strpos(): Empty delimiter in /wp-content/plugins/wp-super-cache/wp-cache-phase1.php on line 576

[marcomarsala]

The warning above fills server logs. Maybe an empty variable is used as delimiter parameter to strpos call?

[donnchawp]

It looks like $WPSC_HTTP_HOST is either not set or more likely is "" which will happen if HTTP_HOST isn't set. Do you think these warnings are showing on requests made through a command line? The HOST isn't usually set for those.

Anyway, fixing it should be as simple as replacing the line with something like this. Can you try this and reply if it works?

if ( isset( $WPSC_HTTP_HOST ) == false || $WPSC_HTTP_HOST == '' || false === strpos( $permalink, $WPSC_HTTP_HOST ) ) {

[marcomarsala]

Yes, I'm launching php wp-cron.php from a Linux shell. The fix seems to work but more tests will be needed, as actually I don't know what branch is supposed to be executed when php wp-cron.php is launched from command line.

[donnchawp]

The latest version of the plugin now checks if HTTP_HOST is set (in wp-cache-base.php) and if not sets $WPSC_HTTP_HOST to "" and disables caching so this warning shouldn't show up now.

[stodorovic]

@marcomarsala You can see #383. My advice is to you set "environment variables" before run php from shell. Also, maybe you can see this script: https://github.com/szepeviktor/debian-server-tools/blob/master/webserver/wp-cron-cli.sh

I've PHP/shell script which is preparing environment for wp-cron.php, maybe I can improve little it and create my repository. I'll think over about it.

[stodorovic]

This issue is most likely fixed by #475 and other PRs.