It's especially important to have the
strict pragma enabled under mod_perl. While
it's not required by the language, its use cannot be
too strongly recommended. It will save you a great deal of time. And,
of course, clean scripts will still run under mod_cgi!
In the rare cases where it is necessary, you can turn off the
strict pragma, or a part of it, inside a block.
For example, if you want to use symbolic references (see the
perlref manpage) inside a particular block, you
can use no strict
'refs';, as follows:
no strict 'refs';
my $var_ref = 'foo';
$$var_ref = 1;
Starting the block with no strict 'refs'; allows
you to use symbolic references in the rest of the block. Outside this
block, the use of symbolic references will trigger a runtime error.