WordPress的头文件包含文件不起作用

Question

I tried to include some php files in header.php. I use the script below :-

get_template_part( 'custom/tos_functions');

However get_template_part doesn't work for me, so I use include which works fine.

include (TEMPLATEPATH . "custom/tos_functions.php");

The issue is, if I put this line in header.php, I want to use some of the functions in custom template , say profile.php. In profile.php the file is as though not being called at all. I can't get the data I need in profile.php.

Then I tried to take out the include script from header, and place it in profile.php and the data I need can be called perfectly fine. This will be an issue as there will be many custom php pages I need to create, thus every page will call the include script.

Question, why is it that the file cannot be called from header.php ? The data can only be retrieved within header.php and any custom page that calls the header, couldn't get the data from the include file.

Anyway I can fix this so that I can place the include file in the header.php?

Thank you!

Answer 1

Rather than including files in the theme template files (such as header.php ), you should include them in the theme's functions.php file.

Including them in the template files is almost always too late in the WP run for it to be useful, and it may cause unexpected results and unexpected output in your templates.

Instead, in your functions.php file, do something like so:

require_once 'custom/tos_functions.php';

Then, your API code is available where you need it, and it is in the "right" place and consistent with the "WordPress way".