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You can do more than just read a file of course. You can
also open a filehandle for writing with the greater than
sign (>) using the syntax:
open ([FILE_HANDLE_NAME], ">[filename]");
or for appending using the double-greater-than symbol
(>>) with the syntax:
open ([FILE_HANDLE_NAME], ">>[filename]");
The difference between appending and writing is that
when you write to a file, you erase whatever was
previously there whereas when you append to a file, you
simply add the new information to the end of whatever
text was already there.
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If the file that Perl is asked to write or
append to does not already exist, Perl will create the
file for you.
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Typically, when writing to a file, you use the print
function. However, instead of printing to standard output,
you would specify the filename to print to. Consider the
following example:
open (TEMP_FILE, ">temp.file") ||
&CgiDie ("Cannot open temp.file");
print TEMP_FILE "hello there\n";
close (TEMP_FILE);
The file "temp.file" will now have the
solitary line:
hello there
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