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Function Groups

Most popular functions:



Functions for SCALARs or strings

chomp chop chr crypt hex index
lc lcfirst length oct ord pack
q/STRING/ qq/STRING/ reverse rindex sprintf substr
tr/// uc ucfirst y///


Regular expressions and pattern matching

m// pos quotemeta s/// split study
qr//


Numeric functions

abs atan2 cos exp hex int
log oct rand sin sqrt srand


Functions for real @ARRAYs

pop push shift splice unshift


Functions for list data

grep join map qw/STRING/ reverse sort
unpack


Functions for real %HASHes

delete each exists keys values


Input and output functions

binmode close closedir dbmclose dbmopen die
eof fileno flock format getc print
printf read readdir rewinddir seek seekdir
select syscall sysread sysseek syswrite tell
telldir truncate warn write


Functions for fixed length data or records

pack read syscall sysread syswrite unpack
vec


Functions for filehandles, files, or directories

-X chdir chmod chown chroot fcntl
glob ioctl link lstat mkdir open
opendir readlink rename rmdir stat symlink
umask unlink utime


Keywords related to the control flow of your perl program

caller continue die do dump eval
exit goto last next redo return
sub wantarray


Keywords related to scoping

caller import local my our package
use


Miscellaneous functions

defined dump eval formline local my
our reset scalar undef wantarray


Functions for processes and process groups

alarm exec fork getpgrp getppid getpriority
kill pipe qx/STRING/ setpgrp setpriority sleep
system times wait waitpid


Keywords related to perl modules

do import no package require use


Keywords related to classes and object-orientedness

bless dbmclose dbmopen package ref tie
tied untie use


Low-level socket functions

accept bind connect getpeername getsockname get-
sockopt listen recv send setsockopt shutdown
socket socketpair


System V interprocess communication functions

msgctl msgget msgrcv msgsnd semctl semget
semop shmctl shmget shmread shmwrite


Fetching user and group info

endgrent endhostent endnetent endpwent getgrent getgrgid
getgrnam getlogin getpwent getpwnam getp- wuid
setgrent setpwent


Fetching network info

endprotoent endservent gethostbyaddr gethostbyname gethostent getnetbyaddr
getnetbyname getnetent getpro- tobyname getprotobynumber getprotoent
getservbyname getservbyport getservent sethostent setnetent setpro-
toent setservent


Time-related functions

gmtime localtime time times


Functions new in perl5

abs bless chomp chr exists formline
glob import lc lcfirst map my
no our prototype qx qw readline
readpipe ref sub* sysopen tie tied
uc ucfirst untie use
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