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Index: E

each( )
array values and: 6.9.3. Discussion
sparsely filled arrays: 4.24.3. Discussion
using with list( ) and while loops for array iteration: 4.5.2. Solution
ECB (Electronic Code Book) mode: 14.8.3. Discussion
echo: 18.19.3. Discussion
elapsed time
between two dates: 3.6.1. Problem
execution time for each line of PHP code: 8.26.3. Discussion
since epoch, high precision times: 3.14.3. Discussion
Electronic Code Book (ECB) mode: 14.8.3. Discussion
elements
array (see arrays)
HTML, with multiple options (in forms): 9.11.1. Problem
XML
creating new for document: 12.3.3. Discussion
nodes: 12.3.3. Discussion
searching DOM tree for: 12.4.3. Discussion
ellipses, drawing: 15.3.2. Solution
filled: 15.3.3. Discussion
email
encrypting with GPG: 14.12.1. Problem
sending: 17.2.1. Problem
text addresses, converting to mailto: hyperlinks: 13.1. Introduction
web-based client for: 17.4.1. Problem
email addresses
comments embedded in: 13.6.3. Discussion
hiding from address-harvesting robots: 8.13.3. Discussion
matching valid with regular expressions: 13.6.1. Problem
"do not send" list: 17.2.3. Discussion
RFC 822-compliant address parser in IMAP extension: 13.6.3. Discussion
emphasized text, using <b> or <i> HTML tags: 18.17.3. Discussion
empty set: 4.25.3. Discussion
empty strings
assigning as default function parameter value: 6.3.3. Discussion
assigning to array elements: 4.6.3. Discussion
error messages: 6.3.3. Discussion
empty variables, unset variables as: 5.1. Introduction
enable-ftp: 17.7.3. Discussion
encoding
base64 encoding: 14.3.1. Problem
format strings for: 1.14.3. Discussion
HTML entities: 11.10.2. Solution
in HTML-formatted RSS item: 12.5.3. Discussion
pc_encode( ): 9.4.3. Discussion
URL: 8.9.2. Solution
variables and values into textual form: 5.8.2. Solution
encryption: 14.1. Introduction
checking password strength: 14.6.1. Problem
email, encrypting with GPG: 14.12.1. Problem
encrypting/decrypting data, algorithms for: 14.8.1. Problem
listing of mcrypt algorithms: 14.8.3. Discussion
keeping passwords out of site files: 14.2.1. Problem
lost passwords, dealing with: 14.7.1. Problem
mcrypt library: 14.1. Introduction
mhash module, hash algorithms: 14.4.3. Discussion
obscuring data with encoding: 14.3.1. Problem
one-way: 14.1. Introduction
sharing encrypted data with another web site: 14.10.1. Problem
SSL: 14.11.1. Problem
storing encrypted data in file or database: 14.9.1. Problem
storing passwords: 14.5.1. Problem
verifying data with hashes: 14.4.1. Problem
end-of-string identifier: 1.1. Introduction
end tags, PHP: 18.14.3. Discussion
end_element( ): 12.5.3. Discussion
entities, HTML: 8.9.3. Discussion
encoding: 11.10.2. Solution
encoding for HTML-formatted RSS item: 12.5.3. Discussion
encoding in user-entered data: 9.9.3. Discussion
$_ENV superglobal array: 8.21.3. Discussion
9.1. Introduction
environment variables
HOME and USER, setting for GPG: 14.12.3. Discussion
HTTP_USER_AGENT: 8.8.3. Discussion
LC_ALL: 16.4.3. Discussion
ORACLE_SID: 10.1. Introduction
reading: 8.21.1. Problem
setting: 8.22.1. Problem
storing passwords in: 14.2.2. Solution
epoch timestamps: 3.1. Introduction
19.2.3. Discussion
altering by amount of time zone's offset from UTC: 3.13.3. Discussion
converting human-readable date and time strings to: 3.10.2. Solution
converting Julian days to/from: 3.11.3. Discussion
converting to/from time and date parts: 3.3.1. Problem
cookies expiration times and: 8.2.3. Discussion
finding difference between: 3.6.2. Solution
localtime( ), use of: 3.2.3. Discussion
equality operator (==): 4.12.3. Discussion
ereg( ): 3.10.3. Discussion
ereg functions: 13.1. Introduction
converting to preg: 13.2.1. Problem
escaping metacharacters: 13.9.1. Problem
