|
$_
|
The default or implicit variable
|
|
@_
|
Subroutine parameters
|
|
$a $b
|
Sort comparison routine variables
|
|
@ARGV
|
The command-line args
|
|
$$
|
Process ID
|
|
$<
|
Real user id of process
|
|
$>
|
Effective user id of process
|
|
$(
|
Real group id of process
|
|
$)
|
Effective group id of process
|
|
$0
|
Program name
|
|
$^O
|
Operating System name
|
|
${^ENCODING}
|
The object reference to the Encode object, used to convert the source code to Unicode
|
|
${^OPEN}
|
Internal use: \0 separated Input / Output layer information
|
|
${^UNICODE}
|
Read-only Unicode settings
|
|
${^UTF8CACHE}
|
State of the internal UTF-8 offset caching code
|
|
${^UTF8LOCALE}
|
Indicates whether UTF8 locale was detected at startup
|
|
@F
|
Autosplit (-a mode) recipient
|
|
@INC
|
List of library paths
|
|
%INC
|
Keys are filenames, values are paths to modules included via
use, require, or do |
|
%ENV
|
Hash containing current environment variables
|
|
%SIG
|
Signal handlers
|
|
$[
|
Array and substr first element (Deprecated!)
|
|
$?
|
Child error. Status code of most recent system call or pipe
|
|
$!
|
Operating System Error. (What just went 'bang'?)
|
|
$^E
|
Extended Operating System Error (Extra error explanation)
|
|
$@
|
Eval error
|
|
${^CHILD_ERROR_NATIVE}
|
Native status returned by the last pipe close, backtick (`` ) command, successful call to wait() or waitpid(), or from the system() operator
|
|
$.
|
Current line number (or record number) of most recent filehandle
|
|
$/
|
Input record separator
|
|
$|
|
Output autoflush. 1=autoflush, 0=default. Applies to currently selected handle
|
|
$,
|
Output field separator (lists)
|
|
$\
|
Output record separator
|
|
$"
|
Output list separator. (interpolated lists)
|
|
$;
|
Subscript separator. (Use a real multidimensional array instead)
|
|
$<digit>
|
Regexp parenthetical capture holders
|
|
$&
|
Last successful match (degrades performance)
|
|
${^MATCH}
|
Similar to $& without performance penalty. Requires /p modifier
|
|
$`
|
Prematch for last successful match string (degrades performance)
|
|
${^PREMATCH}
|
Similar to $` without performance penalty. Requires /p modifier
|
|
$'
|
Postmatch for last successful match string (degrades performance)
|
|
${^POSTMATCH}
|
Similar to $' without performance penalty. Requires /p modifier
|
|
$+
|
Last paren match
|
|
$^N
|
Last closed paren match (last submatch)
|
|
@+
|
Offsets of ends of successful submatches in scope
|
|
@-
|
Offsets of starts of successful submatches in scope
|
|
%+
|
Like @+, but for named submatches
|
|
%-
|
Like @-, but for named submatches
|
|
$^R
|
Last regexp (?{code}) result
|
|
${^RE_DEBUG_FLAGS}
|
Current value of regexp debugging flags. See use re 'debug'
|
|
${^RE_TRIE_MAXBUF}
|
Control memory allocations for RE optimizations for large alternations
|
|
$]
|
Old: Version and patch number of perl interpreter. Deprecated
|
|
$^C
|
Current value of flag associated with -c switch
|
|
$^D
|
Current value of debugging flags
|
|
$^F
|
Maximum system file descriptor
|
|
$^I
|
Value of the -i (inplace edit) switch
|
|
$^M
|
Emergency Memory pool
|
|
$^P
|
Internal variable for debugging support
|
|
$^R
|
Last regexp (?{code}) result
|
|
$^S
|
Exceptions being caught. (eval)
|
|
$^T
|
Base time of program start
|
|
$^V
|
Perl version
|
|
$^W
|
Status of -w switch
|
|
${^WARNING_BITS}
|
Current set of warning checks enabled by
use warnings; |
|
$^X
|
Perl executable name
|
|
${^GLOBAL_PHASE}
|
Current phase of the Perl interpreter
|
|
$^H
|
Internal use only: Hook into Lexical Scoping
|
|
%^H
|
Internaluse only: Useful to implement scoped pragmas
|
|
${^TAINT}
|
Taint mode read-only flag
|
|
${^WIN32_SLOPPY_STAT}
|
If true on Windows
stat() won't try to open the file |
|
ARGV
|
Filehandle iterates over files from command line (see also
<>) |
|
$ARGV
|
Name of current file when reading <>
|
|
@ARGV
|
List of command line args
|
|
ARGVOUT
|
Output filehandle for -i switch
|
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