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Index: R

race condition, created by changing file permissions: 12.4.1. Get It Right the First Time
rad2deg( ) function: A.3d. Alphabetical Listing of PHP Functions (r-z)
rand( ) function: A.3d. Alphabetical Listing of PHP Functions (r-z)
largest value returned by: A.2b. Alphabetical Listing of PHP Functions (f-i)
randomizing array order: 5.8.5. Randomizing Order
range( ) function: 5.3.2. Assigning a Range of Values
A.3d. Alphabetical Listing of PHP Functions (r-z)
range of characters in regular expressions: 4.8.2. Character Classes
raw image format, PDF files: 10.4.1. Images
rawurldecode( ) function: 4.5.2.1. RFC 1738 encoding and decoding
A.3d. Alphabetical Listing of PHP Functions (r-z)
rawurlencode( ) function: 4.5.2.1. RFC 1738 encoding and decoding
A.3d. Alphabetical Listing of PHP Functions (r-z)
RDBMS (Relational Database Management Systems): 8.2. Relational Databases and SQL
read and write handlers for sessions: 7.6.2.3. Custom storage
readdir( ) function: A.3d. Alphabetical Listing of PHP Functions (r-z)
readfile( ) function: 9.6.1. Caching the Dynamically Generated Buttons
A.3d. Alphabetical Listing of PHP Functions (r-z)
Readline library (GNU): B.1. Optional Extensions Listing
readlink( ) function: A.3d. Alphabetical Listing of PHP Functions (r-z)
real numbers: 2.2.2. Floating-Point Numbers
A.2b. Alphabetical Listing of PHP Functions (f-i)
realpath( ) function: A.3d. Alphabetical Listing of PHP Functions (r-z)
checking filenames with: 12.2. Filenames
Recode library (GNU): B.1. Optional Extensions Listing
rectangles, drawing: 9.4.5. Basic Drawing Functions
recursive structures, avoiding use of print_r( ) or var_dump( ) on: 4.2.4. print_r( ) and var_dump( )
red, green, blue (RGB) color values: 9.3. Basic Graphics Concepts
9.4.1. The Structure of a Graphics Program
getting with ImageColorsForIndex( ): 9.8.2. Identifying Colors
redirection: 7.5.2. Redirections
13.5.5.2. Load balancing and redirection
Unix shell: 15.2.9. External Commands
reducing an array: 5.7.5. Reducing an Array
reference counting, managing memory with: 2.3.4. Garbage Collection
references
to external entities in XML: 11.3.4.1. External entities
in extensions: 14.9. References
incrementing count for zval: 14.7.3. An Example with Variable Argument List
to variable stored in another variable: 2.3.1. Variable Variables
variables containing object references: 6.2. Creating an Object
register_globals (php.ini file)
disabling for security purposes: 12.1. Global Variables and Form Data
security of global variables: 12.1. Global Variables and Form Data
register_shutdown_function( ): A.3d. Alphabetical Listing of PHP Functions (r-z)
register_tick_function( ): A.3d. Alphabetical Listing of PHP Functions (r-z)
regular expressions: 4.8. Regular Expressions
alternatives in: 4.8.3. Alternatives
character classes: 4.8.2. Character Classes
manipulating strings with: A.3d. Alphabetical Listing of PHP Functions (r-z)
patterns, types of: 4.8.1. The Basics
Perl-compatible: 4.10. Perl-Compatible Regular Expressions
anchors: 4.10.4. Anchors
backreferences: 4.10.7. Backreferences
character classes: 4.10.3. Character Classes
conditional expressions in: 4.10.12. Conditional Expressions
cut subpattern: 4.10.11. Cut
delimiters: 4.10.1. Delimiters
flags (trailing options): 4.10.8. Trailing Options
functions for working with: 4.10.13. Functions
inline options: 4.10.9. Inline Options
lookahead and lookbehind assertions: 4.10.10. Lookahead and Lookbehind
match behavior: 4.10.2. Match Behavior
non-capturing groups: 4.10.6. Non-Capturing Groups
quantifiers and greed: 4.10.5. Quantifiers and Greed
PHP, differences from Perl: 4.10.14. Differences from Perl Regular Expressions
