What are the potential pitfalls of using echo for debug outputs in PHP scripts?

Using echo for debug outputs in PHP scripts can clutter the actual output of the script and make it difficult to read, especially in larger scripts. It can also accidentally expose sensitive information if not properly sanitized. To solve this issue, it is recommended to use PHP's built-in function error_log() instead, which writes to the server's error log file without disrupting the actual output.

// Using error_log() for debug outputs
error_log("Debug message goes here");