Stops processing options.

(That’s the number zero.) Designates an initial octal value for the record separator $/. See also -l below.

Turns on autosplit mode when used with -n or -p. Splits to @F.

Checks syntax but does not execute. It does run BEGIN and CHECK blocks.

Uses native wide-character system APIs, if supported by the system.

Runs the script under the indicated module. Default module is the Perl debugger. Use -de 0 to start the debugger without a script.

Sets debugging flags.

May be used to enter a single line of script. Multiple -e commands may be given to build up a multiline script.

Specifies a pattern on which to split if -a is in effect.

Prints the Perl usage summary. Does not execute.

Activates in-place editing for files processed by the <> construct.

The directory is prepended to the search path for Perl modules, @INC. Combined with -P, -I also tells the C preprocessor where to look for include files.

(That’s the letter el.) Enables automatic line ending processing, e.g., -l013.

See -M on the facing page.

Does a use module before executing the script. With - does a no module instead.

Assumes an input loop around the script. Lines are not printed.

Assumes an input loop around the script. Lines are printed.

Runs the C preprocessor on the script before compilation by Perl.

Interprets -xxx on the command line as a switch and sets the corresponding variable $xxx in the script to 1. If the switch is of the form -xxx=yyy, the $xxx variable is set to yyy.

Uses the PATH environment variable to search for the script.

Turns on taint checking. warns on taint violations.

Turns on taint checking. dies on taint violations.

Dumps core after compiling the script. To be used with the undump program. Obsolete.

Allows Perl to perform certain unsafe operations.

Prints the version and patch level of your Perl executable. Does not execute anything.

Prints Perl configuration information, e.g., -V:man.dir. Does not execute anything.

Prints warnings about possible spelling errors and other error-prone constructs in the script. Can be enabled and disabled under program control.

Enables warnings permanently.

Extracts the program script from the input stream. If dir is specified, Perl switches to this directory before running the script.

Disables warnings permanently.