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Index: V

validating

credit-card numbers with Luhn checksum: 4.9.3.1. Matching

forms: 7.4.9. Form Validation

var_dump( ) function: A.3d. Alphabetical Listing of PHP Functions (r-z)

displaying PHP values in human-readable form: 4.2.4. print_r( ) and var_dump( )

variable argument list, processing: 14.7.3. An Example with Variable Argument List

variable functions: 3.6. Variable Functions

variables: 2.2.6. Objects

2.3. Variables

assigning values to: 2.4.12.1. Assignment

case-sensitivity in names: 2.1.1. Case Sensitivity

checking value with isset( ) function: A.2b. Alphabetical Listing of PHP Functions (f-i)

checking values with isset( ) function: 2.3.4. Garbage Collection

configuration, getting: A.2b. Alphabetical Listing of PHP Functions (f-i)

converting HTML field names to: 7.4.2. Parameters

converting to/from arrays: 5.6. Converting Between Arrays and Variables

creating for extensions: 14.11. Creating Variables

defined, getting: A.2b. Alphabetical Listing of PHP Functions (f-i)

EGPCS (environment, GET, POST, cookie and server): 7.2. Variables

12.1.2. Set variables_order

EGPCS (environment, GET, POST, cookies and server): 7.2. Variables

expanding in double-quoted strings: 2.2.3. Strings

function parameters: 2.3.3.4. Function parameters

functions for: A.1. PHP Functions by Category

global

form data and, security issues: 12.1. Global Variables and Form Data

internal PHP, accessing from extension functions: 14.10. Global Variables

SAPI (Server Abstraction API): 14.10.1. SAPI Globals (SG)

interpolating into strings: 4.1.1. Variable Interpolation

mapping names to value positions in memory: 2.3.4. Garbage Collection

names, $ (dollar sign) in: 2.1.6.1. Variable names

NULL value: 2.2.8. NULL

object references: 6.2. Creating an Object

outputting information about: A.3d. Alphabetical Listing of PHP Functions (r-z)

passing by reference: 3.4.2. Passing Parameters by Reference

passing by value: 3.4.1. Passing Parameters by Value

$PHP_SELF: 7.2. Variables

property names, using with: 6.3. Accessing Properties and Methods

references to variable stored in another variable: 2.3.1. Variable Variables

removing value with unset( ) function: 2.3.4. Garbage Collection

request, importing into global scope: A.2b. Alphabetical Listing of PHP Functions (f-i)

scope of: 2.3.3. Variable Scope

3.3. Variable Scope

session, registering: 7.6.2. Sessions

7.6.2.1. Session basics

setting value of: 2.3. Variables

static: 2.3.3.3. Static variables

3.3.2. Static Variables

syslog, defining: A.2a. Alphabetical Listing of PHP Functions (a-e)

this: 6.4.1. Declaring Methods

variable, using with objects: 6.2. Creating an Object

variables_order directive in php.ini: 12.1.2. Set variables_order

VARIANT type: 15.3.2. PHP Functions

VBScript, converting to PHP COM function calls: 15.3.2. PHP Functions

Verisign Payflow Pro extension: B.1. Optional Extensions Listing

version

of PHP parser: A.2c. Alphabetical Listing of PHP Functions (j-q)

of XML in processing instruction: 11.1. Lightning Guide to XML

version_compare( ) function: A.3d. Alphabetical Listing of PHP Functions (r-z)

vpopmail extension: B.1. Optional Extensions Listing

vprintf( ) function: A.3d. Alphabetical Listing of PHP Functions (r-z)

vsprintf( ) function: A.3d. Alphabetical Listing of PHP Functions (r-z)

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