escape sequences, string
escapeshellarg( )
2nd
escaping
HTML entities
2nd
metacharacters in regular expressions
quotes in query data
regular expression pattern delimiters
SQL and shell globbing wildcards
user-entered data on HTML page
European languages, characters for
eval( )
Event Log (Windows NT)
event-based parsing
exclusive locks
execute permission
execute( )
execute( ) (DB)
2nd
executeMultiple( ) (DB)
exp( )
expat library
processing an RSS feed and transforming to HTML
WDDX, use with
expiration time for cookies
past, for deleting cookies
explode( ) 
bar chart graphic, sizing lines
comma-separated data and
generating time parts with date
parsing hash from cookie value
splitting on strings instead of regular expressions
strings, breaking into pieces
exponents
2nd
expressions 
between { and }, evaluating
interpolating within strings
ext/standard/parsedate.y
extended regular expressions
[See ereg functions regular expressions] 
extending classes
extends keyword
extensions 
DOM XML
parsing XML
encryption functions
FTP
GD
2nd
[See also GD library] 
gettext
getting configuration variables for
IMAP
2nd
LDAP
mcrypt
PHP Extension and Application Repository (PEAR)
PHP-GTK
2nd
Readline
WDDX
XML
XML-RPC
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add print button to pdf form; changing font size in pdf form
xmlrpc-epi
XSLT
zip
zlib
extensions, filename
external programs, running
passing input to
factory( ) (Mail)
failure returned from functions
false values
fatal errors 
caused by functions with identical names
E_USER_ERROR
fclose( )
2nd
feof( )
fetchInto( ) 
DB class
2nd
DB_Result class
fetchRow( ) 
DB class
2nd
DB_Pager class
DB_Result class
fflush( )
2nd
fgetcsv( )
skipping selected return values
fgets( )
counting lines, paragraphs, and records in a file
line length argument for variable length records
fgetss( )
fields 
hidden form fields, hashes in
variable length text fields, processing from a file
_ _FILE_ _ constant
file descriptors for standard error and standard output
file extensions, matching with regular expressions
file handles
[See also files; input/output]2nd
creating with standard I/O streams in CLI binary
database connections
database connections and statements
for writing CURLOUT_STDERR
writing to many simultaneously
writing web page to file
file transfer protocol
[See FTP] 
file( )
2nd
3rd
4th
reading file into an array
reading lines of file into an array
file_exists( )
fileatime( )
filectime( )
filemtime( )
2nd
filenames 
matching a pattern
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splitting into component parts
files
2nd
[See also directories] 
compressed 
extracting from ZIP archive
reading and writing
configuration, reading
cookies, writing to
copying or moving
counting lines, paragraphs, or records in
creating or opening local
deleting
escaping shell metacharacters in
finding all lines that match a pattern
flushing output to
functions for information about
getting file information
inodes
localizing
locking
advisory locking
DBM databases
directory as lock indicator
exclusive locks
file as lock indicator
nonblocking file locks
text files vs. databases
unlocking
modifying in place without temporary file
outputting DOM XML document to
permissions
[See permissions] 
picking random line from
processing all in a directory
2nd
processing backward by line or paragraph
processing each word in
processing variable length text fields
randomizing all lines in
reading data from
reading into a string
reading particular line in
reading to/writing from specific location in
reading XML from with DOM
remote, opening
removing last line of
site-search.php program
storing encrypted data in
retrieving file and decrypting data
symbolic links
temporary, creating
uploaded, processing
writing to many filehandles simultaneously
filesize( )
filled images 
ellipses and circles
lines, rectangles, and polygons
polygons
rectangles
2nd
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rectangles for bars on bar chart
first week in a year
Fisher-Yates shuffle for arrays
2nd
fixed-width records, parsing in strings
flat-file databases
[See DBM databases] 
flipping arrays
floating-point numbers
comparing
numbers too large or small for
poll results, calculating
precision of
rounding
flock( )
advisory locking with
