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/o modifier (regularexpressions): 6.5.3. Compiled Regular Expressions (Practical mod_perl)

ob_clean( ): 13.3.1. Output Buffering (Programming PHP)

ob_end_clean( ): 13.3.1. Output Buffering (Programming PHP)

A.2c. Alphabetical Listing of PHP Functions (j-q) (Programming PHP)

ob_end_flush( ): 13.3.1. Output Buffering (Programming PHP)

A.2c. Alphabetical Listing of PHP Functions (j-q) (Programming PHP)

ob_flush( ): 13.3.1. Output Buffering (Programming PHP)

ob_get_contents( ): A.2c. Alphabetical Listing of PHP Functions (j-q) (Programming PHP)

ob_get_contents( ) function: 13.3.1. Output Buffering (Programming PHP)

ob_get_length( ): 13.3.1. Output Buffering (Programming PHP)

A.2c. Alphabetical Listing of PHP Functions (j-q) (Programming PHP)

ob_gzhandler( ): 13.3.2. Compressing Output (Programming PHP)

A.2c. Alphabetical Listing of PHP Functions (j-q) (Programming PHP)

ob_implicit_flush( ): A.2c. Alphabetical Listing of PHP Functions (j-q) (Programming PHP)

objcopy command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)

objdump command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)

(object) casting operator: 2.4.11. Casting Operators (Programming PHP)

object files: 13.1.1. Quick Overview (Running Linux)

13.2. Makefiles (Running Linux)

Object Linking and Embedding (see OLE)

object methods: 6.1. Terminology (Programming PHP)

PEAR DB library: 8.3. PEAR DB Basics (Programming PHP)
as XML parsing handlers: 11.3.9. Methods as Handlers (Programming PHP)

object-oriented database management systems (OODBMS): 3.1.1. The SQL Story (Managing & Using MySQL)

object-oriented programming: 2.2.6. Objects (Programming PHP)

creating maintainable Perl programs: 9.3.1. A Model for Relational Data (Managing & Using MySQL)
declaring classes: 6.4. Declaring a Class (Programming PHP)
object/relational modeling: 8.3. Object/Relational Modeling (Managing & Using MySQL)
PEAR DB library: 8.3. PEAR DB Basics (Programming PHP)
PHP terminology: 6.1. Terminology (Programming PHP)

object-relational database management systems (ORDBMS): 3.1.1. The SQL Story (Managing & Using MySQL)

Objective-C programming language, compiling (gcc): 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)

objects: 2.2.6. Objects (Programming PHP)

6. Objects (Programming PHP)

A.2b. Alphabetical Listing of PHP Functions (f-i) (Programming PHP)

casting to/from arrays: 2.4.11. Casting Operators (Programming PHP)

COM class and VARIANT type: 15.3.2. PHP Functions (Programming PHP)

creating: 6.2. Creating an Object (Programming PHP)

defined: 6.1. Terminology (Programming PHP)

displaying with print_r( ): 4.2.4. print_r( ) and var_dump( ) (Programming PHP)

extension functions returning: 14.8.3. Objects (Programming PHP)

functions for: A.1. PHP Functions by Category (Programming PHP)

getting class for: A.2b. Alphabetical Listing of PHP Functions (f-i) (Programming PHP)

in XML parsing: 11.3.9. Methods as Handlers (Programming PHP)

instantiating: 8.3. Object/Relational Modeling (Managing & Using MySQL)

introspection: 6.5. Introspection (Programming PHP)

mysql_fetch_object( ) and: 18.2. Functions (Managing & Using MySQL)

properties: 6.1. Terminology (Programming PHP)

A.2b. Alphabetical Listing of PHP Functions (f-i) (Programming PHP)

properties and methods, accessing: 6.3. Accessing Properties and Methods (Programming PHP)

rows in database query results: 8.3.5.3. Inside a row array (Programming PHP)

serialization of: 6.6. Serialization (Programming PHP)

A.3d. Alphabetical Listing of PHP Functions (r-z) (Programming PHP)
_ _sleep( ) and _ _wakeup( )s: 6.6. Serialization (Programming PHP)
logfile (example): 6.6. Serialization (Programming PHP)
unserializing: A.3d. Alphabetical Listing of PHP Functions (r-z) (Programming PHP)

ob_start( ): 13.3.1. Output Buffering (Programming PHP)

