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Index: P

command (debugger) : Debugger Commands
-p file test operator : Named Unary and File Test Operators
-p switch, perl : Switches
-P switch, perl : Switches
pack function : pack
package declaration
- package
- Packages
package variables : (see global, variables)
packages
- (see also modules)
- Packages, Modules, and Object Classes
- Autoloading
- The Standard Perl Library
- BEGIN and END subentries : Package Constructors and Destructors: BEGIN and END
- binding variables to : untie
- blessing objects into : bless
- declaring
- - Scoped Declarations
  - package
- importing semantics to : use
- names for : Developing with Style
- tying variables to : tie
packed sockaddr : getpeername
page numbers : Per-Filehandle Special Variables
pages : Per-Filehandle Special Variables
pairs, key/value : (see hashes)
paragraph mode
- Global Special Variables
- Switches
paragraphs, wrapping text into : Text::Wrap - Wrap Text into a Paragraph
parent classes : Brief Refresher on Object-Oriented Developing
parent processes : (see processes)
parentheses : (see () (parentheses))
parse file specifications : File::Basename - Parse File Specifications
ParseWords module : Text::ParseWords - Parse Text into a List of Tokens
"passes-the-buck-to" relationship : Delegation (the "Passes-the-Buck-to" Relationship)
passing
- reference : Passing References
- symbol table entries : Passing Symbol Table Entries (Typeglobs)
passwd file : (see /etc/passwd file)
passwords : srand
- crypt function and : crypt
patches : Patches
PATH environment variable
- Switches
- Cleaning up your path
Path module : File::Path - Create or Remove a Series of Directories
pathname, current working directory : Cwd - Get Pathname of Current Working Directory
pattern-matching operator : Regular Expressions
patterns
- (see also m// (match) operator; m?? (match) operator)
- (see also regular expressions)
- Regular Expressions
- Pattern Matching
- /PATTERN/
- embedded modifiers for : Regular expression extensions
- greedy matching
- - Quantifiers
  - The rules of regular expression matching
- matching precedence : The rules of regular expression matching
- minimal matching : Minimal Matching
- quantifiers : The rules of regular expression matching
- special variables for matching : Regular Expression Special Variables
- split function and : split
- study function : study
- for untainting data : Detecting and laundering tainted data
pausing scripts : sleep
Penguin module : Penguin
percent sign (%) : (see % (percent sign))
performance
- Efficiency
- Perl tutorial
- measuring : times
period : (see (dot))
Perl
- extensions to : (see extensions, Perl)
- history of : History Made Practical
- obtaining : How to Get Perl
Perl 4 (and before) : Previous Perl Traps
perl interpreter program
- How to Do It
- Switches
- -- switch : Switches
- -0 switch : Switches
- -a switch
- - Global Special Arrays
  - Switches
- -c switch : Switches
- -D switch : Switches
- -d switch
- - Switches
  - The Perl Debugger
  - Alternative Debuggers: The Perl Profiler
- -e switch : Switches
- -e switch : How to Do It
- -F switch : Switches
- -h switch : Switches
- -i switch : Switches
- -I switch : Switches
- -l switch : Switches
- -m switch : Switches
- -M switch : Switches
- -n switch : Switches
- -P switch : Switches
- -p switch : Switches
- -S switch
- - Switches
  - UNIX-domain clients and servers
- -s switch : Switches
- sticky bit : Time Efficiency
- -T switch
- - Switches
  - Internet TCP clients and servers
  - Handling Insecure Data
- -U switch : Switches
- -u switch : Switches
- -V switch : Switches
- -v switch : Switches
- -w switch
- - How to Do It
  - Functions
  - Switches
  - diagnostics - Force Verbose Warning Diagnostics
  - Diagnostic Messages
- -x switch
- - Command Processing
  - Switches
Perl Profiler : Alternative Debuggers: The Perl Profiler
Perl standard library : The Standard Perl Library
PERL5DB variable : Debugger Customization
PERL_DESTRUCT_LEVEL variable : Note on Garbage Collection
$PERL_VERSION : (see $ variables, $] variable)
$PERLDB : (see $ variables, $^P variable)
perldb file : Debugger Customization
perldoc command : Perl Manpages
permissions
- sysopen
- umask
permissions, file
- changing : chmod
pi : atan2
picture lines
- Formats
- format
pid : (see processes)
$PID : (see $ variables, $$ variable)
Ping module : Net::Ping - Check Whether a Host Is Online
pingecho() : Net::Ping - Check Whether a Host Is Online
pipe function : pipe
pipe symbol : (see | (vertical bar))
pipes : Pipes
- closing : close
pluralities : (see arrays)
plus : (see + (plus sign))
Pod::Text module : Pod::Text - Convert POD Data to Formatted ASCII Text
poetry in Perl : Perl Poetry
pop function : pop
port
- getting name from number : getservbyname
- getting number from name : getservbyname
porting, efficiency of : Porter Efficiency
pos function : pos
positive lookahead assertion : Regular expression extensions
POSIX module : POSIX - Perl Interface to IEEE Std 1003.1
$POSTMATCH : (see $ variables, $' variable)
pound sign : (see # (sharp))
pragmas
- Global Declarations
- Pragmas
- use
- Packages, Modules, and Object Classes
- Switches
- The Standard Perl Library
- modules and : Modules
pre-extending arrays : Time Efficiency
precedence
- Functions
- Previous Perl Traps
- diagnostic messages : Diagnostic Messages
- key/value pair (hashes) : Hashes (Associative Arrays)
- logical operators : Logical and, or, not, and xor
- operator, table of : Operators
- regular expression matching : The rules of regular expression matching
$PREMATCH : (see $ variables, $` variable)
prepending
- directories to @INC : Switches
- elements to arrays : unshift
print function
- print
- Awk Traps
- Time Efficiency
printf function
- printf
- sprintf
- Time Efficiency
printing
- multidimensional arrays
- multidimensional hashes : Access and printing of a hash of hashes
- nested data structures : Debugger Commands
priority, process : setpriority
private variables : (see local, variables)
procedures : Verbs
process group
- getpgrp
- setpgrp
process ID (pid)
- getting process group from : getpgrp
- returning : getppid
- returning with fork : fork
$PROCESS_ID : (see $ variables, $$ variable)
processes
- error handling poermission for : IPC::Open3 - Open a Process for Reading, Writing, and Error Handling
- fork function : fork
- getting group for : setpgrp
- ID (pid) : open
- interprocess communication (IPC) : Cooperating with Other Processes
- killing : kill
- named pipes : Named pipes
- priority, setting : setpriority
- read/write permission for : IPC::Open2 - Open a Process for Both Reading and Writing
- returning priority of : getpriority
- umask for : umask
- variables for : Global Special Variables
- waiting for : wait
- zombie : Signals
processing shell commands : Command Processing
program generators : Program Generation
$PROGRAM_NAME : (see $ variables, $0 variable)
developing style : Developing with Style
programs
- core dump of : dump
- executing : system
- exiting : exit
protocols
- name-number translations
- - getprotobyname
  - getprotobynumber
prototypes : Prototypes
pseudo-literals : (see input, operators)
purging : (see deleting)
push function : push
put function : Using the Berkeley DB interface directly
pwd command (UNIX) : Time Efficiency
PWD environment variable : Cwd - Get Pathname of Current Working Directory

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