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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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