Hook (or other way) to find out when another plugin is activated / installed

Related Posts:

1. WooCommerce: after install hook
2. How to get post ID with hooks publish_post, new_to_publish, etc
3. Redirect to another page using contact form 7? [closed]
4. edit_user_profile and show_user_profile are not firing inside a class
5. Template filter for custom taxonomy terms
6. Add sub menu page in your plugin
7. how to change automatic placing of social plugins below content?
8. Get plugin download URL from slug
9. Modify wp_installed_email / wp_new_blog_notification
10. What exactly happens to function argument availability when using a filter?
11. Installing wordpress on a subdomain of an already existing static website
12. Combining several CSS files into one for optimization
13. the_post hook is not firing for me
14. Why do plugins often ask to add in to templates?
15. Deactivate JS Script in Plugin Shortcode
16. Create a post builder skin in a plugin
17. remove_action not removing add_action from constructor
18. Plugin Development – Functions or Hooks?
19. How to get menu location in wp_update_nav_menu hook
20. How do I add some javascript validation to the admin interface form’s onsubmit?
21. Can my hooked uninstall class function access a global var declared in main plugin file?
22. plugin generated 751 characters of unexpected output during activation
23. Flipping Book PHP Code? Any experience?
24. WordPress Plugins Don’t Automatically Update
25. Turning on output buffering in a wordpress plugin
26. Can plugin2 uninstall plugin1 at the very beginning of plugin2’s installation?
27. Hook for page Request?
28. Display Plugin Panels Outside of Admin Areas
29. What are the correct permissions so WP doesn’t ask for FTP credentials if installing plugin?
30. Are there action hooks for comments?
31. Problem installing plugin: unexpected T_STRING, expecting T_FUNCTION
32. How to remove js ui library added by default by wordpress
33. How to use template_include hook with form submission?
34. Adding Plugin Assets to Header
35. Add item to the woocommerce dashboard menu from a plugin
36. How to use the pre_option filter before a plugin loads?
37. What are admin hooks
38. How do I add $_SESSION[”] to my wordpress page?
39. To perform the requested action, WordPress needs to access your web > server
40. How to use filter to disable adding a product to wishlist?
41. Save user total active time after login in wordpress [closed]
42. WordPress: Add custom add_filter for custom functions
43. How to remove a class function from a plugin by using remove_action()?
44. Advanced WordPress plugin activation detection
45. profile_update hook doesn’t works inside a class
46. wp_loaded with static Singleton
47. WordPress unable to write files in the server
48. wp_trash_post hook – problem with page updating if using wp_die
49. How to return the values from a row where a value occurs for the first time among the rows available?
50. Function added to hook “new_to_publish” not executing – custom plugin
51. Programmatically install and activate child-theme
52. is it possible to hook every page style?
53. Comment Approve – Add custom function when comment is approved
54. Plugin: Hooking up classes that have their own hooks
55. Installing plug ins on a wordpress hosted site
56. Add action to custom Function
57. Can’t Install/Upgrade Plugins Through WordPress
58. Hook for altering the content of all wp mails
59. Unable to install plugins
60. Hook on creating a menu entry?
61. What hook can I use to modify custom post data before it is displayed on the page?
62. How to hook into action/filter call
63. Quick press publish post hook
64. Prevent plug-in scripts on a specific template?
65. using wp_footer hook in a plugin
66. Plugin Add New Installer failing
67. How to deactivate my plugin upon deactivation of NextGen
68. How to automatically activate users after registration without activation email?
69. Creating a plugin that will display text on every page
70. Hooks to run after a core upgrade?
71. Installing a Plugin ( Which is already manually uploaded )
72. Plugin Hook When New Author Added
73. Adding custom Field To The Posts Listing
74. Hook for plugin to insert into entry-meta
75. All new plugins generating 311 chars of unexpected output?
76. Why does “updated_post_meta” did not fire when uploading media other than image?
77. Build a must-use plugin that tracks when other plugins are activated or deactivated
78. Change Dashboard URL from wp-admin to wp-admin/index.php
79. Activation flow of a plugin in a multisite environment
80. Use a hook or filter, or overwrite this Gamipress function?
81. Hook from plugin doesn’t fire up from external PHP script
82. Add hook after content without formatting
83. Using Remove Action Hook in Plugin
84. WordPress Custom Hook with Class method
85. Fail on admin_enqueue_scripts when I try it to upload a CSS file to my WordPress Plugin
86. admin_post hook not firing function inside class
87. How to remove a hook written with $this?
88. Is there a hook similar to “save_post” which only fires AFTER the post is completely published?
89. update_option_{$option} not working (do function after options are saved)
90. Alternative Hook to the_content for Changing Background Color
91. Unpublished Pages Failing To Appear On Custom Path
92. add a hook of Woocommerce to a plugin but it only shows and doesn’t function properly
93. Callback hooked to post_updated firing on new posts as well
94. Randomize post (and page) IDs on generation
95. save_post hook partly firing in update post
96. My plugin runs on every single WordPress page, but I want it to run only on activation
97. The function called on the wp head hook becomes null
98. Upload WordPress Plugin from ZIP Broken – Returns Symbols Squares & question marks
99. ACF Fields are not showing up on Homepage
100. Hooking into the HTML header container