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Index: Symbols & Numbers

& (ampersand)

&= (bitwise AND assignment) operator: 2.4.12.2. Assignment with operation

& (bitwise AND) operator: 2.4.9. Bitwise Operators

converting to HTML entity: 4.5.1.1. Entity-quoting all special characters

indicating passing by reference: 3.4.2. Passing Parameters by Reference

> (angle bracket, right)

converting to HTML entity: 4.5.1.1. Entity-quoting all special characters

greater than operator: 2.4.8. Comparison Operators

> (greater than) operator

in string comparisons: 4.6.1. Exact Comparisons

>= (greater than or equal to) operator: 2.4.8. Comparison Operators

in string comparisons: 4.6.1. Exact Comparisons

>> (right shift) operator: 2.4.9. Bitwise Operators

< (angle bracket, left)

converting to HTML entity: 4.5.1.1. Entity-quoting all special characters

< (less than) operator: 2.4.8. Comparison Operators

in string comparisons: 4.6.1. Exact Comparisons

<= (less than or equal to) operator: 2.4.8. Comparison Operators

in string comparisons: 4.6.1. Exact Comparisons

<< (left shift) operator: 2.4.9. Bitwise Operators

<<< (heredoc identifier): 4.1.4. Here Documents

< > (angle brackets)

as pattern delimiters: 4.10.1. Delimiters

(inequality) operator: 2.4.8. Comparison Operators

[ ] (brackets)

as pattern delimiters: 4.10.1. Delimiters

[[\:>\:]] end of word anchor in regular expressions: 4.9.2. Anchors

in regular expression character classes: 4.8.2. Character Classes

{ } (curly braces)

{{{ and }}} sequences in comments: 14.3.4. Fleshing Out the Skeleton

as pattern delimiters: 4.10.1. Delimiters

enclosing array lookup in: 5.4. Multidimensional Arrays

in code blocks: 2.1.2. Statements and Semicolons

2.5.1. if

variable interpolation in strings: 4.1.1. Variable Interpolation

- (hyphen)

-> construct, accessing properties and methods: 2.2.6. Objects

6.3. Accessing Properties and Methods

defining character range in regular expressions: 4.8.2. Character Classes

inline pattern matching options, turning off: 4.10.9. Inline Options

- (minus sign)

-- (autodecrement) operator: 2.4.7. Autoincrement and Autodecrement Operators

- (arithmetic negation) operator: 2.4.5. Arithmetic Operators

-= (subtraction assignment) operator: 2.4.12.2. Assignment with operation

- (subtraction) operator: 2.4.5. Arithmetic Operators

for right-justified strings: 4.2.3.1. Format modifiers

( ) (parentheses)

as pattern delimiters: 4.10.1. Delimiters

grouping operands for precedence: 2.4.2. Operator Precedence

grouping patterns in regular expressions: 4.8.5. Subpatterns

non-capturing groups: 4.10.6. Non-Capturing Groups

* (asterisk)

*= (multiplication assignment) operator: 2.4.12.2. Assignment with operation

* (multiplication) operator: 2.4.5. Arithmetic Operators

in greedy and non-greedy quantifiers: 4.10.5. Quantifiers and Greed

@ (at sign), error suppression operator: 2.4.13. Miscellaneous Operators

\ (backslash)

escaping

in lookbehind pattern assertions: 4.10.10. Lookahead and Lookbehind

in single-quoted strings: 4.1.2. Single-Quoted Strings

regular expression metacharacters: 4.8.1. The Basics

in SQL queries: 4.5.3. SQL

removing from escaped strings: A.3d. Alphabetical Listing of PHP Functions (r-z)

` (backtick) operator: 2.4.13. Miscellaneous Operators

security risks of: 12.7. Shell Commands

24-bit color: 9.3. Basic Graphics Concepts

[] (brackets), [[\:<\:]] start of word anchor in regular expressions: 4.9.2. Anchors

^ (caret)

^= (bitwise XOR assignment) operator: 2.4.12.2. Assignment with operation

^ (bitwise XOR) operator: 2.4.9. Bitwise Operators

negating regular expression character classes: 4.8.2. Character Classes

start of line anchor, Perl regular expressions: 4.10.4. Anchors

start of string anchor in regular expressions: 4.8.1. The Basics

4.9.2. Anchors

: (colon), ending if line: 2.5.1. if

, (comma)

