Undefined index error on options array element?

just to be on the safe side use:

if (array_key_exists('no_cat_base', $myoptions) && isset($myoptions['no_cat_base'])){
//do your thing
}

Related Posts:

  1. WP_DEBUG is not set, but I’m still getting warnings
  2. What is the best way to monitor PHP functions/executions?
  3. How do I set up Debugging?
  4. add_sub_menu page() to be replaced by add_theme_page()
  5. How to show the error causing the ‘There has been a critical error on your website’?
  6. Wordpres debug.log PHP Notice: is_singular was called
  7. How do you change error reporting to only show errors in WordPress?
  8. Unnessary character on post after restore
  9. Fatal error trace not shown in development setup
  10. How to display admin error notice if settings saved succesfully?
  11. Uncaught ReferenceError:switchEditors is not defined
  12. Prevent notice and warnings in error_reporting?
  13. strange characters in wordpress website displayed for visitors [closed]
  14. How to fix ob_end_flush() error?
  15. wp_remote_get() not retrieving pages properly
  16. $wpdb->insert Database Error Duplicate Entry Error Logging
  17. WordPress Errors in generated by theme check plugin [closed]
  18. Handling duplicates with wp_insert_term()
  19. How can I create a custom page for this error?
  20. List Category Posts plugin upgrade fails with fatal error
  21. How to get a Custom 500 Error Page to show?
  22. How can I find the cause of theme crashing Apache in Xampplite?
  23. tb_show is not defined in advance custom field
  24. Warning: in_array() expects parameter 2 to be array, null given
  25. Call to undefined function
  26. “There doesn’t seem to be a wp-config.php file.” despite wp-config.php in root
  27. White screen across whole of site including wp-admin
  28. Error Establishing a Database Connection, but credentials are OK
  29. Unable to Upload Files
  30. call_user_func_array() error on front end
  31. How we store error/success messages to the next page
  32. Out of Memory when Uploading an Image
  33. error: An Unexpected HTTP Error occurred during the API request
  34. What might cause “junk after document element” error?
  35. WordPress There is an error log for a transaction we did not do
  36. How to Debug WordPress
  37. getting error on localhost Warning: preg_match(): Null byte in regex in C:\xampp\htdocs\pamper\wp-includes\functions.php on line 5233 [closed]
  38. How do iterate through all errors for a WP_Error object?
  39. is_wp_error is missing error
  40. WordPress: Notice:Object of class WP_Query could not be converted to int in on line
  41. “Undefined index” error when saving empty array with checkboxes
  42. 500 error after update
  43. Problem with running javascript in a shortcode
  44. Accessing my site using wp-admin does not load
  45. Without access to the FTP, how can I fix the index page?
  46. How to catch all PHP errors with custom error handler?
  47. Trying to get property of non-object error with thumbnail
  48. I have an error message coming up after I type in my domain. How Do I get my site back
  49. Warning: spl_autoload() [function.spl-autoload] (Term Menu Order)
  50. Blog automatically redirected to error page
  51. Error establishing a database connection error on a site that was working fine previously
  52. 500 error for all pages and post after move localhost to server
  53. why would ABSPATH not get defined
  54. 404 Not found error after update to WordPress 5.0
  55. Keep getting this code reparted again and again?
  56. WordPress code problem [closed]
  57. WordPress fonts need to upload with Google fonts?
  58. Method Not Implemented GET to wp-admin/post.php not supported
  59. When sorting WP_List_Table, table sorts, but I also get SQL errors
  60. 403 Forbidden error nginx
  61. ‘Invalid Error’ when saving theme options – only in Google Chrome
  62. Fatal error, is this because of host?
  63. Of thumbnails and folder permissions
  64. What are the issues using the Test Cookie Fix?
  65. When trying to access home page, WordPress appends /wordpress to domain name which gives 404 error
  66. Getting an error on a new website
  67. Fatal error: Uncaught Error: Maximum function nesting level of ‘5000’ reached
  68. Fatal error: Uncaught Error: Call to undefined function add_action()
  69. call_user_func_array() error on my blog
  70. Cannot update WordPress Core via admin dashboard
  71. When writing a new blog post error message ‘ sorry, you are not allowed to edit this page ‘
  72. Error Warning: Invalid argument supplied for foreach()
  73. 404 Not Found Error showing when I run wordpress
  74. Gtmetrix: avoid bad requests
  75. Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘add_custom_scripts’ not found or invalid function name
  76. CSS and JS not loading after uploading onto server
  77. D_FILE already defined in /home/staneppsjr/public_html/wp-config.php on line 82
  78. Header already sent, error shows core files
  79. : this page isn’t working. is unable to handle the request. Http error 500
  80. admin page error
  81. Theme unit test error
  82. Installation problem with wordpress xampp
  83. BuddyPress: bp-core-template-loader.php error blocking access to wp-admin
  84. 403 Forbidden on site logo image upload
  85. Undefined index action Cannot modify header
  86. TOO MANY REDIRECTS ERROR when redirecting buddypress register page to WordPress sign up
  87. wp_list _table You do not have sufficient permissions to access this page error
  88. Dashboard doesn’t work propertly
  89. How to fix 502 errors on my WordPress site hosted on Windows Azure that only occur when I update a post?
  90. Error establishing a database connection in godaddy.com
  91. Where can I get a full list of wordpress errors in plain text?
  92. WordPress doesn’t recognise my email address and I’m missing the wp-config file in PHPmyadmin cPanel to make alterations
  93. Parse error: syntax error, unexpected ‘$q74ed’ (T_VARIABLE)
  94. Fixing this error “A description for this result is not available because of this site’s robots.txt”
  95. Fatal error: Call to a member function update() on a non-object in my resturant plugin file restaurants.php
  96. Better error messages upon critical errors – HTTP Error 500
  97. Getting 403 Forbidden Error while trying to edit or delete new posts or existing posts
  98. Creating a function inside a custom WordPress Plugin [closed]
  99. Apache error log lots of connection_refused
  100. Critical error after updating my wordpress
error code: 523