What is WordPress Hook: upload_mimes
The upload_mimes hook in WordPress is used to modify the list of allowed file types for uploads. It allows developers to add or remove specific file types that can be uploaded to the media library.
Understanding the Hook: upload_mimes
The upload_mimes hook is located within the wp_check_filetype_and_ext function in the wp-includes/functions.php file. This function is responsible for checking the file type and extension of uploaded files and determining if they are allowed.
Hook Parameters (if applicable): upload_mimes
The upload_mimes hook accepts an array of file types and their corresponding MIME types as parameters. Developers can add or remove file types by modifying this array using the hook.
Hook Doesn’t Work: upload_mimes
If the upload_mimes hook doesn’t work as expected, it may be due to conflicts with other plugins or themes that also modify the list of allowed file types. It is recommended to deactivate other plugins and switch to a default theme to troubleshoot the issue.
Best Practices & Usage Notes (if applicable): upload_mimes
When using the upload_mimes hook, it is important to be cautious about adding new file types, especially executable file types, as they can pose security risks. It is also recommended to regularly update the list of allowed file types to ensure that it aligns with the website’s content needs.
Usage Example: upload_mimes
“`php
function custom_upload_mimes( $existing_mimes ) {
// Add SVG to the list of allowed file types
$existing_mimes[‘svg’] = ‘image/svg+xml’;
return $existing_mimes;
}
add_filter( ‘upload_mimes’, ‘custom_upload_mimes’ );
“`