TIgor4eg

Easy way to add php code. No need to edit functions.php in your theme directory. 
Just paste code in Admin menu and save. 
Code is highlighted with <a href="http://codepress.sourceforge.net/index.php" rel="nofollow ugc">codepress</a>.

Add Functions

With this plugin you can add new functions through admin menu, without editing your themes functions.php

sh1zen

Now is very easy to share code in your website with Gutenberg and the power of <a href="https://ace.c9.io/" rel="nofollow ugc">Ace</a>, an embeddable code editor written in JavaScript with the features and performance of native editors such as Sublime, Vim and TextMate.
Each instance of Coder Block support:
<ul>
<li>Different languages: html, php, css, javascript, python,…</li>
<li>Syntax highlighting with more than 10 themes to choose.</li>
<li>Other options to select the font size of the code and lines to show without scroll.</li>
<li>Code evaluation in your posts/pages.</li>
</ul>
Code evaluation
With this feature each page will evaluate the code published within the coder block. 
Up to now are supported PHP, Javascript and CSS only.
DONATIONS
This plugin is free and always will be, but if you are feeling generous and want to show your support, you can buy me a 
beer or coffee <a href="https://www.paypal.com/donate/?business=dev.sh1zen%40outlook.it&item_name=Thank+you+in+advanced+for+the+kind+donations.+You+will+sustain+me+developing+Coder+Block.&currency_code=EUR" rel="nofollow ugc">here</a>, I will really appreciate it.

Coder Block

The Coder Block plugin allows embedding php code inside of posts and pages within the new Block Editor.

Add Functions vs Coder Block