Thread:Project:Support desk/Warning: is executable(): open basedir restriction in effect/reply (7)

Adding $wgPhpCli = 'php'; to /wiki/LocalSettings.php worked on my configuration as well. Thanks for sharing.

(In my LocalSettings.php I actually had to add a new line for $wgPhpCli. Searching for that variable only gave me occurences in DefaultSettings.php - just an addition which may help other MediaWiki newbies like me.)