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Perl Functions by Category

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, package, use
 
Miscellaneous functions

defined, dump, eval, formline, local, my, 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, getsockopt, 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, getpwuid, setgrent, setpwent
 
Fetching network info

endprotoent, endservent, gethostbyaddr, gethostbyname, gethostent, getnetbyaddr, getnetbyname, getnetent, getprotobyname, getprotobynumber, getprotoent, getservbyname, getservbyport, getservent, sethostent, setnetent, setprotoent, 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, prototype, qx, qw, readline, readpipe, ref, sub, sysopen, tie, tied, uc, ucfirst, untie, use
 
Functions obsoleted in perl5

dbmclose, dbmopen

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