Super cache does not cache for first-time visitor

That’s strange. Any page visited should be cached. Do you have any plugins that set a cookie? Please use error_log() to debug wp-cache-phase2.php – look in wp_cache_ob_callback() first and then work your way back.

How do I use error log () to debug?

https://ie.php.net/error_log

I generally use it like this:
error_log( “blah\n”, 3, “/tmp/err.txt” );

That will print “blah” to /tmp/err.txt

You can tell I’m working quite hard at this..I attempted debugging and have no idea if I did it right. Remember that I’m not a coder. Just trying to get wp-super-cache to work. After “debugging” if I even did it right, I got this error in my browser:

Parse error: syntax error, unexpected T_GLOBAL in [“my directory”]/wp-content/plugins/wp-super-cache/wp-cache-phase2.php on line 12

This is the 12th line:

error_log( "blah\n", 3, "/tmp/err.txt" ) global $wp_cache_gzip_encoding;

Is that how I use error log() to debug?

Remember, my issue is that the super cache folder never gets created. wp-cache works just fine but the super-cache side never seems to trigger.