A.2c. Alphabetical Listing of PHP Functions (j-q) (Programming PHP)

obtaining FreeBSD Unix: 1.6.3. Which Unix? (Apache: The Definitive Guide)

OCT( ) function: 17.2.2. General Functions (Managing & Using MySQL)

octal numbers: 2.2.1. Integers (Programming PHP)

octdec( ): A.2c. Alphabetical Listing of PHP Functions (j-q) (Programming PHP)

OCTET_LENGTH( ) function: 17.2.2. General Functions (Managing & Using MySQL)

od command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)

mysql_odbc_escape_string( ) and: 19.2. Functions (Managing & Using MySQL)
mysql_odbc_remove_escape( ) and: 19.2. Functions (Managing & Using MySQL)

ODBC data sources, interacting with: 15.4. Interacting with ODBC Data Sources (Programming PHP)

Access: 15.4.4. Working with Access (Programming PHP)

configuring a DSN: 15.4.1. Configuring a DSN (Programming PHP)

accessing data: 15.4.2. Accessing Excel Data (Programming PHP)
limitations as database: 15.4.3. Limitations of Excel as a Database (Programming PHP)

ODBC extension: B.1. Optional Extensions Listing (Programming PHP)

ODBM_File: 19. DBM and mod_perl (Practical mod_perl)

O'Dell, Devon: 11.8. Where to Find Out More (Managing & Using MySQL)

of variable (printcap): 8.4.5.3. The rest of the printcap variables (Running Linux)

offsets, superblock: 8.6.1. Repairing Filesystems (Running Linux)

OLE (Object Linking and Embedding): 15.3.1. Background (Programming PHP)

COM objects and parameters, exposing with Word macro: 15.3.3. Determining the API (Programming PHP)

ON clause (GRANT statement): 6.1.2.1. GRANT and REVOKE (Managing & Using MySQL)

ON keyword: 3.9.5. Outer Joins (Managing & Using MySQL)

one-and-only-one relationships: 7.2.3. Relationships (Managing & Using MySQL)

--one-database mysql option: 4.5.1. mysqldump Recovery (Managing & Using MySQL)

//(one-line comments in PHP scripts): 11.1.1. A Short Language Primer (Managing & Using MySQL)

one-or-many relationships: 7.2.3. Relationships (Managing & Using MySQL)

one-to-many relationships: 7.2.5. Kinds of Relationships (Managing & Using MySQL)

7.4.2. Foreign Keys (Managing & Using MySQL)
designing models for maintainable Perl programs: 9.3.1. A Model for Relational Data (Managing & Using MySQL)
wedding gift registry database: 11.3.1. The Wedding Gift Registry Database (Managing & Using MySQL)

one-to-one relationships: 7.2.5. Kinds of Relationships (Managing & Using MySQL)

designing models for maintainable Perl programs: 9.3.1. A Model for Relational Data (Managing & Using MySQL)
object/relational modeling: 8.3. Object/Relational Modeling (Managing & Using MySQL)

one-way hashes: 5.11. Digest Authentication (Apache: The Definitive Guide)

onintr command (tcsh): 8.9. Built-in Commands (Linux in a Nutshell)

online documentation: 0.. Online Documentation (Linux in a Nutshell)

online documents (Linux resources): 1.8.1. Online Documents (Running Linux)

online help: 3.2.2. Getting Online Help (Running Linux)

online tutorials, CGI: 1.1.2. The Common Gateway Interface Specification (Practical mod_perl)

OODBMS (object-oriented database management systems): 3.1.1. The SQL Story (Managing & Using MySQL)

OOP (see object-oriented programming)

open( ): 6.4.8. Output from System Calls (Practical mod_perl)

ex: 11.14. Alphabetical Summary of ex Commands (Linux in a Nutshell)
ftp: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)

open source: 1.7. Open Source and the Philosophy of Linux (Running Linux)

open source software (see free software)

Open Source web sites: A.3.2. Open Source Projects (Running Linux)

open_basedir option, restricing filesystem access with: 12.2.2. Restrict Filesystem Access to a Specific Directory (Programming PHP)

open_basedir option, restricting filesystem access with: 12.2. Filenames (Programming PHP)

opendir( ): A.2c. Alphabetical Listing of PHP Functions (j-q) (Programming PHP)

open_event( ): A.6.9.3. Event functions (Apache: The Definitive Guide)

files: A.2b. Alphabetical Listing of PHP Functions (f-i) (Programming PHP)

sessions: 7.6.2.3. Custom storage (Programming PHP)

