acchiappaprezzo

There is no proof that his website was hacked. Until you see what the errors are, you’re shooting in the dark. It’s just as possible an automatic update caused one of his plugins or themes to error out.

Why would you have him lower his memory limit? Besides, WP_MEMORY_LIMIT does the exact same as using ini_set(‘memory_limit’, …

1. Install the Really Simple CAPTCHA plugin: https://www.ads-software.com/plugins/really-simple-captcha/
2. When you create a new form, add the following:

   Please enter the code that you see to the right: [captchac competition-x]
   [captchar competition-x 4/4]

Change the “competition-x” in those tags to something unique each time.

Try manually switching your theme to Twenty-Thirteen and then back to your main theme and see if that resolves the issue.

To disable automatic updates, add this line to your wp-config.php file:

define( 'AUTOMATIC_UPDATER_DISABLED', true );

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This doesn’t not appear to be a WordPress website. You will either need to learn HTML and modify the website by hand or hire a web developer, but these forums are specifically for WordPress questions and problems.

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I would recommend changing hosts, but if that’s not a possibility try adding this line to the bottom of your wp-config.php file:

ini_set('memory_limit', '1024M');

Also create a php.ini file in your root web directory with this line:

memory_limit = 1024M

You can’t change it at the server level, but you might be able to change it at the local user level. One or the other will work if your host hasn’t prevented you access to those settings.

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Do you use a captcha in your voting form? If not, it’s very simple to create a script that posts data automatically to any URI.

Contact Form 7 has captcha support, enable it if it’s not already and that should resolve the majority of the abuse.

A longer term solution would be a more robust voting system that prevents multiple entries from a single IP and heuristics to monitor abuse. Contact Form 7 really isn’t built for this type of application.

In your wp-config.php file, change:

define('WP_DEBUG', true);

to:

define('WP_DEBUG', false);

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Your website is returning a 500 status code, which means that you have a PHP error preventing your website from appearing.

Try adding this to the bottom of your wp-config.php file and then reloading the page:

error_reporting( E_ALL );
ini_set('display_errors', 1);

The PHP error(s) that are causing this problem should then appear.