How are these PHP functions applied to a specific page in WordPress?

make sure that the post as a customfield named 'location' and the page you are viewing is using the_content() or if you want this to work on categories and archives then add:

add_filter('the_excerpt', 'show_popup');

hope this helps

Related Posts:

  1. Error Warning: Declaration of description_walker::start_el after PHP upgrade [duplicate]
  2. Displaying Logged-In User Name in WordPress Menu
  3. Autoloading in Child Theme
  4. Set media upload attachment link to none and hide it in WP v3.5
  5. Fatal error: Call to undefined function plugin_dir_path()
  6. Switching wp_get_sites to get_sites
  7. One button to change all settings in theme customizer?
  8. Add custom image sizes to media uploader
  9. add_rewrite_rule with bottom priority doesn’t handle the WordPress pages
  10. How to add default images into theme customizer image control?
  11. Is $hook a global variable in WordPress
  12. Successful or Error Message after running mysql code in functions.php
  13. How can one utilize a variable as a callback function name for add_settings_field
  14. Custom Logo URL | Help me print the URL of the custom logo I inserted into my theme
  15. Include a php file from functions.php only to homepage
  16. How do I fetch all comments per post via WP REST API?
  17. Shortcode content output but not in correct place
  18. How to restrict page access to logged-in users?
  19. Count the number of times the search form template gets included on a page
  20. PHP code inside shortcodes
  21. Handling Body class based on Template
  22. Adding Default Settings to Theme My Login plugin
  23. Automatically adding new post categories to menu
  24. Get post id in a function when edit/add a post
  25. function to assign user role based on a field from usermeta
  26. get author_name from queried post
  27. Is it possible to intercept all ajax requests and get the parameters and the returns?
  28. WordPress Gravatar filter is removing my custom attributes
  29. Pass php dynamic variable to shortcode
  30. Incorrect amount of posts returned when filtering related Woo products by custom taxonomy
  31. Remove echo from shortcode
  32. Copyright info change – Corporate Plus Theme PHP [closed]
  33. Inject class in body when particular page template is used
  34. How to list posts from a plugin taxonomy?
  35. wp_force_remove_style’ not found
  36. Filtering a function’ output for a new continued function
  37. Pagination on Custom Post
  38. Shortcode to find and replace URL
  39. Deleting Certain terms from appearing on the front end as links
  40. first instantiated SimplePie object cosumes 5mb?
  41. Theme not calling Jquery properly
  42. Function Reference Documenting Template Tags for use in Custom Theme Templates?
  43. WordPress redirect redirecting too many times or not at all
  44. how to save checkbox data for custom setting?
  45. How to keep the capability of users and disable Gutenberg editor in WordPress?
  46. How to make jquery count down timer function manually editable
  47. Hierarchical taxonomy list with modificated term links
  48. Add value to new attribute inside WordPress menu items
  49. Please show me how to use an if/else statement in combination with wp_enqueue
  50. If Array Values Match Another Array’s Values, Then
  51. Enqueing External JS on the remote server JS
  52. entire JS folder not loading in a WP theme
  53. Open and closed function [closed]
  54. Need to Modify a WordPress Shortcode with another wordpress shortcode
  55. Else/If Statement to Display Photo Descriptions
  56. Count foreach and display in menu php
  57. How to add aria role and schema markup to custom walker container
  58. Remove submenu item from list
  59. Display additional page templates and a sidebar on plugin activation
  60. Customize field names in backend profile edit page through function.php [duplicate]
  61. Insert content into head tag with function
  62. Restrict post to current user in postmeta
  63. How to change the author box selection on a post to a custom taxonomy
  64. Output product category link from WP_Query
  65. How to send a php var to jQuery Ajax call with two different file
  66. copy fields value to another field
  67. not outputting medium size image URL
  68. posts_per_page displays only 2 posts instead of 4 posts
  69. Get parent category name when only child category is applied to a product
  70. Best way to use variables in multiple functions?
  71. Can an AJAX callback function access a PHP variable which was defined during initial page load?
  72. Adding product permalink on admin order page throwing error
  73. Before & After Content – After Content directly below Before Content when using require_once
  74. Cannot fetch posts with certain ‘product_cat’. WP_Query is empty
  75. Access to “My Site” is missing from the admin bar
  76. How to redirect (301) trashed post to it’s parent taxonomy TERM ARCHIVE instead of 404 page
  77. Detect what link user clicks and Redirect to a specific page for logged in users only
  78. How to call WordPress PHP file using external js file
  79. How fix error in the WordPress loop?
  80. use system script advertising in wordpress multisite
  81. Use WP_Query Data In Cookie
  82. Extend the WP_Customize_Image_Control class to change its non-frame $button_labels
  83. Styling admin page rows in order of importance (checkboxes)
  84. Insert wordpress tags below posts via functions.php
  85. Help with my first Metabox helper class
  86. ISOTOPE – Missing/Invalid Arguement Get Terms
  87. Showing all post from all post type in admin backstage
  88. Pagination not displaying
  89. My title is showing after the shortcode
  90. Load a Header in wordpress
  91. Trouble figuring out how to get my button to submit comment
  92. Setting WooCommerce currency programmatically
  93. Masking external links with internal link for member-only
  94. Shortcode to include PHP file, pass various parameters to include?
  95. Why can’t I include echo inside a variable? [closed]
  96. Adding multiple conditional tags in a function?
  97. Dynamic Email Handler with ‘header (“Location: …’
  98. WooCommerce: write featured image dimensions to custom fields in product’
  99. Generate and upload screenshot as featured image for user-submitted post
  100. transition_post_status hook, works – but not if the post is new