How can a WordPress page incorporate a function that needs to be created and called?

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To incorporate a function into a WordPress page, follow these steps:

1. Open your WordPress editor and go to the page where you want to incorporate the function.
2. Click on the "Text" tab at the top of the editor to switch to the HTML mode.
3. Write the function in the HTML code of the page.
4. Save the changes and publish the page.

To call the function on the page, you need to add a shortcode to the content of the page. You can use the "add_shortcode" function in your theme's functions.php file to create the shortcode.

For example, if your function is called "my_function," you can create a shortcode like this:

addshortcode( 'myshortcode', 'my_function' );

You can then add the shortcode [my_shortcode] to the content of the page where you want to display the function.

When the page is loaded, the shortcode will be replaced by the output of the function.