ReorMadrid

To use it, you must use the [code] shortcode like this:
PHP Code Example:
[easycode] 
< ? php 
e cho “Hi, world!”; 
 ? > 
[/easycode]
In the admin menu, you have options to change the background colors, button colors, language and more.

Easy Code Highlighter

Displays code with syntax highlighting using Prism.js, real line numbering, and a copy button.

WP SITES

This plugin uses the Google Code Prettify Script to Highlight & Style Code
The plugin also adds styling to the existing pre Quick tag in your WordPress text editor
NO shortcodes which look bad if you stop using the plugin
All the code for this plugin comes from WordPress.org & Google
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Easy Code Highlighter vs Code Highlight