Index
A note on the digital index
A link in an index entry is displayed as the section title in which that entry appears. Because some sections have multiple index markers, it is not unusual for an entry to have several links to the same section. Clicking on any link will take you directly to the place in the text in which the marker appears.
Symbols
- ! exclamation mark, Command completion and history
- ! NOT (Perl), Conditional Statements
- != (Perl), Mathematical Operators
- != (PHP), Conditional Statements, Conditional Statements
- !== (PHP), Conditional Statements
- $ (PHP), Language Basics
- $connection (PHP), Preventing SQL Injection Attacks
- $DBI::errstr, Handling Errors When Interacting with the Database
- $ref, Binding Query Results to Variables
- $result string (Perl), The Perl CGI Module
- $_COOKIE (PHP), The PHP Predefined Superglobal Variables
- $_GET (PHP), Introducing PHP, Processing and Using User Data
- $_POST (PHP), Processing and Using User Data
- $_SERVER (PHP), The PHP Predefined Superglobal Variables
- $_SESSION (PHP), The PHP Predefined Superglobal Variables
- % (Perl), Mathematical Operators, Arrays and Hashes
- && (Perl), Conditional Statements
- * (Perl), Mathematical Operators
- + (Perl), Mathematical Operators
- ++ (Perl), Mathematical Operators, Control Structures: Loops and Conditionals
- - (Perl), Mathematical Operators
- -- (Perl), Mathematical Operators
- ->, Connecting to the MySQL Server and Database
- / (Perl), Mathematical Operators
- < (Perl), Mathematical Operators
- < (PHP), Conditional Statements
- <= (Perl), Mathematical ...
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