Why PHP Error: Call to a member function set_prefix() on a non-object

Posted by Rebol Tutorial on Stack Overflow See other posts from Stack Overflow or by Rebol Tutorial
Published on 2010-05-29T20:03:09Z Indexed on 2010/05/29 20:12 UTC
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I got this error

Fatal error: Call to a member function set_prefix() on a non-object in /home/reboltutorial/reboltutorial.com/wp-settings.php on line 254

line 254 contains:

$prefix = $wpdb->set_prefix($table_prefix); // set up global tables

This occurs if I try to call index_wordpress() instead of calling these two lines

    define('WP_USE_THEMES', true);  
    require('./wp-blog-header.php');  

so this doesn't work:

<?php

    function index_wordpress() {
        define('WP_USE_THEMES', true);  
        require('./wp-blog-header.php');  
    }
?>    

<?php

    if(!function_exists('apache_request_headers')) {
        function apache_request_headers() {
            $headers = array();
            foreach($_SERVER as $key => $value) {
                if(substr($key, 0, 5) == 'HTTP_') {
                    $headers[str_replace(' ', '-', ucwords(str_replace('_', ' ', strtolower(substr($key, 5)))))] = $value;
                }
            }
            return $headers;
        }
    }

    function getCurrentPageUrl() {
     $pageURL = 'http';
     if ($_SERVER["HTTPS"] == "on") {$pageURL .= "s";}
     $pageURL .= "://";
     if ($_SERVER["SERVER_PORT"] != "80") {
      $pageURL .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
     } else {
      $pageURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
     }
     return $pageURL;
    }    

    $a =  apache_request_headers();

    $pos = strrpos($a["User-Agent"], "REBOL");
    if ($pos === false) {
        index_wordpress();
    } else {

      if ($_SERVER['REMOTE_ADDR'] != "69.163.203.14") {
        $command= './cgi-bin/index.cgi '. '"' . getCurrentPageUrl() . '"';
        echo system($command);
      } else {
        index_wordpress(); 
      }
    }
?>

while this works:

<?php

    if(!function_exists('apache_request_headers')) {
        function apache_request_headers() {
            $headers = array();
            foreach($_SERVER as $key => $value) {
                if(substr($key, 0, 5) == 'HTTP_') {
                    $headers[str_replace(' ', '-', ucwords(str_replace('_', ' ', strtolower(substr($key, 5)))))] = $value;
                }
            }
            return $headers;
        }
    }

    function getCurrentPageUrl() {
     $pageURL = 'http';
     if ($_SERVER["HTTPS"] == "on") {$pageURL .= "s";}
     $pageURL .= "://";
     if ($_SERVER["SERVER_PORT"] != "80") {
      $pageURL .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
     } else {
      $pageURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
     }
     return $pageURL;
    }    

    $a =  apache_request_headers();

    $pos = strrpos($a["User-Agent"], "REBOL");
    if ($pos === false) {
        define('WP_USE_THEMES', true);  
        require('./wp-blog-header.php');
    } else {

      if ($_SERVER['REMOTE_ADDR'] != "69.163.203.14") {
        $command= './cgi-bin/index.cgi '. '"' . getCurrentPageUrl() . '"';
        echo system($command);
      } else {
        define('WP_USE_THEMES', true);  
        require('./wp-blog-header.php'); 
      }
    }
?>

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