OptinMonster Documentation

Documentation, Reference Materials, and Tutorials for OptinMonster



Supported PHP Version

Supported PHP Version

If you were linked to this page from your WordPress dashboard, then it means that you’re running an outdated version of PHP.

PHP is the programming language that WordPress and OptinMonster are built on. The version that is currently used for your site is either insecure or no longer supported.

Newer versions of PHP are both faster and more secure. In fact, the version of PHP your website is using no longer receives security updates, which is why we sent you the notice.

The easiest way to resolve this issue is to contact your web hosting provider and ask them to update the PHP version on your hosting account. This actually is quite easy, and something they should be doing proactively. However if your web hosting company is unwilling to do this, then it clearly shows that they DO NOT care about your website security.

In that case, we recommend that you switch to one of the recommended WordPress hosting companies listed on WPBeginner’s article.

At OptinMonster, our favorites are Bluehost and SiteGround, both of them are officially recommended by WordPress as well. Our website is hosted with SiteGround.

In case your web hosting companies ask, below are the PHP version requirements for the OptinMonster plugin.


Although you should have your web hosting company update your PHP version 7.3 or greater, OptinMonster currently works on any PHP version 5.5 or higher (WordPress itself requires PHP 5.6+ for the latest updates).

Support for PHP 5.5 will be discontinued in 2020.

Frequently Asked Questions

Which version should I update?
You should update your PHP version to 7.3 or greater (whatever the latest version is that is offered by your web host). Most sites can upgrade to PHP 7+ without issues, which is our recommendation.

How do I update?
Web hosts have the ability to update your PHP version. In most cases you can upgrade within your web hosting control panel or by submitting a support ticket to your host.

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OptinMonster has transformed our business. Before integrating their optins, our clients saw a 2% conversion rate from web traffic, which is slightly above the standard for their industry. With the integration of OptinMonster’s lightbox popup, exit-intent technology, split testing, and other tools, our client’s conversion rates soared by an unprecedented 500%. They attracted substantially more customers while spending less on digital advertising. Their success propelled them to the top of their markets, outperforming national chains and other medical spas with much bigger marketing budgets. Our client’s success in their market has distinguished us in our own. We are now one of the most sought-after marketing firms in the industry of aesthetic medicine. We know that the integration of OptinMonster, more than any other tool or marketing strategy, has supported this growth and achievement.

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Chris Zelig

Partner, Medstar Media

OptinMonster has been a game-changer for us. From driving donations to collecting new leads, there is nothing that this simple tool has failed to accomplish. Our lead collection rate has jumped by over 1,000%.

joe lowe american bird conservancy

Joe Lowe

Director of Digital Communications, American Bird Conservancy

Through OptinMonster’s exit-intent popups, we have more than doubled our sales conversion rate. Best of all is the compound effect of using OptinMonster over a long period of time—more conversions mean more customers, which means more word of mouth.

mitch smith, managing director, shockbyte

Mitch Smith

Managing Director, Shockbyte.com