Symbols & Numbers | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

Symbols

& (ampersand)

& (logical AND) operator: 8.16.3. Discussion

argument separator for URLs: 8.9.3. Discussion

before function name, returning values by reference: 6.7.2. Solution

before function parameter names, passing parameters by reference: 6.4.2. Solution

converting to HTML entity: 8.9.3. Discussion

9.9.3. Discussion

11.10.2. Solution

placeholder in database queries: 10.8.3. Discussion

< > (angle brackets)

>& (redirection) operator: 18.24.3. Discussion

< and >, converting to HTML entities: 8.9.3. Discussion

9.9.3. Discussion

11.10.2. Solution

<? and ?>, PHP start and end tags: 18.14.3. Discussion

programming conventions in this book: 0.4.1. Programming Conventions

<<< in heredocs: 1.1. Introduction

1.8.3. Discussion

* (asterisk)

regular expression metacharacter: 13.1. Introduction

SQL and shell globbing wildcard: 10.10.3. Discussion

@ (at sign) in PHPDoc commands: 21.9.2. Solution

/(backslash)

double-quoted string escape sequence: 1.1. Introduction

escaping for SQL: 10.1. Introduction

escaping regular expression pattern delimiters: 13.2.3. Discussion

escaping SQL and shell globbing wildcards: 10.10.3. Discussion

pathname separator on Windows: 18.1. Introduction

19.5.3. Discussion

{ } (braces)

array elements, resolving ambiguity about: 5.5.3. Discussion

dereferencing objects: 12.5.3. Discussion

in double-quoted strings: 1.1. Introduction

empty set: 4.25.3. Discussion

expressions between, evaluation in PHP: 5.5.3. Discussion

in variable interpolation: 17.4.3. Discussion

[ ] (brackets)

character classes in regular expressions: 13.1. Introduction

in double-quoted strings: 1.1. Introduction

variables, treating as arrays: 9.11.2. Solution

` (backtick) operator: 18.23.2. Solution

using with ls (Unix) or dir (Windows): 19.9.3. Discussion

^ (caret)

beginning of line anchor for patterns: 13.1. Introduction

inverting character class: 13.1. Introduction

:: (colon) operator, accessing class methods or member variables: 7.1. Introduction

, (comma)

array elements, separating: 4.10.1. Problem

data separated by, parsing: 1.10.1. Problem

$ (dollar sign)

$_ in superglobal array names: 9.1. Introduction

in double-quoted strings: 1.1. Introduction

end of line anchor for patterns: 13.1. Introduction

. (dot)

. (current directory) and .. (parent directory): 19.8.3. Discussion

in HTML field name, converting to PHP variable: 9.10.1. Problem

recreating full filename from parts: 19.5.3. Discussion

regular expression metacharacter: 13.1. Introduction

string concatenation operator: 1.8.2. Solution

= (equal sign)

= (assignment) operator, == vs.: 5.2.1. Problem

== (equality) operator: 4.12.3. Discussion

=== (identity) operator: 5.2.3. Discussion

=& (assignment) operator: 6.7.2. Solution

7.6.2. Solution

=> operator

instructing arrays to use different index: 4.2.2. Solution

specifying key/value pairs for arrays: 4.1. Introduction

| for alternation in pattern matching: 13.1. Introduction

-> operator, accessing methods or member variables: 7.1. Introduction

#! (hash-bang) syntax, PHP scripts beginning with: 20.1. Introduction

~ (logical NOT): 8.16.3. Discussion

!== (nonidentity) operator: 4.13.3. Discussion

19.8.3. Discussion

( ) (parentheses)

embedding comments in email addresses: 13.6.3. Discussion

grouping characters and capturing in patterns: 13.1. Introduction

% (percent sign)

SQL wildcard character: 10.10.3. Discussion

strftime( ), formatting characters preceded by: 3.5.3. Discussion

+ (plus sign)

+ operator, merging arrays: 4.8.3. Discussion

regular expression metacharacter: 13.1. Introduction

? (question mark)

?: (ternary) operator: 5.3.2. Solution

after quantifiers, for nongreedy matching: 13.5.2. Solution

placeholder in database queries: 10.8.3. Discussion

regular expression metacharacter: 13.1. Introduction

" (quotes, double)

converting to HTML entities: 8.9.3. Discussion

9.9.3. Discussion

11.10.2. Solution

in double-quoted strings: 1.1. Introduction

escaping for SQL: 10.1. Introduction

escaping in queried data: 10.10.2. Solution

in strings: 1.1. Introduction

variable interpolation in a double-quoted string: 17.4.3. Discussion

' (quotes, single)

escaping for SQL: 10.1. Introduction

in command-line arguments: 18.21.3. Discussion

in function return values: 6.10.3. Discussion

marking strings in queried data: 10.10.2. Solution

in strings: 1.1. Introduction

; (semicolon)

argument separator for URLs: 8.9.3. Discussion

end of statement character: 1.1. Introduction

/ (slash)

/** and */ in PHPDoc comments: 21.9.3. Discussion

pathname separator on Unix: 18.1. Introduction

19.5.3. Discussion

recreating full filename from parts: 19.5.3. Discussion

regular expression pattern delimiters: 13.1. Introduction

13.2.3. Discussion

_ (underscore)

_( ) alias for gettext( ): 16.11.3. Discussion

_ _FILE_ _ and _ _LINE_ _ constants: 8.18.3. Discussion

replacing . (dot) in variable names: 9.10.2. Solution

SQL wildcard character: 10.10.3. Discussion

Numbers

0 (zero)

as empty variable: 5.1. Introduction

numbers beginning with: 3.10.3. Discussion

return values from functions: 6.10.3. Discussion

in string escape sequences: 1.1. Introduction

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