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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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