters drop-down
Look into $form_state and see if there is a letter selected. If so, generate the second drop-down based on the selected value.
The callback function would implement the form caching and rebuilding.
There are good explanations with code for the callback function here:
http://drupal.org/node/348475
http://drupal.org/node/331941
I actually got the answer on another StackExchange site. His suggestion to use the example module to come up with the solution worked very well.
Solution found here: https://drupal.stackexchange.com/questions/35048/using-drupal-6s-form-ahah-to-have-one-dropdown-field-update-the-values-of-a-sec
I am trying to do something really basic but can not seem to find a tutorial for it.
I have created a simple web form using HTML what I need todo is create a php file that will read the web form, open a new browser window (or display in same page) the contents of the web form, do toy guys have any tutorials on this?
Many thanks
Chris
I'm sure many will post different links to tutorials that they like, but I thought I would just give you the basic. The key parts to the form are the method and action. The Method attribute tells ths browser how to submit the data, either through GET or POST. The action attribute tells the browser where to submit the form. (In your case it will be, somepage.php) If you ever need the form to submit back to itself, you can here use explicitly type the page name or you can use use PHP to dynamically insert the page name. Finally, make sure that all your form fields use the name attribute, as this is how php will access the elements.
On the php side of things, your form variables will be stored in either $_GET or $_POST depending on how on method you used to submit your form. For example, assume you have a input element of type text with the name 'FirstName'. Within php you can access this by doing
<?php
var firstName = $_GET['FirstName'];
?>
This should be enough to get you started. Be sure to check out the php docs and the other tutorials listed on this page for a more details.
Please look at this tutorial: http://www.learnphp-tutorial.com/HtmlForms.cfm
And you can find many more tutorials if you search it on Google.
This should help : http://www.php-mysql-tutorial.com/wikis/php-tutorial/php-forms.aspx