Can somebody explain me exaclty what this part of code actually does? thank you! 
$db = ($ENV{'SERVER_NAME'} ne "50free.net")
   ? DBI->connect("DBI:mysql:nikos_db", "root", "")
   : DBI->connect("DBI:mysql:nikos_db:50free.net","nikos_db","macgyver
+")
   or print font({-size=>5, -color=>'Lime'}, $DBI::errstr) and exit 0

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janitored by ybiC: Retitle form "clarification question"

 I also wanted to show you that when i use the above code my index.pl page gives me this error: 
Can't connect to local MySQL server through socket '/var/run/mysqld/my
+sqld.sock' (2)

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but when i am using the following it works ok! 
$db = DBI->connect('DBI:mysql:nikos_db', 'root', '') or
$db = DBI->connect('DBI:mysql:nikos_db:50free.net', 'nikos_db', 'macgy
+ver', {RaiseError=>1});

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why is this happening?

In reply to Ternary confusion by Nik

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