POSIX-style: 4.9. POSIX-Style Regular Expressions
anchors: 4.9.2. Anchors
character classes: 4.9.1. Character Classes
functions for: 4.9.3. Functions
quantifiers for repeating patterns: 4.8.4. Repeating Sequences
search and replace operations
with ereg( ) and ereg_replace ( ): A.2a. Alphabetical Listing of PHP Functions (a-e)
Relational Database Management Systems (RDBMS): 8.2. Relational Databases and SQL
relative paths
checking for: 12.2.1. Check for Relative Paths
security problems with: 12.2. Filenames
remote files
opening with PHP functions, security risks of: 12.2. Filenames
retrieving on Unix and Windows: 15.2.6. Remote Files
Remote Procedure Call (RPC): 15.3.1. Background
remote servers, YAZ toolkit: B.1. Optional Extensions Listing
removing
array elements: 5.5.5. Removing and Inserting Elements in an Array
leading or trailing whitespace from strings: 4.4.1. Removing Whitespace
rename( ) function: A.3d. Alphabetical Listing of PHP Functions (r-z)
repeating sequences, quantifiers for: 4.8.4. Repeating Sequences
repeating strings: 4.7.2. Miscellaneous String Functions
replacing
characters in strings: 4.7.1. Substrings
matched patterns in strings: 4.10.13.2. Replacing
matched strings, POSIX regular expressions: 4.9.3.2. Replacing
replication
MySQL: 13.5.5.3. MySQL replication
reverse proxies and: 13.5.5. Reverse Proxies and Replication
reporting errors: 13.4.1. Error Reporting
disabling: 13.4.2. Error Suppression
error-reporting values: 13.4.1. Error Reporting
turning off entirely: 13.4.2. Error Suppression
request/response cycle, HTTP
GET requests: 7.2. Variables
request: 7.1. HTTP Basics
response: 7.1. HTTP Basics
requests, XML-RPC: 11.5.1. Servers
require construct: 2.6. Including Code
require( ) function: 15.2.6. Remote Files
opening remote files, security and: 12.2. Filenames
require_once: 2.6. Including Code
13.1. Code Libraries
reserved words, stdClass: 6.4. Declaring a Class
reset( ) function: 5.7.2. The Iterator Functions
A.3d. Alphabetical Listing of PHP Functions (r-z)
resources: 2.2.7. Resources
A.2b. Alphabetical Listing of PHP Functions (f-i)
handles, returning type of: A.2b. Alphabetical Listing of PHP Functions (f-i)
using in extensions: 14.13. Resources
rest of a string, searches returning: 4.7.4.2. Searches returning rest of string
restore_error_handler( ) function: 13.4.4. Defining Error Handlers
A.3d. Alphabetical Listing of PHP Functions (r-z)
return statements: 2.5.7. exit and return
3.2. Defining a Function
return values, extension functions: 14.8. Returning Values
RETVAL_LONG( ) macro: 14.8.1. Simple Types
reverse-proxy caches: 13.5.5. Reverse Proxies and Replication
reversing
array element order: 5.8.4. Reversing Arrays
strings: 4.7.2. Miscellaneous String Functions
rewind( ) function: A.3d. Alphabetical Listing of PHP Functions (r-z)
rewinddir( ) function: A.3d. Alphabetical Listing of PHP Functions (r-z)
rewrite( ) function: 13.3.1. Output Buffering
right-justified strings: 4.2.3.1. Format modifiers
right shift (>>) operator: 2.4.9. Bitwise Operators
rmdir( ) function: A.3d. Alphabetical Listing of PHP Functions (r-z)
rollback( ) method: 8.4.7. Transactions
rot13( ) function: 14.3.4. Fleshing Out the Skeleton
rot13 extension: 14.3.4. Fleshing Out the Skeleton
round( ) function: A.3d. Alphabetical Listing of PHP Functions (r-z)
RPC (Remote Procedure Call): 15.3.1. Background
rsort( ) function: 5.8.1. Sorting One Array at a Time
A.3d. Alphabetical Listing of PHP Functions (r-z)
RSS document, generating using PHP: 11.2. Generating XML
rtrim( ) function: 4.4.1. Removing Whitespace
A.3d. Alphabetical Listing of PHP Functions (r-z)
runtime errors: 13.4.1. Error Reporting

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