WordPress Plugin Development Cookbook - Second Edition

How to do it...

1. Navigate to the WordPress plugin directory of your development installation.
2. Create a new directory called ch5-custom-file-uploader.
3. Navigate to this directory and create a new text file called ch5-custom-file-uploader.php.
4. Open the new file in a code editor and add an appropriate header at the top of the plugin file, naming the plugin Chapter 5 - Custom File Uploader.
5. Add the following line of code to register a function that will be executed when WordPress is rendering the HTML code at the beginning of the post editor form:

add_action( 'post_edit_form_tag', 'ch5_cfu_form_add_enctype' ); 

6. Add the following code section to provide an implementation for the ch5_cfu_form_add_enctype function:

function ch5_cfu_form_add_enctype() ...