How to get drupal custom profile values? - drupal

Question

There is a checkbox added in user profile form, subscribe to daily newsletter. I want to get list of users who have subscribed (checkbox ON) and send them daily newsletter. How can I do this in drupal-6. (1) to get list of all subscribed users (2) Send them Email.
If you can explain at code level, I 'll really appreciate that.

Answer 1

If your profile field is profile_newsletter, your :
<?php
function mymodule_get_subscribers() {
$query = 'select * from {profile_fields} where `name`="%s";';
$result = db_query($query,'profile_newsletter');
$field = db_fetch_object($result);
$user_query = 'select * from {profile_values} where `fid`=%d and `value`=1;';
$result = db_query($user_query,$field->fid);
$subscribers = array();
while($subscriber = db_fetch_object($result)) {
$subscribers[] = $subscriber->uid;
}
return $subscribers; // Your array of subscriber user IDs
}
?>
This code was quick, is untested and should probably contain a few sanity-checks. But it should work.
For the sending of newsletters and such I'd recommend using a pre-rolled module. I haven't tried any for Drupal, but Simplenews seems to do the trick. http://drupal.org/project/simplenews
If nothing else it probably contains a good sending-function. Otherwise just use PHP mail()-function.

Answer 2

function your_custom_function ($user_id, "Field you want to get") {
$result = db_query("SELECT t2.value FROM profile_fields t1, profile_values t2 where
t1.title='Field you want to get' and t2.uid=".$user_id." and t1.fid=t2.fid");
$field = db_fetch_object($result);
$profile_type =$field->value;
return $profile_type;
}