This way WordPress will keep dependencies in check and you will avoid potential conflicts. WordPress already keeps track of all the scripts and CSS that it has loaded, so instead of adding your JS and CSS into a header or footer, let WordPress handle it with its enqueue functionality. The wider PHP community has created a good list of the PHP functions that intruders might use. Sometimes, you have to return to Step 1 because the encoded part might have nested encoded parts. Generally considered a bad practice, the use of eval functions can-even unintentionally-create backdoors, especially if the code passed to them comes from a POST or GET parameter. (Do you know exactly what that code does?) The eval functions in both PHP and JavaScript run code given to them as parameters. The above examples also show that any uses of functions that allow running bash scripts (such as shell_exec, system, and exec) or access the file system should be suspicious. To add headers in WordPress, developers can use the send_headers hook by adding the code below to the function.php of a given theme: add_action( 'send_headers', 'add_csp_headers' ) function add_csp_headers() f')' The Solutionīy adding the right HTTP headers, you can be sure that only scripts from a whitelist will be loaded and run on a page.

The ProblemĪn intruder might add to a page through SQL injection (or another vulnerability) some scripts (or external script files) with malicious code. It allows setting an HTTP header that whitelists resources that scripts are allowed to be loaded from. You may also be interested in How to Approach Modern WordPress Development to get up to speed with the latest techniques.Ĭontent-Security-Policy is a security standard that has been widely adopted by web browsers since 2015. This is a community-driven project, so you are encouraged to contribute as well, and we are counting on your feedback.Ĭheck out the Toptal resource pages for additional information on WordPress development there is a WordPress developer hiring guide and WordPress developer interview questions. It now also includes steps to help WordPress site administrators avoid installing malicious scripts alongside WordPress themes. This resource contains a collection of WordPress development best practices and WordPress development tips provided by our Toptal network members. The themes then contain malicious scripts that can steal site traffic or even users’ personal or payment data.

For instance, intruders often create visually attractive themes and distribute them for free. The popularity of WordPress-especially among non-programmers-also makes it a target, so security practices are crucial. Anyone without any special programming knowledge can build a website, but a working knowledge of WordPress intricacies is a boon to any developer or designer resume. The power of WordPress is in the ecosystem-there are a lot of different plugins and themes. 99 might be overkill but if we ever need to add something between the two we have ample ‘room’ to do so.WordPress is a content management system that powers 34% of all websites on the internet and 60% of websites that run on CMS. That represents the priority, or order files will be loaded. Then we make a second add_action call to enqueue style.css, Note the trailing 99 in the add_action. '/js/') Īdd_action( ‘wp_enqueue_scripts’, ‘mytheme_scripts’ ) Wp_enqueue_script('uikit_icons', get_template_directory_uri(). Wp_enqueue_script('uikit', get_template_directory_uri(). Wp_enqueue_style('uikit', get_template_directory_uri().

First we load up UI Kit’s CSS and javascript files: So, we need to do two calls for the enqueueing. My concern was, UI Kit has a lot of default styles that I was intending to over-ride in my style.css file, so it was important that style.css get loaded last. I’m honestly not convinced this is necessary for a theme you’re building for a specific site but what the heck.

I was trying to be a good WordPress citizen and so was enqueueing both UI Kit’s CSS and my main CSS. I was working on a WordPress theme and I wanted to incorporate UI Kit into this theme. Another in a long line of stuff that is easy to do once you find out how to do it.

Wordpress enqueue style