Learning PHP 5

Index

A note on the digital index

A link in an index entry is displayed as the section title in which that entry appears. Because some sections have multiple index markers, it is not unusual for an entry to have several links to the same section. Clicking on any link will take you directly to the place in the text in which the marker appears.

Symbols

!= not-equal operator, Building Complicated Decisions

# (hash mark), comments in PHP programs, Comments

$ (dollar sign) anchor, Anchors

$GLOBALS array, Understanding Variable Scope–Understanding Variable Scope

$php_errormsg global variable, Checking for Errors

$_COOKIE auto-global array, Working with Cookies

$_FILES auto-global array, Uploading Files in Forms

$_GET auto-global array, Accessing Form Parameters

$_POST auto-global array, PHP in Action, Making Web Forms, Accessing Form Parameters

changing values in, Numeric or String Elements

default values for forms, displaying, Displaying Default Values

encrypted passwords and, Login and User Identification

hidden parameters in, Form Processing with Functions

validating numeric and string elements, Numeric or String Elements

$_SERVER auto-global array, Making Web Forms

elements in, Useful Server Variables

$_SESSION auto-global array, Storing and Retrieving Information

saving form data in a session, Storing and Retrieving Information

unset( ) and, Login and User Identification

% (percent sign)

modulus division operator, Arithmetic Operators, Looping Through Arrays

SQL wildcard, Retrieving Form Data Safely