TCP or UDP connection on remote host: A.2b. Alphabetical Listing of PHP Functions (f-i) (Programming PHP)

on specific port: A.2c. Alphabetical Listing of PHP Functions (j-q) (Programming PHP)

openlog( ): A.2c. Alphabetical Listing of PHP Functions (j-q) (Programming PHP)

open_logs phase: 25.2. New Apache Phases and Corresponding Perl*Handlers (Practical mod_perl)

25.2.1.1. PerlOpenLogsHandler (Practical mod_perl)

OpenOffice: 9.3.1. Word Processors (Running Linux)

OpenSSH: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)

scp command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)

OpenSSL: 11.7.1.2. OpenSSL (Apache: The Definitive Guide)

openssl, installing, configuring, and testing: 3.6.2. Installing mod_perl with mod_ssl (+openssl) (Practical mod_perl)

openvt command: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)

operands: 2.4. Expressions and Operators (Programming PHP)

number of: 2.4.1. Number of Operands (Programming PHP)

operating systems

determining: 15.2.1. Determining the Platform (Programming PHP)

A.2c. Alphabetical Listing of PHP Functions (j-q) (Programming PHP)

discontinued products: 8.1.7. Discontinued Products (Practical mod_perl)

hanging processes, debugging: 21.7.1. Hanging Because of an Operating System Problem (Practical mod_perl)

memory leaks, avoiding: 8.1.4. Avoiding Memory Leaks (Practical mod_perl)

memory management: 8.1.3. Good Memory Management (Practical mod_perl)

memory-sharing capabilities: 8.1.5. Memory-Sharing Capabilities (Practical mod_perl)

mod_perl support: 8.1.1. mod_perl Support for the Operating System (Practical mod_perl)

performance tuning for: 5.4. Operating System/Hardware Tuning (Managing & Using MySQL)

releases: 8.1.8. Keeping Up with OS Releases (Practical mod_perl)

security for: 6.2.1. Operating System Security (Managing & Using MySQL)

selecting: 8.1. Choosing the Right Operating System (Practical mod_perl)

smart memory-page caching: 10.1.1. Calculating Real Memory Usage (Practical mod_perl)

stability: 8.1.2. Stability and Robustness (Practical mod_perl)

support costs: 8.1.6. The Real Cost of Support (Practical mod_perl)

supporting PHP: 1.1. What Does PHP Do? (Programming PHP)

operators: 2.4. Expressions and Operators (Programming PHP)

arithmetic: 2.4.5. Arithmetic Operators (Programming PHP)
assignment: 2.4.12. Assignment Operators (Programming PHP)
associativity of: 2.4.3. Operator Associativity (Programming PHP)
autoincrement and autodecrement: 2.4.7. Autoincrement and Autodecrement Operators (Programming PHP)
bitwise: 2.4.9. Bitwise Operators (Programming PHP)
casting: 2.4.11. Casting Operators (Programming PHP)
casting operand types: 2.4.4. Implicit Casting (Programming PHP)
comparison: 2.4.8. Comparison Operators (Programming PHP)
logical: 2.4.10. Logical Operators (Programming PHP)
miscellaneous: 2.4.13. Miscellaneous Operators (Programming PHP)
number of operands: 2.4.1. Number of Operands (Programming PHP)
precedence of: 2.4.2. Operator Precedence (Programming PHP)
string concatenation: 2.4.6. String Concatenation Operator (Programming PHP)
summary of: 2.4. Expressions and Operators (Programming PHP)

operators, SQL: 3.8. SQL Operators (Managing & Using MySQL)

17.1. Operators (Managing & Using MySQL)

optcd= boot option: 3.1.1. Booting Linux (Running Linux)

optimization, mod_perl: 24.3.5. Optimizations (Practical mod_perl)

optimization of code: 13.1.2. gcc Features (Running Linux)

