I'm creating a plugin. I'm receiving the following error (WP 3.5):

Fatal error: Call to undefined function wp_set_password() in \path\to\plugin.php on line 18

Line 18 consists of simply:

wp_set_password( 'newpass', $user_id );

This is located in the main plugin file, and all other code has been commented out in order to try and seclude this error. I have no idea why it's showing up as undefined.

Am I missing something here?: http://codex.wordpress.org/Function_Reference/wp_set_password


  • what action do you call this on?
    – Milo
    Commented Jan 12, 2013 at 1:39
  • I'm not calling it through an action. I originally had it placed inside of a function, but I received the error. So I placed it in the file all by itself and am still receiving the error. I've even manually defined the function (code here: wpseek.com/wp_set_password), but then I receive an error stating that wp_hash_password is undefined.
    – wesf90
    Commented Jan 12, 2013 at 1:44
  • see my answer below
    – Milo
    Commented Jan 12, 2013 at 1:48

1 Answer 1


When your plugin loads, pluggable functions aren't loaded yet, in fact a lot of stuff is not loaded yet, this what actions are for. Hook your function to an action, like plugins_loaded or init, when the WP environment is loaded and initialized:

add_action( 'init', 'wpa80246_init' );

function wpa80246_init(){
    wp_set_password( 'newpass', $user_id );
  • Makes sense now. That had crossed my mind, but I couldn't find anything to back the thought up online. Now that I know the entire pluggable file is not loaded until init, it should help with a lot of future problems as well :) Thanks
    – wesf90
    Commented Jan 12, 2013 at 1:56

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