Writing PHP

By Neil Williams
2007-11-11

Common PHP functions

Introduction to PHP functions.

PHP has a host of ready-made functions to make complex tasks easier. Only the common functions can be covered on CodeHelp, including arrays, date and time, mysql and strings. Other functions are already covered in passing during discussion of errors, tainted data, forms and files. For a full description of these and all the other PHP functions, one of the PHP texts is recommended. Functions are available in the following areas:

Apache-specific
Arrays
Aspell
Calendar
Class/Object
Client URL Library
Databases - including
- Database Abstration Layer
- dBase
- DBM
- Informix
- InterBase
- Microsoft SQL Server
- mSQL
- MySQL
- Unified ODBC
- Oracle 8
- Oracle
- PostgreSQL
- Sybase
Date and Time
Directory
DOM XML
Error handling and logging
Filesystem
Forms Data Format document
HTTP functions
Images
Mail
Mathematics
Miscellaneous
Network
Output Control
PHP Options
POSIX
Program Execution
Pspell
Perl-compatible
Regular expressions
Sessions
Strings
URL
User defined functions
Variables
WDDX
XML Parser
Zlib

Tutorial Pages:
» What can PHP do?
» PHP output
» PHP and HTTP: headers and variables
» No need for CGI access
» Preventing and solving bugs in PHP
» Checking user input for dubious or erroneous values
» Read remote files, read and write local files on the server
» Common PHP functions
» Building, sorting, reversing and flipping arrays
» Current time, date calculations, timestamp formats
» PHP string functions

Copyright © Neil Williams

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