I am trying to include a file in an another file, but nothing. No error. First I included my main file.
try to include absolute path of your file. Use it:
$file = ABSPATH."wp-content/plugins/your-plugin/your-file.php";
in your case:
//main thing is to use ABSPATH $file = ABSPATH."inc/onefolder/anotherfolder/secondaryfile.php"; require( $file ); // use include if you want.
Hope it will help.
$file = ABSPATH."wp-content/plugins/your-plugin/inc/onefolder/anotherfolder/secondaryfile.php";
Check it out, please note, you should give the exact path as written on above line. Make it clear.