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How can i check if user is logged in for the first time on site?

If it is, i want to show him a message...

Can someone help me?

Thank you!

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4

** UPDATE **

As suggested by oknate, using hook_user_login:

function hook_user_login(&$edit, $account)
{
  if(!$account->access)
  {
    drupal_set_message(t('This is your first login. Welcome!'));
  }
}

** Original less optimal method **

You can use hook_init() in D7, and check if they have a value for last access:

function hook_init()
{
  global $user;

  $first_login = db_query('SELECT 1 FROM {users} WHERE uid = :uid AND access = 0', array(':uid' => $user->uid))->fetchField();

  if($first_login)
  {
    drupal_set_message(t('This is your first login. Welcome!'));
  }
}
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  • hook_init runs on every uncached page load. I would suggest finding another way. – oknate Dec 19 '16 at 23:31
  • There are ways you can minimize it - such as adding a field to the {users} table and flagging in on first login. This would be automatically loaded with the user object for every page load, not requiring the additional query shown here. But I don't see any other way you could do it without checking on every page load. Suggestions? – Jaypan Dec 19 '16 at 23:33
  • 1
    look into hook_user_login, and the $user->access flag on the user. – oknate Dec 19 '16 at 23:34
  • That's a good suggestion. – Jaypan Dec 19 '16 at 23:35
  • then $account->access, see drupal.stackexchange.com/questions/34397/… – oknate Dec 19 '16 at 23:36
3

In both Drupal 7 and 8, there is hook_user_login, where you can can check whether the current user has accessed the site before, but the parameters are slightly different.

Drupal 7 version:

function mymodule_user_login(&$edit, $account) {
  if ($account->access == 0) {
    drupal_set_message(t('This is your first login. Welcome!'));
  }
}

Drupal 8 version: 

function mymodule_user_login($account) {
  if (!$account->getLastAccessedTime()) {
    drupal_set_message(t('This is your first login. Welcome!'));
  }
}

hook_user_login in Drupal 8.

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1

For D7 you can use rules to achieve the same,

Here is the sample rule,

{ "rules_first_login_test" : {
    "LABEL" : "First login test",
    "PLUGIN" : "rule",
    "REQUIRES" : [ "rules" ],
    "USES VARIABLES" : { "user" : { "label" : "User", "type" : "user" } },
    "IF" : [ { "data_is_empty" : { "data" : [ "user:last-access" ] } } ],
    "DO" : [ { "drupal_message" : { "message" : "True" } } ]
  }
}

Import this rule and modify according to your need.

You can check the more information here.

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