get file download link in drupal

//set fid to your file’s fid.
//we can get fid from file_managed table
$fid = 1;

//build a link to the file by loading the file object and generating from the uri.
$file_download_link = file_create_url( file_load( $fid )->uri );

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How to remove N/A from radio button options in drupal7?

How to remove N/A from radio button options in drupal7?

If you dont want to show the N/A option in the radio buttons option lists, than make that field mandatory.
When you make that field required it will remove the N/A option.

But if you dont want to make that field required and also dont want to show N/A option, then you use theme hook function
theme_form_element($variables) to alter that.

function mytheme_form_element($variables) {
$element = $variables['element'];
// Disable radio button N/A
if ($element['#type'] == 'radio' && $element['#return_value'] === '_none') {
$variables['element']['#attributes']['disabled'] = TRUE;
}
return theme_form_element($variables);
}

you can use your theme’s name in place of mytheme in function name, and add this function to your theme’s template.php file.

Hide using CSS:

.form-radios .form-disabled {
display: none;
}

OOP Introduction

Hello friends,

I am here to teach you Object oriented principles in very simple way.

Previously we were using functions only for more complex programs not object oriented method, and it worked, than why wee need to use OOP??

Because it contain variable and functions together in one unit, and its called object. and whole object oriented programming based on this object.

and containg the variable data and functions in one unit called the Encapculation.

for coding forget all length definations and keep these short terms in mind:

Class: a collection of vaiables and methods
Object: a thing or name
Instantiate: crating an object
Method: function of class
Property: variable of class

Set values in multiple select list using javascript and jQuery

We can make multiple option selected in our HTML form using JavaScript and jQuery.

In Javascript:

document.getElementById('elementId').value = ["optionVal1", "optionVal2", "optionVal3"];

and in Jquery Its pretty:

$("#elementId").val(["optionVal1", "optionVal2", "optionVal3"]);

How to add HTML in drupal form

If you want to add HTML in Drupal form using form api. you need to use #markup in that form field.

See the below example of form field:

 $form['form_field'] = array(
 
  '#markup' => 'HTML code here', // and add HTML in #markup. 
 
);

get drupal taxonomy term list using vocabulary

Get drupal 7 taxonomy term list using vocabulary machine name

function get_taxonomy_terms_by_vocabulary($vocabulary_machine_name){

$term_data = array();
$vid = taxonomy_vocabulary_machine_name_load($vocabulary_machine_name)->vid;
$terms = taxonomy_get_tree($vid);

//If you want to get more custom fields value, than use
//$terms = entity_load('taxonomy_term', FALSE, array('vid' => $vid));

foreach($terms as $term){
$term_data[$term->tid] = $term->name;
}

return $term_data;
}

Drupal role, module & permission

SELECT r.name,p.module,p.permission FROM role_permission p

left join role r on p.rid=r.rid

order by name,module, permission

Submit drupal form & node_save using hook_submit_form in Drupal 7

function user_identity_form_submit($form, &$form_state) {
  global $user;
  global $base_url;
  //variable_set('identity_image', $form_state['values']['identity_image']);
  $file = file_load($form_state['values']['identity_image']);
  if($file){
    $file->status = FILE_STATUS_PERMANENT;
    file_save($file);
    file_usage_add($file, 'user_identity', 'user_identity', $file->uid);

    //create node identity
    $node = new stdClass();
    $node->type = 'user_identity';
    node_object_prepare($node);
    $node->title = 'Identity: '.$user->name;
    $node->field_photo_document['und'][] = (array)$file;
    $node->language = LANGUAGE_NONE;
    $node->uid = $user->uid;
    $node->status = 0;
    node_save($node);
...

Display image after upload using managed_file in Drupal 7

function MODULE_NAME_theme() {
    return array(
      'MODULE_NAME_image' => array(
        'render element' => 'form',
      ),
    );
}

function theme_MODULE_NAME_image($variables) {
    $form = $variables['form'];
    if(isset($form['#file']->uri))
        $form['identity_image']['#markup'] = theme('image_style', array('style_name' => 'thumbnail', 'path' => file_build_uri(file_uri_target($form['#file']->uri))));
    $output = drupal_render_children($form);
    return $output;
}

function MODULE_NAME_form($form, &$form_state) {
    $form = array();
        $form = array();
        $form['identity_image'] = array(
          '#title' => t('Upload photo document'),
          '#type' => 'managed_file',
          '#required' => true,
          '#upload_location' => 'public://identity/'.$order->uid.'/',
          '#upload_validators' => array(
            'file_validate_extensions' => array('jpg png jpeg'),
          ),
          '#theme' => 'MODULE_NAME_image',
        );
        $form['submit'] = array(
          '#type' => 'submit',
          '#value' => t('Approved'),
        );
return $form;
}

Get all fields from a field collection in Drupal 7

function get_field_collection_fields($field){
$fc_instances = field_info_instances('field_collection_item', $field);
$fc_fields = array_keys($fc_instances);
return $fc_fields;
}