13.1.5. Optimizing (Running Linux)
14.1.1. Tracing a Program (Running Linux)

OPTIMIZE statement: 15.2. SQL Commands (Managing & Using MySQL)

code: 13.5. Performance Tuning (Programming PHP)
database connections: 8.3.2. Connecting (Programming PHP)
execution time: 13.5.3. Optimizing Execution Time (Programming PHP)
memory requirements: 13.5.4. Optimizing Memory Requirements (Programming PHP)

optimizing performance: 5. Performance Tuning (Managing & Using MySQL)

using bind variables: 9.1.4. Introducing Bind Variables and Optimizations (Managing & Using MySQL)
slow query logs: 4.3.3. The Slow Query Log (Managing & Using MySQL)

option argument syntax: 0.. Conventions (Linux in a Nutshell)

optional functions: 20.8.4. Optional Functions (Apache: The Definitive Guide)

example: 20.8.5. Optional Function Example (Apache: The Definitive Guide)

optional hooks: 20.8.2. Optional Hooks (Apache: The Definitive Guide)

example: 20.8.3. Optional Hook Example (Apache: The Definitive Guide)

OPTIONALLY keyword: 3.9.7.3. Pulling data from MySQL (Managing & Using MySQL)

15.2. SQL Commands (Managing & Using MySQL)

-D (debugging): 21.8.2. -D Runtime Option (Practical mod_perl)
fdisk: 3.1.3. Creating Linux Partitions (Running Linux)
getting help with: 3.9.4. Making a Local Apache Installation (Practical mod_perl)
MOD_PERL_TRACE environment variable: 21.4. Tracing mod_perl-Specific Perl Calls (Practical mod_perl)
tar command: 7.1.2. Using tar (Running Linux)

Options directive: 3.5. HTTP Response Headers (Apache: The Definitive Guide)

4.2.2. <Location /perl> Sections (Practical mod_perl)

Includes option: 14. Server-Side Includes (Apache: The Definitive Guide)

merging: 4.1.6. Options Directive Merging (Practical mod_perl)

Options ExecCGI: 3.5. HTTP Response Headers (Apache: The Definitive Guide)

16.2.2. Script in DocumentRoot (Apache: The Definitive Guide)
16.2.2. Script in DocumentRoot (Apache: The Definitive Guide)

Options FollowSymLinks: 3.5. HTTP Response Headers (Apache: The Definitive Guide)

3.5.1. FollowSymLinks, SymLinksIfOwnerMatch (Apache: The Definitive Guide)

Options FollowSymLinksIfOwnerMatch: 3.5.1. FollowSymLinks, SymLinksIfOwnerMatch (Apache: The Definitive Guide)

Options IncludesNoExec: 3.5. HTTP Response Headers (Apache: The Definitive Guide)

Options Indexes: 3.5. HTTP Response Headers (Apache: The Definitive Guide)

Options MultiViews: 3.5. HTTP Response Headers (Apache: The Definitive Guide)

6.2. Content Negotiation (Apache: The Definitive Guide)

Options SymLinksIfOwnerMatch: 3.5. HTTP Response Headers (Apache: The Definitive Guide)

ScriptAlias and: 16.2.2. Script in DocumentRoot (Apache: The Definitive Guide)

16.2.2. Script in DocumentRoot (Apache: The Definitive Guide)

options to Linux commands: 3. Linux Commands (Linux in a Nutshell)

or command (gawk): 13.8. Alphabetical Summary of Commands (Linux in a Nutshell)

OR logical operator: 3.8. SQL Operators (Managing & Using MySQL)

17.1.4. Logical Operators (Managing & Using MySQL)
performing membership tests: 3.8.3. Membership Tests (Managing & Using MySQL)

| (bitwise OR): 2.4.9. Bitwise Operators (Programming PHP)
|= (bitwise OR assignment) operator: 2.4.12.2. Assignment with operation (Programming PHP)

Oracle extensions: B.1. Optional Extensions Listing (Programming PHP)

Oracle SQL: 3.1.1. The SQL Story (Managing & Using MySQL)

Oracle vs. MySQL: 1.4. MySQL Features (Managing & Using MySQL)

ORBit library: 17. GNOME (Linux in a Nutshell)

ord( ): A.2c. Alphabetical Listing of PHP Functions (j-q) (Programming PHP)

ORD( ) function: 17.2.2. General Functions (Managing & Using MySQL)

ORDBMS (object-relational database management systems): 3.1.1. The SQL Story (Managing & Using MySQL)

