I\'m having this weird problem. All my settings used to work OK, until I updated my version of PHP. I use macports and have the php5 and php5-xdebug ports installed.
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The above didn't work for me because as far as I can tell if you're using Xdebug the only debug bookmarklets you get is start/stop and debug this page. I don't see any bookmarklet specific to stopping on first line, and neither the start/stop bookmarklets nor stopping PHPStorm from listening within PHPStorm fixed the problem for me.
To get it to stop I did this (on OS X):