wp_send_json_error()
Function: Sends a JSON response back to an Ajax request, indicating failure.
Source: wp-includes/functions.php:4505
wp_check_jsonp_callback()
Function: Checks that a JSONP callback is a valid JavaScript callback name.
Source: wp-includes/functions.php:4541
_xmlrpc_wp_die_handler()
Function: Kills WordPress execution and displays XML response with an error message.
Source: wp-includes/functions.php:4097
wp_check_filetype()
Function: Retrieves the file type from the file name.
Source: wp-includes/functions.php:3027
wp_check_filetype_and_ext()
Function: Attempts to determine the real file type of a file.
Source: wp-includes/functions.php:3071
wp_get_image_mime()
Function: Returns the real mime type of an image file.
Source: wp-includes/functions.php:3273
wp_get_mime_types()
Function: Retrieves the list of mime types and file extensions.
Source: wp-includes/functions.php:3360
wp_get_ext_types()
Function: Retrieves the list of common file extensions and their types.
Source: wp-includes/functions.php:3490
get_allowed_mime_types()
Function: Retrieves the list of allowed mime types and file extensions.
Source: wp-includes/functions.php:3564
wp_nonce_ays()
Function: Displays “Are You Sure” message to confirm the action being taken.
Source: wp-includes/functions.php:3597