ORDER BY clause: 3.7.3.1. Basic ordering (Managing & Using MySQL)

15.2. SQL Commands (Managing & Using MySQL)

ORDER BY RAND( ) clause: 3.7.3.1. Basic ordering (Managing & Using MySQL)

order directive: 5.9. Order, Allow, and Deny (Apache: The Definitive Guide)

10.4.1. Server Status (Apache: The Definitive Guide)

origin (PDF coordinates), changing: 10.3.1. Coordinates (Programming PHP)

Orion application server: 13.1.3.2. Data sources revisited (Managing & Using MySQL)

Orwant, Jon: 9.3. A General Model for Maintainable Perl Programs (Managing & Using MySQL)

os_escape_path( ): A.6.12. Path, Filename, and URL Manipulation Functions (Apache: The Definitive Guide)

OSS/Free: 9.5.2. Audio Under Linux (Running Linux)

OSTYPE environment variable (tcsh): 8.4.6. Environment Variables (Linux in a Nutshell)

our( ) declaration: 6.2.1. The First Mystery: Why Does the Script Go Beyond 5? (Practical mod_perl)

Out of memory! message: 22.3.10. Out of memory! (Practical mod_perl)

out-of-process server: 15.3.1. Background (Programming PHP)

outer joins: 1.4. MySQL Features (Managing & Using MySQL)

3.9.5. Outer Joins (Managing & Using MySQL)

output: 13.3. Handling Output (Programming PHP)

buffering: 13.3.1. Output Buffering (Programming PHP)

in error handlers: 13.4.4.2. Output buffering in error handlers (Programming PHP)
functions for: A.2c. Alphabetical Listing of PHP Functions (j-q) (Programming PHP)
setting file buffer size: A.3d. Alphabetical Listing of PHP Functions (r-z) (Programming PHP)

changing document references: 13.3.1. Output Buffering (Programming PHP)

with rewrite( ) callback function: 13.3.1. Output Buffering (Programming PHP)

compressing: 13.3.2. Compressing Output (Programming PHP)

cron utility: 8.2. Scheduling Jobs Using cron (Running Linux)

end-of-line handling on Windows: 15.2.7. End-of-Line Handling (Programming PHP)

functions for: A.1. PHP Functions by Category (Programming PHP)

basic text: 10.2.5. Outputting Basic Text (Programming PHP)
buffering: 10.2.2. Initializing the Document (Programming PHP)
phpinfo( ), checking for installed module: 13.3.1. Output Buffering (Programming PHP)

redirection: 4.9. Saving Your Output (Running Linux)

output filters: 20.9.2. Output Filters (Apache: The Definitive Guide)

output filters, modules: B. Apache Perl Modules (Practical mod_perl)

B.15.1. Apache::OutputChain—Chain Stacked Perl Handlers (Practical mod_perl)

output formatting commands

fmt: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)
fold: 3.1. Alphabetical Summary of Commands (Linux in a Nutshell)

output generation, CGI.pm module: 1.1.2. The Common Gateway Interface Specification (Practical mod_perl)

output streams: 4.9. Saving Your Output (Running Linux)

output to shells: 11.7. Apache's Security Precautions (Apache: The Definitive Guide)

overlay_tables( ): A.6.3. Table Functions (Apache: The Definitive Guide)

overline, text in PDF files: 10.3.3. Text Attributes (Programming PHP)

overrides: 5.16. Overrides (Apache: The Definitive Guide)

overriding methods, derived class vs. parent class: 6.4.3. Inheritance (Programming PHP)

overview: 1.4.3. Kernel (Running Linux)

Overwrite mode (Emacs): 9.2.8. Tailoring Emacs (Running Linux)

overwriting files

avoiding: 4.9. Saving Your Output (Running Linux)
recovery: 8.1. Making Backups (Running Linux)

Ovrimos SQL extension: B.1. Optional Extensions Listing (Programming PHP)

owd variable (tcsh): 8.4.3. Predefined Shell Variables (Linux in a Nutshell)

owners (permissions): 4.13.2. Owners and Groups (Running Linux)

changing: 4.14. Changing the Owner, Group,and Permissions (Running Linux)

ownership of binaries, setting up: 2.2.1. Binary (Tarball) Distributions (Managing & Using MySQL)

2.2.3. Source Distributions (Managing & Using MySQL)

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