Preserve Code Formatting for WordPress

This plugin preserves formatting of code for display by preventing its modification by WordPress and other plugins while also retaining whitespace.

NOTE: This plugin does NOT handle posts containing blocks. For such posts, use the built-in code or preformatted blocks to format your code for display. However, this plugin would still be needed if you have text-based posts from before using the blocks-based editor.

NOTE: Use of the visual text editor will pose problems as it can mangle your intent in terms of code tags. I strongly suggest you not use the visual editor in conjunction with this plugin as I have taken no effort to make the two compatible.

Notes:

Basically, you can just paste code into code, pre, and/or other tags you additionally specify and this plugin will:

Prevent WordPress from HTML-encoding text (i.e. single- and double-quotes will not become curly; “–” and “—” will not become en dash and em dash, respectively; “…” will not become a horizontal ellipsis, etc)

Prevent most other plugins from modifying preserved code

Prevent shortcodes from being processed

Optionally preserve whitespace (in a variety of methods)

Optionally preserve code added in comments

Keep these things in mind:

ALL embedded HTML tags and HTML entities will be rendered as text to browsers, appearing exactly as you wrote them (including any br tags).

By default this plugin filters ‘the_content’ (post content), ‘the_excerpt’ (post excerpt), and ‘get_comment_text (comment content)’.