Improve data validation in plugin.php

[rpayne7264]

function plugin_basename does not do proper data validation of $realdir variable before attempting to use strpos():

PHP Warning: strpos(): Empty needle in /wp-includes/plugin.php on line 736

[desrosj]

Hi @rpayne7264,

Are you still seeing this issue? Can you detail the situation where you are seeing this error? What steps can be taken to produce it?

[mindctrl]

Hi @rpayne7264,

We don't have any other reports of this issue, and it's not clear how to trigger the warning. Since it's been 9 years, I'm going to close this to help clean up Trac. Feel free to reopen if this is still an issue that can be reproduced.