Warning: array_pop() expects parameter 1 to be array, boolean given

get_the_terms() will return a boolean false under some circumstances:

A post with no terms assigned gives a false result, not an empty
array.

https://codex.wordpress.org/Function_Reference/get_the_terms#Returns

It sounds like that is what is happening. You need to check that $post_link = to ensure that it is the type you expect before trying to use it.

Related Posts:

  1. Error Warning: Declaration of description_walker::start_el after PHP upgrade [duplicate]
  2. Illegal string offset in PHP function
  3. How to fix this warning:call_user_func_array() expects exactly 2 parameters, 1 given in D:\wamp\www\…….\wp-includes\class-wp-hook.php on line 286
  4. Warning: Illegal string offset ‘post’ and ‘page’
  5. Allowed memory size of 268435456 bytes exhausted (tried to allocate 7146491840906359738 bytes)
  6. Customize default settings on new sites on multisite
  7. How do I get the author’s page url from their ID?
  8. Calculate percentage of post by category
  9. Remove class that has been added by parent theme
  10. How to check from which page the user is coming to the current page?
  11. Design view breaking on Pages
  12. Execute only on a certain page
  13. How do I know what variables are passed in a filter/action and what their meaning is?
  14. “Can’t use function return value in write context” error
  15. Wrap each shortcode in array to div
  16. Change links automatically to affiliate links
  17. How to make thumbnail image fit into a div where image dimentions are completely different?
  18. Add before_content and after_content to register_sidebar
  19. How to access function from outside of a class within this class in WP plugin?
  20. Placing raw HTML inside a WordPress shortcode
  21. Word Count Function Preventing Permalink Editing
  22. Using file_get_contents with Gravity Forms uploads folder to create images in the media library returning false
  23. Replace word in “the_content” only for index.php
  24. Changing custom logo link
  25. Add a variable in functions.php and call it in single.php
  26. How does WordPress insert Paragraphs in posts
  27. Linking text within textarea of custom meta box
  28. what is the best practice to add new field to an api route
  29. Auto-update products after they were published – Woocommerce
  30. Title Case WordPress Menu Items
  31. php function to display commenter username or login
  32. How to change menu order item
  33. responsive.css in the WordPress should be prioritized
  34. Alter required message using comment form api
  35. How to get Post Type from the functions.php file
  36. How to display login form anywhere, when user isn’t logged in, without redirecting?
  37. Edit the_category (); for a hierarchical display
  38. Omit custom post type from wp-sitemap.xml based on meta key using wp_sitemaps_posts_query_args
  39. Multiple meta_key in one global $wpdb;
  40. Using data sent via AJAX in multiple functions on a WP plugin
  41. Utilize Function in Child Theme / Template File
  42. HTML Special Characters in URL string [closed]
  43. Create page template via functions.php?
  44. Send a mail to specific address in a custom field when a new comment is made on a specific post
  45. How to have different site identity logos on each page on Astra Theme [closed]
  46. CSS change in woo commerce Place Order Text [closed]
  47. Overide Variable in Child Theme
  48. child parent styles enqueue order
  49. Add URL parameter to all internal links using a specific theme
  50. Warning: call_user_func() expects parameter 1 to be a valid callback, function
  51. Change MySQL PDO connection to a WPDB connection
  52. Randomize Color Scheme Selection in Theme
  53. Cannot modify header information – server cache
  54. Hide a div when a custom field is empty
  55. AJAX function not working [closed]
  56. Modify WooCommerce used to get all orders in dashboard
  57. Can’t log in to WordPress wp-admin after adding code to functions.php
  58. How to change basename url for wp-admin?
  59. display condition based on post term and status
  60. Only the first image uploads
  61. Search by date in WordPress
  62. Hide a div if the fiels is empty
  63. Illegal string offset checkbox
  64. removing the standard dashboard widgets in WP so I Can replace with custom
  65. Gravity Forms: How to add PHP function to confirmation conditional shortcode?
  66. wpdb->query returns different value to phpMyAdmin
  67. Trying to add some custom text into WordPress Post title via function.php
  68. How to change order inside foreach using wp_enqueue_script?
  69. Change header on one page in WordPress
  70. I got big white screen when i attach main style sheet of Html in functions.php
  71. Using Javascript On Page – Header and Footer Now Missing
  72. Adding extra data to shortcode attributes and pass it to JS with wp_localize_script
  73. Add Product Permalink in woocommerce admin order page
  74. Unzip_file causing Media file upload error
  75. Allow Comments by Default for Multiple Post Types
  76. Cleaner ‘for each’ loop for registering scripts in functions.php
  77. How do I make comment-reply-button with that takes to comment reply form on click
  78. How to get User Avatar Image with link to Author and User name in Html Title tag?
  79. How to generate customized filtered output for the gallery
  80. How to get all users by user_login as a json_encode array?
  81. Escaping a Single Quote in str_replace for Nav Function
  82. Allow BBPress participant role to trash topics
  83. Display Year and Month from custom field + Age Calculator
  84. insert thumbnail image from php script
  85. WordPress rating by views [closed]
  86. Get author meta of all writers
  87. Trying to see if page is category or single and displaying title with appropriate heading tag
  88. WordPress causing all code to be displayed on line 1. Receiving multiple errors after cleaning cookies and cache
  89. Hide the content before the more tag in the “single page”
  90. Replace TinyMCE with Custom Built Editor
  91. Particular meta tag – viewport – insertion when dealing with plugin
  92. how to loop through blog posts in php
  93. WP Fatal error: Call to undefined function get_template_directory_uri()
  94. Remove default Image Sizes
  95. A better way to write this php function
  96. WooCommerce: write featured image dimensions to custom fields in product’
  97. Generate and upload screenshot as featured image for user-submitted post
  98. a problem in class in class-wp-hook.php
  99. transition_post_status hook, works – but not if the post is new
  100. change title of page dynamically