WordPress – headers already sent error

admin — Fri, 13 Mar 2009 18:48:21 +0000

Annoying problem sometimes encountered when installing WordPress software and running the installation routine:

"Warning: Cannot modify header information - headers already sent by (output started at…"

Means there is a blank line at the start or end of a php file but this is highly unlikely with a fresh WordPress install. So I think your files were corrupted when uploaded to the server. Try uploading them all again – filezilla always seems to work well.

WordPress blog posts – pre 1970

admin — Tue, 01 Apr 2008 11:09:39 +0000

Bloggers date stamping posts prior to 1970 will encounter an error using WordPress as the script processes dates in Unix format. The solution is found here and works well:

http://wordpress.org/support/topic/27367?replies=23#post-194153

Using wordpress through a proxy server

admin — Mon, 18 Feb 2008 10:37:13 +0000

Where the web server hosting the WordPress site is located behind a proxy server, the WordPress admin and user may experience technical problems. Symptoms include:

- very slow loading of the dashboard
- askimet not working

These can be resolved by first setting proxy credentials in wp-includes/class-snoopy.php and then editing the akismet_http_post function in wp-content/plugins/askimet/askimet.php along the lines suggested at:

http://comox.textdrive.com/pipermail/wp-trac/2006-August/003435.html

Where your proxy server requires authentication you will need to provide this in askimet.php using the line:

$http_request .= 'Proxy-Authorization: ' . 'Basic ' . base64_encode _
('username:password')."\r\n";

remembering to substitute in your actual username and password.

The new akismet_http_post function should therefore be:


function akismet_http_post($request, $host, $path, $port = 80) { _
 global $wp_version;

// $http_request  = "POST $path HTTP/1.0\r\n";
// $http_request .= "Host: $host\r\n";
 $http_request  = "POST http://$host$path HTTP/1.0\r\n";
 $http_request .= "Host: http://$host\r\n";

$http_request .= "Content-Type: application/x-www-form-urlencoded; _
charset=" . get_option('blog_charset') . "\r\n";
 $http_request .= "Content-Length: " . strlen($request) . "\r\n";
$http_request .= 'Proxy-Authorization: ' . 'Basic ' . base64_encode_
 'username:password')."\r\n";

 $http_request .= "User-Agent: WordPress/$wp_version | Akismet/2.0\r\n";
 $http_request .= "\r\n";
 $http_request .= $request;

 $response = '';
// if( false != ( $fs = @fsockopen($host, $port, $errno, $errstr, 10) ) ) {
 if( false !== ( $fs = @fsockopen('your_proxy_address', your_proxy_port, _
$errno, $errstr, 10) ) ) {

  fwrite($fs, $http_request);

  while ( !feof($fs) )
   $response .= fgets($fs, 1160); // One TCP-IP packet
  fclose($fs);
  $response = explode("\r\n\r\n", $response, 2);
 }
 return $response;
}

Dr Alan Howard » Wordpress

WordPress – headers already sent error

WordPress blog posts – pre 1970

Using wordpress through a proxy server