get_current_user_id() returns 0 in external PHP page in plugin directory

get_current_user_id() returns 0 in external PHP page

Sorry… I posted the original in the plugins & hacks group…

I am writing a plugin that has an non WP page in it to record votes in a database table and return JSON of the vote counts. I have spent the last few hours googling and can’t seem to figure out how to get get_current_user_id() to return anything but 0 in an external PHP file

The offending code is:

define('WP_USE_THEMES', false);
require( $_SERVER['DOCUMENT_ROOT'].'/test/wp-blog-header.php' );
do_action( 'login_init' );

$user_id=get_current_user_id();
echo $user_id;

this displays 0

I tried it with:

require( $_SERVER['DOCUMENT_ROOT'].'/test/wp-load.php' );
$user_id=get_current_user_id();
echo $user_id;

and get the same result – 0.

I have a shortcode that works fine in a WP created page, but in my custom page do_shortcode( ‘[custom-shortcode]’ ); displays 0 as the $user_id.

All other WP functions appear to be working – get_site_url works and I have access to other php files in my plugin that use $wpdb and they all work…

My WP install is in the test/ directory under my main site – hence the ‘/test/’ in the require statements. The PHP file in question is in the root of the plugin directory.

There has got to be something simple I am missing – any ideas?

Full page code – (obviously there is more output than just JSON – I’m trying to get the user issue figured out…):

<?php
/*
  vote.php
*/

  define('WP_USE_THEMES', false);
  require( $_SERVER['DOCUMENT_ROOT'].'/test/wp-blog-header.php' );  //tried this with wp-load.php too

  do_action( 'login_init' );

  $_SESSION['key'] = "jkshdfkjhdsfjkhaksdfkjsahfjkdbfbudsfbvjhbvjhbrukbuhbvjkhfbvjs";  //purposely set for testing

  $post_id = $_GET['id'];                                      //get post_id (SHOULD BE FROM QUERY STRING)
  echo "post_id:{$post_id}<br>";
  $url_session = $_GET['key'];                                 //get session key from URL
  echo "url session:{$url_session}<br>";
  $session_id = $_SESSION['key'];                              //get session id
  echo "session ID:{$session_id}<br>";
  $user_id = get_current_user_id();                            //get current logged in user
  echo "user_id:{$user_id}<br>";
  $vote = $_GET['vote'];                                       //get vote from query string
  echo "vote:{$vote}<br>";
  echo "site url:" . get_site_url() . "<br>";
  echo "referrer:". $_SERVER['HTTP_REFERER'] . "<br>";

  $error = 0;                                                  //set error count to 0
  $error = ( FALSE !== get_post_status( $post_id )                      ? $error : $error + 1 );  //check to see if post exists
  echo "error after post status check:{$error}<br>";
  $error = ( $user_id != 0                                              ? $error : $error + 1 );  //check to see if user logged in
  echo "error after userid check:{$error}<br>";
  $error = ( $url_session == $session_id                                ? $error : $error + 1 );  //check to see if session is valid
  echo "error after session check:{$error}<br>";
  $error = ( strpos("read_it,skip_it", $vote ) !== false                ? $error : $error + 1 );  //check to see if the vote is valid
  echo "error after vote type check:{$error}<br>";
  $error = ( FALSE !== strpos($_SERVER['HTTP_REFERER'], get_site_url()) ? $error : $error + 1 );  //check to url referrer
  echo "error after referrer check:{$error}<br>";

  if($error == 0){  //if all validity checks pass
    $votes = record_postvotes($user_id, $post_id, 'skip_it');   //submit the vote and get return values
    $output = "{\"votes\":[{\"ReadIt\":{$votes[0]['read_it']},\"SkipIt\":{$votes[0]['skip_it']}}]}";
  } else {
    $output = '';               //otherwise, return nothing
  } //end error check

  echo $output;

?>