The plugin generated XXX characters of unexpected output…help?

I solved it. This line:

"if (!isset($pd_plugin_instance)) $pd_plugin_instance = new Products();"

Was causing all the error. I removed the Widget section from the plugin but forgot to remove it. After removing it, the error was gone.

Related Posts:

  1. How to change a user’s password programatically
  2. Who are the most trusted plugin developers? [closed]
  3. Get plugin_dir_url() from one level deep within plugin
  4. How to delete custom taxonomy terms in plugin’s uninstall.php?
  5. Redirect to settings page after install
  6. Notify Admins about Plugin Merge
  7. What is the correct way for a theme to support plugin UIs?
  8. How does WordPress determine the primary plugin PHP file?
  9. Adding Featured Image in Post List
  10. Why does including a file in theme’s functions.php not work?
  11. translation does not work with text_domain
  12. OEmbed from Pinterest
  13. Should I use RIPS tool to test my themes and plugins?
  14. Add Top-Level Menu that opens URL
  15. flush_rewrite_rules() not working on plugin activation
  16. Determine plugin name from within plugin_action_links filter
  17. Plugin Functionality Only for Editor and Administrator
  18. Plugin to hide admin menu (vertical menu bar)
  19. Having separate plugins and themes folder for multi-site setup
  20. action-scheduler vs wp-background-processing
  21. Many plugins making WordPress run slow by design?
  22. Do you clean up your self-written plugins’ at deactivation?
  23. How do I turn a custom post type into a plugin?
  24. Global matrix for shortcodes/content for every page
  25. How to add class in plugin only for network site?
  26. How to write a plugin to add users to a mail list
  27. Add keywords meta to index.php page
  28. Pulling data from custom plugin settings using PHP shortcode and Javascript
  29. Does WP identify plugin by plugin name or plugin_basename?
  30. AJAX search posts and pages
  31. Combine scripts from all extensions of the plugin when an extension is activated
  32. Modifying Author Link to add Author Meta in URL
  33. Force file download on plugin activation
  34. Checkbox conflict in my custom plugin admin page
  35. How to create a custom post type that contains another custom post type?
  36. How to change the name of the “edit my profile” link in the WordPress admin backend
  37. Can a Plugin Override New User Default Role Type
  38. Add action to fire when a published post is updated
  39. How to let user store a file in plugin directory but not have it get deleted on update?
  40. Great blogs site resources/tutorial for WordPress Developers? [closed]
  41. How to make multiple admin pages for one plugin?
  42. Create custom pages with a plugin
  43. Is it possible for a plugin to force reading and writing of uploaded images to a database instead of to a filesystem?
  44. Amazon.com intergration with WordPress?
  45. Change letters for day name
  46. (WordPress 5.8.3) Function.php or a plugin for better performance? [duplicate]
  47. Set Multiple Meta Values as an Array Using dispatch( ‘core/editor’ ).editPost() Call in Gutenberg/JS
  48. Elementor Custom Control: How to get input value?
  49. Minimize and Uglify WordPress Plugin Files
  50. Comment “like” problem – “users who like this” avatar linking to current user profile instead of “liker’s” profile
  51. I want to generate the pdf and save it in library?
  52. How do I make sure that my plugin only runs on article detail pages?
  53. Best way to retrieve data in custom api extended from wp-api
  54. WordPress API functions not working at AJAX functions.php call
  55. How do I show content from a plugin using the template the site is currently working with?
  56. How to check homepage contain blog post?
  57. More gentle way to hook WordPress custom url
  58. auto activate plugin when theme is active
  59. Xamp installed local wordpress not allowing to publish or install plugin
  60. Activate Plugin Automatically After Set Time
  61. Using sessions or an alternative in a plugin
  62. Correct way to expand custom WordPress plugin functions
  63. Hide content for specific users with id
  64. adding dynamic/multiple slug values in ‘option_none_value’
  65. Allow members to create groups on my site
  66. WordPress UPDATE queries on MySQL database stuck
  67. is it possible to fetch data from a remote api while admin is writing a new post?
  68. Checkbox field that add a subscription product and change prices of other products in checkout and cart page
  69. Get post content inside plugin class method
  70. Custom author page for custom role
  71. Dynamical slug on custom post type
  72. Ubermenu 3 Nav Bar Customization
  73. Storing Array of values into wordpress options
  74. Using WordPress to create a simple web app (SaaS) [closed]
  75. Where do the section input fields values are stored in database
  76. WordPress Add advertising ads befor and after content with periority [closed]
  77. View more posts of a sub-category
  78. Update Plugin Without Overwriting Custom Settings
  79. How to customize ‘recurrance’ of’ wp_schedule_event’?
  80. woocommerce blank page after clicking add to cart [closed]
  81. Create Array from data in the OPTIONS table
  82. appointment plugin doesn’t display all appointments
  83. Display_rows() and column_cb() strange behaviour
  84. WordPress plugin options need to delete after deactivate & uninstall
  85. How can I pass value to function in add_menu_page?
  86. How to show post attachment image
  87. Doing action based on input from options menu
  88. Making a Custom Post Type Publish Loop
  89. How to generate a responsive output from plugin?
  90. The plugin generated xxx characters of unexpected output during activation
  91. How to hide a piece of code from a wordpress web page?
  92. How to dispaly post informations (such as titles) in an admin plugin menu page?
  93. Someone Comment 1000 times in a Day in My WordPress Site, What Can i Do
  94. get_option returning a different value from what’s saved
  95. Create Custom Coupon Type
  96. How to provide page_template path in custom plugin using WordPress
  97. WordPress custom block: Link saved in database not retrieved when editing post
  98. Accessing Correct Database to Create REST API Endpoint
  99. Detect if user is on the specific page in WordPress
  100. A multi-section WordPress store [closed]
error code: 523