What are the key points of the secondary development of Drupal7 form forms?
This article mainly explains the "what are the main points of the secondary development of Drupal7 form forms". The content of the explanation in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn what are the key points of the secondary development of Drupal7 form forms.
Three main points are summarized:
1. After the page is submitted and processed by # submit, the redirect needs to jump to another page.
When there is a destination parameter in the 2.url path, the page jumps directly to the url referred to by destination, which is out of control.
How to implement multiple steps forms multiple steps in a 3.form form, or how to get the submitted value after the form is submitted.
1. Form form redirect (jump) to another page
The value of $form_state ['redirect'] can be a string or an array, and after the value passes through url, a jump address is generated.
The copy code is as follows:
$form_state ['redirect'] = array (
'node/123'
Array (
'query' = > array (
'foo' = >' bar'
),
'fragment' = >' baz'
}
/ / the page will jump to node/123?foo=bar#baz
The copy code is as follows:
$form_state ['redirect'] =' node/123'
/ / the page will jump to node/123
If you do not specify a value for $form_state ['redirect'], it jumps to the current page by default. Drupal_goto (current_path (), array ('query' = > drupal_get_query_parameters (); this is done in API.
The address of the jump can also be changed when the Form form destination (destination) is specified
In the drupal_goto function, you can see that if there is a destination parameter in the url path, the page goes directly to the link pointed to by destination, resulting in different pages that should have been redirect jump after multiple buttons under some forms are submitted.
So in the # submit function of form, you can delete destination directly during some operations.
The copy code is as follows:
If (isset ($_ GET ['destination'])) {
$form_state ['redirect'] = array (' next_step_page_url', array ('query' = > drupal_get_destination ()
Unset ($_ GET ['destination'])
}
My approach is to redefine a url and continue to pass the destination, but delete the destination in $_ GET. However, the jump of destination as a destination is often used.
Third, the Form form implements multiple steps multiple steps, and the Form form is reloaded to obtain the value submitted by Form.
In the final analysis, these questions all mean the same thing, that is, to keep the form submitted. Instead of refreshing the page. Simply execute the following code in the # submit function of the form form:
The copy code is as follows:
If ($form_state ['values'] [' op'] = = t ("Next Step")) {
$form_state ['rebuild'] = TRUE
$form_state ['storage'] [' users'] = $form_state ['values'] [' users']
}
The value of $form_state ['storage'] [' users'] is available in the define definition of form.
Refer to Drupal7 related API functions:
Drupal_redirect_form
Drupal_goto
Drupal_get_destination
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