Php file that doesn’t recognize wordpress functions

It doesn’t recognize WP, because as far as PHP is concerned it’s not. It’s just a PHP file that happens to be in one of the folders related to WordPress.

You need to explicitly include WordPress core into it to have access to its functionality. However such custom handlers are notoriously fragile.

It would be much more reliable to create endpoint by means of WordPress functionality. See Rewrite API and around in Codex.

Related Posts:

  1. How to set and use global variables? Or why not to use them at all
  2. Contact form redirecting to page not found on send
  3. WordPress Theme variables scope
  4. Does an activated plugin automatically mean its methods are available to other WP functions?
  5. Where to get information about array fields in $_REQUEST?
  6. Custom plugin: Trying to show saved data on frontend
  7. How to call a function only once (global variable scope)
  8. How to export/import theme customizer settings?
  9. Create a global variable for use in all templates
  10. Site Title and Tagline in Theme Options Page
  11. reason of splitting theme files to multiple files
  12. Editor role cannot save custom theme options
  13. wp_customize_image_control default value
  14. Site Title and Tagline in Pagelines DMS Options Panel
  15. Filter the blog title displayed in the header
  16. How to override .htaccess with new rules without ftp or edit it manual
  17. How can one utilize a variable as a callback function name for add_settings_field
  18. JavaScript, best way to use data from the loop
  19. After upgrading to PHP 7.0 my contact form outputs error
  20. theme options echoing multiple times
  21. Theme Options: If There is No Input, Don’t Display?
  22. Displaying theme options in css
  23. max_input_vars: how many am I using?
  24. Putting PHP variables into javascript [duplicate]
  25. Choose To Display Post Views With An Options Panel
  26. Get Admin Email Address From External PHP page
  27. Set WordPress Default Template
  28. Call External Object in Class Function During Callback
  29. Set the checkbox as checked by default at options page
  30. Customizer – Prefix Class Extension
  31. Call global variable array() in woocommerce child/template
  32. Theme Options Page – User Updates Logo
  33. Selectbox in admin panel function linking to CSS
  34. Using if/else statements with output from theme options
  35. How to prevent XSS alter custom global javascript object & methods in WordPress
  36. WP Post-Thumbnail
  37. How to modify a global variable in a function and use it on another function?
  38. Contact form won’t submit
  39. Error: options page not found
  40. WordPress theme options error
  41. WordPress Options Page Theory Question
  42. Trying do build a contact form
  43. Warning: Illegal string offset on theme options page [closed]
  44. Changing the color scheme based on the url visited
  45. Why is an array created in a function hooked to customize register populated when customizer is loaded but not when the front-end is loaded?
  46. Link blogname and blogdescription to the Options Framework
  47. Where is this function’s callback getting its arguments from?
  48. How to add drag and drop functionalities to a div inside option panel
  49. What is the alternative code to if (isset ($_POST) && !empty ($_POST) to avoid warnings?
  50. Undefined index for default custom theme option
  51. PHP- Why is my contact form keep showing it is invalid? [closed]
  52. ‘global’ not working in wordpress?
  53. PHP if have image display image, if else text
  54. Deactivate a plugin on wp version
  55. Get value from db for custom contact form
  56. what does $options = get_option(‘test_theme’); do?
  57. Using theme options to change a border-radius value
  58. Contact form – problem with displaying message about sent mail
  59. Dynamically switch file in get_template_directory_uri() | Function [closed]
  60. Illegal string offset in PHP function in via Theme Customizer
  61. Is it secure to use SMTP password in .php file in WordPress website?
  62. global $product is empty string when passed into function
  63. Define global custom post
  64. Custom global variable not working in function
  65. Hide payment method based on user role AND minimum cart value
  66. Change CSS Variable value in Theme Customizer Live Preview
  67. How to find php variable of wordpress theme settings
  68. WordPress default contact form
  69. global $post inside plugin query messes up every new post page in wp-admin
  70. Use get_option with $emailTo on contact page
  71. wp_customize_image_control default value
  72. WordPress Setting page can not be saved by html radio
  73. WordPress $GLOBALS and PHP $GLOBALS
  74. key( $GLOBALS[‘wp_registered_sidebars’] ) is always showing the same value
  75. Not able to call class in NHP framework
  76. Category List in Theme Options Page
  77. custom contact form no longer working (because of 3.2?)
  78. How to change a specific character in a theme option value – replace a space with a plus sign
  79. Setting field not saving on front-end
  80. Select area and checkbox data is not saving?
  81. Options.php loop won’t show!
  82. Suppress errors when using global function
  83. Using global variables
  84. How can one use variables in a template or template part without polluting the global scope?
  85. Why is this specific API request failing when sending via wp_remote_post?
  86. Can’t send form data to wpdb when URL has query string
  87. XML WP_Query problem in PHP 8.0 and 8.1
  88. Dynamically added text at bottom of article – non searchable by PHP code
  89. $wpdb how to make a record lookup
  90. Add a custom user meta data on registration based on user email
  91. Error resetting database index using ALTER TABLE in $wpdb->query
  92. 500 Internal Server Error PHP 8.1 Array with wordpress
  93. why css file not link?how to create permalink?
  94. How to add different menu items on different menus?
  95. undefined variable in php
  96. functions.php doesn’t load all custom theme assets
  97. How to limit number of posts in the certain category and exclude the oldest post automatically
  98. Nav menù doesn’t display selected pages
  99. To perform the requested action, WordPress needs to access your web server
  100. Shortcode Displays 2 times
deneme bonusu veren sitelerbahis casinomakrobetceltabetpinbahispolobetpolobet girişpinbahis girişmakrobet girişpulibet girişmobilbahis girişkolaybet giriş