ASCII value for: 4.7.4. String-Searching Functions

two or more, skipping array values in list( ): 5.5. Extracting Multiple Values

$ (dollar sign)

in regular expressions: 4.8.1. The Basics

4.9.2. Anchors

4.10.2. Match Behavior

4.10.4. Anchors

in variable names: 2.1.6.1. Variable names

2.3. Variables

. (dot)

.+ (concatenation assignment) operator: 2.4.12.2. Assignment with operation

. (string concatenation) operator: 2.4.6. String Concatenation Operator

in cookie names, decoding: 7.6.1. Cookies

in HTML field names, converting for PHP variables: 7.4.2. Parameters

single-character matches in regular expressions: 4.8.1. The Basics

wildcard match character: 4.10.2. Match Behavior

= (equal sign)

=> symbol, separating array indexes from values: 5.3. Storing Data in Arrays

= (equals sign)

= (assignment) operator: 2.4.12.1. Assignment

== (equal to) operator: 2.2.3. Strings

2.4.8. Comparison Operators

comparing strings with: 4.6.1. Exact Comparisons

=== (identity) operator: 2.4.8. Comparison Operators

comparing strings with: 4.6.1. Exact Comparisons

testing return value for failure: 4.7.4. String-Searching Functions

! (exclamation point)

!= (inequality) operator: 2.4.8. Comparison Operators

!== (not identical) operator: 2.4.8. Comparison Operators

type specification modifier: 14.7. Parameter Handling

# (hash marks) in comments: 2.1.4.1. Shell-style comments

% (percent sign)

%= (modulus assignment) operator: 2.4.12.2. Assignment with operation

% (modulus) operator: 2.4.5. Arithmetic Operators

in format string to printf( ): 4.2.3. printf( )

+ (plus sign)

+= (addition assignment) operator: 2.4.12.2. Assignment with operation

+ (addition) operator: 2.4.5. Arithmetic Operators

+ (arithmetic assertion) operator: 2.4.5. Arithmetic Operators

++ (autoincrement) operator: 2.4.7. Autoincrement and Autodecrement Operators

in greedy and non-greedy quantifiers: 4.10.5. Quantifiers and Greed

printing positive numbers with: 4.2.3.1. Format modifiers

spaces, encoding in URLs: 4.5.2.2. Query-string encoding

9.6. Dynamically Generated Buttons

? (question mark)

?\: (conditional) operator: 2.4.13. Miscellaneous Operators

2.5.1. if

in non-greedy quantifiers: 4.10.5. Quantifiers and Greed

placeholder in database queries: 8.4.1. Placeholders

replacing characters outside target encoding: 11.3.6.1. Character encoding

" (quotes, double)

double-quoted strings

escape sequences in: 2.2.3. Strings

variable interpolation in: 4.1.1. Variable Interpolation

HTML entity for: 4.5.1.1. Entity-quoting all special characters

in heredocs: 4.1.4. Here Documents

in SQL queries: 4.5.3. SQL

in string literals: 2.2.3. Strings

' (quotes, single)

HTML entity for: 4.5.1.1. Entity-quoting all special characters

in heredocs: 4.1.4. Here Documents

in SQL queries: 4.5.3. SQL

in string literals: 2.2.3. Strings

escape sequences in: 2.2.3. Strings

single-quoted strings: 4.1.2. Single-Quoted Strings

; (semicolon)

after terminating heredoc identifier: 4.1.4. Here Documents

before PHP closing tag: 2.1.2. Statements and Semicolons

in PHP statements: 2.1.2. Statements and Semicolons

/ (slash)

/* */, in multiline C-style comments: 2.1.4.3. C comments

/= (division assignment) operator: 2.4.12.2. Assignment with operation

/ (division) operator: 2.4.5. Arithmetic Operators

//, in C++-style comments: 2.1.4.2. C++ comments

type specification modifier: 14.7. Parameter Handling

~ (tilde), bitwise negation operator: 2.4.9. Bitwise Operators

_ (underscore)

_ _ , method names beginning with: 6.4.1. Declaring Methods

converting dots (.) in cookie names to: 7.6.1. Cookies

converting dots (.) in HTML field names to: 7.4.2. Parameters

| (vertical bar)

|= (bitwise OR assignment) operator: 2.4.12.2. Assignment with operation

| (bitwise OR) operator: 2.4.9. Bitwise Operators

alternatives, in regular expressions: 4.8.3. Alternatives

type specification modifier: 14.7. Parameter Handling

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