"Perl Programmers Reference Guide (англ.) (программ.) /19.12.1998/ " - читать интересную книгу автора

A line-oriented form of quoting is based on the shell
"here-doc" syntax. Following a << you specify a string to
terminate the quoted material, and all lines following the
current line down to the terminating string are the value
of the item. The terminating string may be either an
identifier (a word), or some quoted text. If quoted, the
type of quotes you use determines the treatment of the
text, just as in regular quoting. An unquoted identifier
works like double quotes. There must be no space between
the << and the identifier. (If you put a space it will be
treated as a null identifier, which is valid, and matches
the first empty line.) The terminating string must appear
by itself (unquoted and with no surrounding whitespace) on
the terminating line.

print < The price is $Price.
EOF

print <<"EOF"; # same as above
The price is $Price.
EOF

print <<`EOC`; # execute commands

echo hi there
echo lo there
EOC

print <<"foo", <<"bar"; # you can stack them
I said foo.
foo
I said bar.
bar



14/Jun/98 perl 5.005, patch 02 15





PERLDATA(1) Perl Programmers Reference Guide PERLDATA(1)


myfunc(<<"THIS", 23, <<'THAT');
Here's a line
or two.
THIS

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