Re-add old blog posts from Astro

source/_posts/how-add-date-popup-calendar-custom-form.md

@@ -0,0 +1,44 @@
+---
+title: How to add a date popup calendar onto a custom form
+date: 2012-05-23
+excerpt: How to use a date popup calendar within your custom module.
+tags:
+    - calendar
+    - date
+    - drupal
+    - drupal-7
+    - drupal-planet
+    - form-api
+    - forms
+---
+
+How to use a date popup calendar within your custom module.
+
+First, I need to download the
+[Date](http://drupal.org/project/date 'Date module on Drupal.org') module, and
+make my module dependent on date_popup by adding the following line into my
+module's .info file.
+
+```ini
+dependencies[] = date_popup
+```
+
+Within my form builder function:
+
+```php
+$form['date'] = array(
+  '#title' => t('Arrival date'),
+
+  // Provided by the date_popup module
+  '#type' => 'date_popup',
+
+  // Uses the PHP date() format - http://php.net/manual/en/function.date.php
+  '#date_format' => 'j F Y',
+
+  // Limits the year range to the next two upcoming years
+  '#date_year_range' => '0:+2',
+
+  // Default value must be in 'Y-m-d' format.
+  '#default_value' => date('Y-m-d', time()),
+);
+```