What steps can be taken to troubleshoot the disappearance of a counter code when included through PHP include in different web pages?

The issue of a counter code disappearing when included through PHP include in different web pages can be solved by ensuring that the counter code is correctly placed within the included file and that the file path is specified correctly in the include statement.

// Make sure the counter code is placed within the included file
// Verify that the file path is correct in the include statement

include 'path/to/counter_code.php';