nonblocking locks with
unlocking files
flush( )
Cache_DB class
flushing buffered data to file
fonts 
GD built-in
drawing centered text
2nd
graphical bar chart, use in
PostScript Type 1
drawing centered text
2nd
TrueType
drawing centered text
2nd
fopen( )
2nd
3rd
4th
default permission values
file handle for writing response headers to file
file modes
redirects, following
remote files
standard I/O streams, using with
2nd
stdin, opening
temporary files
username and password in URL
for loops 
hexadecimal numbers in
inverting to reverse array element order
iterating through arrays
iterating through file information array
iterating through LDAP address entries
using instead of range( )
forcing destruction of an object
forcing PEAR to overwrite a newer version
foreach loops
cycling through arrays and operating on elements
finding all combinations of array elements
finding array elements that meet certain requirements
iterating through arrays
merging arrays
sparsely filled arrays
format strings for binary data encoding
formatter-pdf program
formatting 
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dates and times
numbers
printing hexadecimal numbers
sprintf( ), using
time strings
forms
creating dropdown menus based on current date
elements with multiple options
handling remote variables with periods in names
multipage, working with
multiple submissions, preventing
processing input
redisplaying with preserved information and error messages
secure processing
uploaded files, processing
validating input
verifying with hashes in hidden fields
fpassthru( )
fputs( )
fread( )
2nd
3rd
FreeType library
2nd
3rd
French Republican calendar
converting to/from Julian Days
frenchtojd( )
fresh-links.php program
fseek( )
2nd
fsockopen( )
2nd
3rd
fstat( )
ftell( )
FTP
anonymous FTP
copying files between remote server and your computer
cURL extension, using with
downloading or uploading file to existing open file pointer
transferring files with
ftp_close( )
ftp_fget( )
ftp_fput( )
ftp_get( )
ftp_put( )
ftp_set_option( )
ftruncate( )
func_get_arg( )
func_num_args( )
function alias, _( ) for gettext( )
function keyword
function prototype 
accessing function parameters
assigning default values to parameters
function_defined( )
functions
calendar conversion
callback
[See callback functions] 
class constructor
DB
declarations, mixing with invocations
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declaring
directories, manipulating
DOM
drawing arcs and ellipses
dynamic, creating
encryption
ereg (extended regular expressions)
converting to preg
error handling
file information
FTP
global variables, accessing inside
gzipped files
helper (PHP), for XML-RPC
hyperbolic
interpolating within strings
mail, sending
mcrypt extension, supported by PHP
mean execution time per iteration
parameters 
accessing
named
passing by reference
setting default values
variable number of
pc_ in names
PHP, associating with XML-RPC methods
2nd
preg (Perl-compatible regular expressions)
processing array elements, handing off elements to
return values, skipping selected
returning failure from
returning localized messages
returning more than one value
returning values by reference
shell-execution, escaping characters appropriately
switch statement within
taking generic objects
trigonometric
variable, calling
wrapper, for debugging information
XML parsing
XML-RPC extension
fwrite( )
2nd
3rd
GCD (greatest common divisor)
GD library
2nd
[See also graphics] 
coordinates for images
features in different versions
file formats supported
fonts
transparent color
version 2.x, functions for arcs and ellipses
version and configuration, checking with phpinfo( )
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gdbm_reorganize( )
GET method
building query string for requests
fetching URLs with
redirecting users to another URL
retrieving remote file
get-crypt.php program
get_browser( )
get_cfg_var( )
get_class_methods( )
get_class_vars( )
get_elements_by_tagname( )
get_gmtime( )
get_html_translation_table( )
get_lock( )
get_object_vars( )
get_parent_class( )
get_time( )
getAll( ) (DB)
2nd
getAssoc( ) (DB)
2nd
getAuth( ) (Auth)
getChannelInfo( ) (XML_RSS)
getCol( ) (DB)
2nd
getdate( )
2nd
3rd
4th
getenv( )
gethostbyaddr( )
gethostbyname( )
gethostbynamel( )
