Re^3: Variable will not stay shared in a sporadically crashing CGI

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Re^4: Variable will not stay shared in a sporadically crashing CGI by LanX (Saint) on Oct 02, 2017 at 14:02 UTC
I'd say the problem is inter-mixing lexicals `my $cgi` with package symbols like named subs like `sub print_document` Changing to lexicals holding anonymous sub refs `my $print_document = sub {}` would solve the OP'S problem too. Having persistent shared globals can be a desired effect. (Initialization overhead, communication channel) Cheers Rolf _{(addicted to the Perl Programming Language and ☆☆☆☆ :) Je suis Charlie!}	[reply] [d/l] [select]
Re^4: Variable will not stay shared in a sporadically crashing CGI by Anonymous Monk on Oct 02, 2017 at 13:48 UTC
This is getting a bit off-topic, but some globals are ok. Novice programmers don't always know when they're safe and when they aren't, and they're often too timid to change a global to a local when it really needs to be done. That's why we advise people not to use globals at all. But CGI is probably safe as a global, because there's no reason to have two of them in your program.	[reply]
Re^5: Variable will not stay shared in a sporadically crashing CGI by haukex (Archbishop) on Oct 02, 2017 at 13:53 UTC
But CGI is probably safe as a global, because there's no reason to have two of them in your program. I absolutely agree with the general comment about some globals being ok if the coder knows what they are doing - but we are talking about mod_perl here, better to play it safe, and lexicals are arguably safer* in this case. * Update: "safer" not in the sense of security, but in less chances for things to go wrong.	[reply]