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The Shortcode Callback plugin allows you to use a [callback] shortcode to execute arbitrary PHP code wherever the shortcode is used.
Usage
Execute someFunction() and insert whatever it returns with the following shortcode: 
 [callback function=”someFunction”]
Example shortcode to include a PHP file (the path is relative to WordPress’ ABSPATH), then insert the results of someFunction() where you used the shortcode: 
 [callback include=”custom/filetoinclude.php” function=”someFunction”]
Shortcode example that includes a PHP file (the path is relative to WordPress’ ABSPATH), then passes a paramter to someFunction() and returns the results where you used the shortcode: 
 [callback function=”someFunction” include=”custom/filetoinclude.php” param=”something”]
The format to call a class/method with the shortcode is exactly the same as above, except you specify the class::method in the “function” attribute of the shortcode. 
 [callback function=”someClass::someFunction” include=”custom/filetoinclude.php” param=”something”]
There is an example (with PHP code) <a href="https://wordpress.org/plugins/shortcode-callback/faq/" rel="ugc">over here</a>.

Shortcode Callback

Adds a [callback] shortcode that can trigger PHP code so you can insert custom/complex things into your pages/posts.

azurecurve

Allows users to use standard bbcode in posts and pages in place of HTML.
The following bbcodes can be used: 
Bold: [b]bold[/b] 
Italic: [i]italics[/i] 
Underline: [u]underline[/u] 
Center Text:[center]centered text[/center] 
Strike : 
Quote: 
Color: 
Font size: [size=12pt]12pt font size[/size] [size=1.2em]1.2em font size[/size] [size=12px]12px font size[/size] 
Image: [img]https://s.w.org/style/images/codeispoetry.png[/img] [img=Code is Poetry]https://s.w.org/style/images/codeispoetry.png[/img] 
URL: [url]http://development.org/[/url] [url=http://development.org/]WordPress[/url] [link]http://development.org/[/link] [link=http://development.org/]WordPress[/link] 
Ordered lists: [ol][li][/li][li][/li][/ol] 
Unordered lists: [ul][li][/li][li][/li][/ul] 
Table: [table][tr][th][/th][th][/th][/tr][tr][td][/td][td][/td][/tr][tr][td][/td][td][/td][/tr][/table] 
Code:[code]function azc_bbcode_bold($atts, $content = null) { return “”.do_shortcode($content).””; }[/code]
Allows users to use standard bbcode in posts and pages.

azurecurve BBCode

Allows users to use standard bbcode in posts and pages in place of HTML.

Shortcode Callback vs azurecurve BBCode