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Perl: How to debug in Perl?

Turn on warnings by
use warning;

To run a perl script with warnings, type -w with the shebang as in
#!/usr/bin/perl -w
print “Content-type: text/html\n\n”;
print “Hello World\n”;

Check if you have the following line in the program
print “Content-type: text/html\n\n”;
This will output the text to the browser from the server.

Print error messages to the browser using
use CGI::Carp qw(fatalsToBrowser);

The other way is to use the print command to debug your program.

Common error messages
» The specified CGI application misbehaved by not returning a complete set of HTTP headers.
» Can’t locate in @INC (@INC contains: ….. )


Written by kurinchilamp

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