You can explore this https://gist.github.com/jbuchbinder/7419000
https://github.com/WordPress/WordPress/blob/master/wp-includes/deprecated.php
Deprecated functions: https://codex.wordpress.org/Category:Deprecated_Functions
Related Posts:
- Deprecating functions in a plugin class
- What is the best way to handle deprecated functions?
- How to replace bloginfo(template_url)
- _deprecated_argument for constants
- Debug messages refer to /wp-includes/functions.php
- How long does a deprecated function live in core?
- How to deprecate a function used in a plugin?
- Automating deprecated call checks?
- How can I see a list of pages and post where my custom Gutenberg block is used?
- Warning/Notice about functions.php
- Use ‘add_theme_support’ instead of ‘add_custom_image_header’ In WordPress 3.4
- How to debug WordPress correctly?
- Can I check plugins and themes for PHP 5.6 ahead of global PHP server Update
- How a deprecated function can crash WordPress site while upgrading
- media_buttons_context is deprecated
- Deprecated: mysql_connect():
- Mute Debug Messages from Plugins
- Deprecated issue in WordPress [closed]
- wp_customize_image_control deprecated add_tab alternative
- Display only author posts in dashboard all posts panel
- Replacing a deprecated filter ‘woocommerce_get_price’ with ‘woocommerce_product_get_price’
- Pass parameter to hooked function using custom page template
- wp_get_theme Warning: Illegal offset type
- Deprecated function get_user_by_email($email)
- Is it safe to update from 2.6.2 to the newest version?
- WordPress core code contains things marked as deprecated by… WordPress?
- wp_create_category deprecated?
- I changed .live() to .on() but change is not reflected on the server
- Overwrote index.php. When I restored it, I got lots of Notice level errors
- wp_get_http has been deprecated. Use WP_Http instead
- Is this hook really deprecated? ( manage_{$taxonomy}_custom_column )
- How to receive notification of deprecated API elements and functions?
- WordPress 6.0 upgrade caused my custom function to stop working
- Replace deprecated get_category_children code with get_terms
- Update Code to be Compatible with WP 5.3 (‘cannot modify header information’ warning)
- Is there any harm in using RSS.php (or other deprecated features)?
- Where to find new class reference or function of deprecated one?
- Undefined index: debuging error for theme option template snippet
- Your PHP installation appears to be missing the MySQL … After deleting and restarting from cpanel
- Call to undefined function _deprecated_file() in class-smtp.php
- WordPress 6.1.1 shows deprecated errors with PHP 8.1 & 8.2
- WordPress Throwing Deprecated Errors on its own Files