preg functions vs.: 13.1. Introduction
eregi( ) case-insensitive matching: 13.2.2. Solution
ereg_replace( ): 13.2.3. Discussion
error handling
custom error handler, using: 8.17.1. Problem
eliminating "headers already sent" errors: 8.19.1. Problem
error types, listing of: 8.16.3. Discussion
HTML errors, disabling: 8.24.3. Discussion
logging program errors: 8.18.1. Problem
_ _FILE_ _ and _ _LINE_ _ constants: 8.18.3. Discussion
reporting levels: 8.16.3. Discussion
tuning by altering error-logging sensitivity: 8.16.1. Problem
error messages
default or empty: 6.3.3. Discussion
hiding from users: 8.15.1. Problem
error_log( ): 8.18.2. Solution
error_reporting( ): 8.16.2. Solution
errors
database, logging: 10.11.1. Problem
classes for: 10.11.3. Discussion
functions with identical names: 6.1. Introduction
Getopt_Error class: 20.3.3. Discussion
logging: 6.11.3. Discussion
misspelling parameter names: 6.5.3. Discussion
standard error, reading from a program: 18.24.1. Problem
writing to standard error: 18.19.3. Discussion
escape sequences, string: 1.1. Introduction
escapeshellarg( ): 18.21.2. Solution
19.12.3. Discussion
escaping: 18.21.1. Problem
HTML entities: 8.9.3. Discussion
11.10.2. Solution
metacharacters in regular expressions: 13.9.1. Problem
quotes in query data: 10.10.1. Problem
regular expression pattern delimiters: 13.2.3. Discussion
SQL and shell globbing wildcards: 10.10.3. Discussion
user-entered data on HTML page: 9.9.1. Problem
European languages, characters for: 16.12.3. Discussion
E_USER_ERROR: 10.11.3. Discussion
E_USER_NOTICE: 10.11.3. Discussion
E_USER_WARNING: 10.11.3. Discussion
eval( ): 7.13.2. Solution
event-based parsing: 12.5.3. Discussion
Event Log (Windows NT): 8.15.3. Discussion
exclusive locks: 18.25.3. Discussion
execute( ): 10.7.3. Discussion
execute( ) (DB): 10.7.2. Solution
10.8.2. Solution
execute permission: 19.1. Introduction
executeMultiple( ) (DB): 10.8.3. Discussion
exp( ): 2.9.2. Solution
expat library: 12.5.3. Discussion
processing an RSS feed and transforming to HTML: 12.5.3. Discussion
WDDX, use with: 12.11.3. Discussion
expiration time for cookies: 8.2.3. Discussion
past, for deleting cookies: 8.4.2. Solution
explode( )
bar chart graphic, sizing lines: 15.10. Program: Generating Bar Charts from Poll Results
comma-separated data and: 1.10.3. Discussion
generating time parts with date: 3.5.3. Discussion
parsing hash from cookie value: 14.4.3. Discussion
splitting on strings instead of regular expressions: 13.10.3. Discussion
strings, breaking into pieces: 1.12.2. Solution
exponents: 2.3.3. Discussion
2.9.1. Problem
expressions
between { and }, evaluating: 5.5.3. Discussion
interpolating within strings: 1.8.1. Problem
extended regular expressions (see ereg functions regular expressions)
extending classes: 7.1. Introduction
extends keyword: 7.1. Introduction
extensions
DOM XML: 12.3.2. Solution
parsing XML: 12.4.2. Solution
encryption functions: 14.1. Introduction
FTP: 17.7.1. Problem
GD: 15.1. Introduction
15.1. Introduction
(see also GD library)
gettext: 16.11.1. Problem
getting configuration variables for: 8.23.3. Discussion
IMAP: 13.6.2. Solution
17.4.2. Solution
LDAP: 17.8.2. Solution
mcrypt: 14.8.2. Solution
PHP Extension and Application Repository (PEAR): 21.1. Introduction
PHP-GTK: 20.1. Introduction
20.6.3. Discussion
Readline: 20.4.2. Solution
WDDX: 12.11.2. Solution
XML: 12.1. Introduction
XML-RPC: 12.7.2. Solution
xmlrpc-epi: 12.7.2. Solution
XSLT: 12.6.2. Solution
zip: 18.27. Program: Unzip
zlib: 18.26.2. Solution
extensions, filename: 19.5.3. Discussion
external programs, running: 18.21.3. Discussion
passing input to: 18.22.1. Problem
ext/standard/parsedate.y: 3.10.3. Discussion


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