How to Fix HTTP Error When Uploading Images?

  • I am using WordPress 3.4.1 on Ubuntu 12.04 using Apache and PHP 5.3.X

    When I login to the dashboard and add a new post. Then try uploading an image to set as a featured image, I get a red box with a message "HTTP Error".

    I have read about people saying to not use the flash uploader and just use the browser uploader, but when I try that, I just get a 500 Internal Server Error.

    I have tried adding AddType x-mapp-php5 .php at the top of my .htaccess file, with no luck in change.

    Disabling ALL plugins had no effect. I tried a fresh install. No luck.

    Update 10/17/2016 - If you're using custom roles or capabilities, please try using a native role/capabilities and try again.

    Things to consider checking:

    • File ownership
    • File permissions
    • .htaccess configuration
    • PHP Version 7+
    • WordPress Current Version

    If you're operating behind a proxy, be sure you have your proxy server timeouts configured correctly.

    WordPress 3.4.1 Media Upload HTTP Error

    What is the reasoning behind `AddType x-mapp-php5 .php`? That would seem to be very server specific. I would think it is more likely to break your site (ie. PHP) horribly (or _do nothing_ if you are lucky) rather than improving anything?

  • After troubleshooting with @Wyck in chat, we have narrowed to the underlying issue.

    The issue was related to my server configuration not having the proper amount of memory allocated to Apache/PHP.

    If anyone has this same problem, please try verifying that you have enough (64 MB+) server memory allocated to Apache/PHP in your server configuration settings. You can also add this to your wp-config.php file:

    define('WP_MEMORY_LIMIT', '64MB');
    

    If the above solution does not work, read the article Image/Media Uploader problems? for further troubleshooting.

    Try adding one by one or all of the following .htaccess tweaks to the .htaccess file in the root directory of your WordPress installation.

    Seriously, try one of each of the solutions below so you know which one did the trick. Don't just paste them all in your .htaccess file immediately.

    Try this line:

    AddType x-mapp-php5 .php
    

    mod_security might be causing problems. Disable it to see if that is the problem. To do this, make an .htaccess file in your wp-admin directory. Add this to it:

    <IfModule mod_security.c>
    SecFilterEngine Off
    SecFilterScanPOST Off
    </IfModule>
    

    If you're using access control based on authentication on your Webserver (often known as htpasswd, basic authentication, password protected directory or similar), WordPress is not able to handle it for Flash Uploader, Cron, and XMLRPC. Related files need to be excluded to work. Keep in mind that this might break your security considerations.

    # Exclude the file upload and WordPress CRON scripts from authentication
    <FilesMatch "(async-upload\.php|wp-cron\.php|xmlrpc\.php)$">
        Satisfy Any
        Order allow,deny
        Allow from all
        Deny from none
    </FilesMatch>
    

    One final note: some have said that if using a lesser version of PHP 5.3.X you can try disabling PHP Safe Mode.

    If you are running WordPress multi-site and are receiving HTTP errors or internal server errors, related to image uploading, please read Uploading Images to Multi-Site Causes Failure to HTTP Error) for other possible troubleshooting ideas and solutions.

    ok ... good to know ... did you read that WP tries to allocate up to 256MB of ram so this `define('WP_MEMORY_LIMIT', '64MB');`should be larger if possible.

    If you're using WP 4.1.1, the `AddType x-mapp-php5 .php` is no longer a viable solution as it forces the page to simply print the PHP code as plain text

    Or add this to your sites config file if you are using nginx: ```client_max_body_size 128m;```

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Content dated before 6/26/2020 9:53 AM