getItems( ) (XML_RSS)
getMessage( ) (DB_Error)
getmicrotime( )
getmxrr( )
getOne( ) (DB)
2nd
getopt( ) (Console_Getopt)
Getopt_Error class
getProxy( ) (SOAP_WSDL)
getResponseBody( ) (HTTP_Request)
getResponseHeader( ) (HTTP_Request)
getResult( ) (DB)
getRow( ) (DB)
2nd
gettext extension
gettext( ) function alias
GIF support, removal from GD
global variables 
accessing inside functions
COMMAND_LINE
multiple function return values, using for
GlobalWeather web service
gmdate( )
2nd
gmmktime( )
2nd
GMP library
2nd
gmstrftime( )
2nd
GNU 
gettext utilities
Privacy Guard (GPG)
Readline library
go-pear script
Google 
SOAP objects
SOAP_WSDL objects
GPG (GNU Privacy Guard)
gradians
graphical user interfaces
[See GUIs] 
graphics
coordinates for images
destroying images
drawing arcs, ellipses, and circles
drawing centered text
GD built-in fonts
PostScript Type 1 fonts
TrueType fonts
drawing lines, rectangles, and polygons
drawing text
drawing with patterned lines
dynamic images
file format supported by GD
filled rectangle, creating
generating bar charts from poll results
image generation process
localizing images
pc_Image class
PNG image, writing with PHP
serving images securely
transparent color
greatest common divisor (GCD)
greedy matching
Gregorian calendar
[See also calendars] 
checkdate( ) dates
gregoriantojd( )
2nd
grid layout for widgets
grid_horizontal( )
group permissions
2nd
changing ownership of files
grouping characters for matching
GTK+, online documentation
gtk-weather.php program
gtk::main( )
gtk::main_quit( )
GtkButton class
GtkMenu class
GtkMenuBar class
GtkMenuItem class
GtkTable class
attach( )
GtkVBox class
GtkWindow class
GUIs (graphical user interfaces) 
responding to actions by users
widgets 
creating and displaying
displaying in a window
gunzip
gzcompress( )
gzencode( )
gzgets( )
gzip utility, compressing web output
gzipped files, reading and writing
gzopen( )
gzread( )
gzseek( )
gzuncompress( )
gzwrite( )
handler functions
error handling
property overloading
handles
[See file handles] 
hashes
[See also associative arrays] 
verifying data with
HEAD method
2nd
header( )
2nd
3rd
eliminating "headers already sent" errors
PNG image, sending to browser
headers 
HTTP 
"headers already sent" error message
Accept-Language
Content-Length
Content-type
2nd
3rd
Cookie
fetching URLs with
Host
Location
2nd
3rd
request
response
using with cURL extension
Window-target header
WWW-Authenticate header
mail
newsgroup messages
metainformation about postings
References header
headline or article syndication format in XML (RSS)
helper functions (PHP) for XML-RPC
heredocs 
initializing strings with
interpolating with
strings in
hexadecimal values
converting ASCII character codes to
escape sequences in double-quoted strings
hexdec( )
hidden form fields
hashes in
session tracking with
unique identifier in
hierarchy, class
high-precision time, generating
history of commands
HOME environment variable
horizontal columns in HTML table
horizontally aligned widgets
Host header
hostnames 
DNS lookups
for news servers
hosts 
finding all
pinging
HTML 
capturing text inside tags
color values, printing out
converting to/from ASCII
email containing
emphasized text, converting with <b> or <i> tags
escaping control characters from user data
escaping special characters in newsgroup messages
extracting links from file
highlighting search results
parsing, using nongreedy matching
printing array in horizontally columned
searching for image tag with regular expressions
Smarty templates for
tags, removing from string or file
transforming RSS feed to
Unix system logins formatted as table
XML vs.
HTML entities
2nd
3rd
URL encoding and
html_errors configuration variable
htmlentities( )
2nd
3rd
htmlspecialchars( )
2nd
3rd
HTTP 
basic authentication
debugging request/response cycle
exchanging information over with SOAP
headers
[See headers, HTTP] 
methods 
GET
2nd
3rd
4th
HEAD
2nd
POST
2nd
3rd
4th
5th
6th
mixing headers and body text in buffered output
proxy server, configuring PEAR to use with
reading files via
requests, stateless nature of
status codes 
ÒRequest-URI Too LongÓ (414)
program unable to retrieve URL
web page moved elsewhere (302)
HTTP_Request class
addHeader( ) method
2nd
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