Title: array_unique() expects parameter 1 to be array
Last modified: August 21, 2016

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# array_unique() expects parameter 1 to be array

 *  Resolved [Spekkio](https://wordpress.org/support/users/spekkio/)
 * (@spekkio)
 * [12 years, 8 months ago](https://wordpress.org/support/topic/array_unique-expects-parameter-1-to-be-array/)
 * I was not recieveing email when users registered.
 * array_unique() under request_admin_approval_email() in new-user-approve.php returned
   NULL, because only one string was passed, like this array_unique( $to ), where
   $to = “admin@foo.bar”
 * I just replaced this
 * $to = array_unique($to);
 * with this
    $to = array($to);
 * Maybe just this should be done before $to = array_unique($to); so that it wont
   send out duplicate emails in case there are many email to send out to, but I 
   have not tried that yet.
 * [http://wordpress.org/plugins/new-user-approve/](http://wordpress.org/plugins/new-user-approve/)

Viewing 1 replies (of 1 total)

 *  [Josh Harrison](https://wordpress.org/support/users/picklewagon/)
 * (@picklewagon)
 * [12 years, 8 months ago](https://wordpress.org/support/topic/array_unique-expects-parameter-1-to-be-array/#post-4200946)
 * This has been fixed in version 1.5.4.

Viewing 1 replies (of 1 total)

The topic ‘array_unique() expects parameter 1 to be array’ is closed to new replies.

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 * 1 reply
 * 2 participants
 * Last reply from: [Josh Harrison](https://wordpress.org/support/users/picklewagon/)
 * Last activity: [12 years, 8 months ago](https://wordpress.org/support/topic/array_unique-expects-parameter-1-to-be-array/#post-4200946)
 * Status: resolved