linux-wyee:/home/martin/perl # perl test_7.pl
http://www.unifr.ch/sfm
http://www.zug.phz.ch
http://www.schwyz.phz.ch
http://www.luzern.phz.ch
http://www.schwyz.phz.ch                                                        http://www.phvs.ch                                                              http://www.phtg.ch                                                              http://www.phsg.ch                                                              http://www.phsh.ch                                                              Use of uninitialized value $png in print at test_7.pl line 25, <$urls> line 10.                                                                             http://www.phr.ch                                                               http://www.hepfr.ch/
http://www.phbern.ch
http://www.ph-solothurn.ch
http://www.pfh-gr.ch
Got status code 500 at test_7.pl line 14
linux-wyee:/home/martin/perl #