Stopping spambots from submitting forms
Demonstrates a technique for preventing spambots from submitting forms, using questions such as "which day comes after tuesday?" or "spell the number 7 in lowercase letters ".
Static Free Energy (Zend)
This tutorial will show you how to produce static html pages using PHP. This is important if you want the benefits of using PHP to build sections of a site where the content of the pages doesn't change very often.
SQL Injection [Chris Shiflett: Security Corner]
Most Web applications interact with a database, and the data stored therein frequently originates from users. Thus, when creating an SQL statement, a developer may use client data in its construction. This article explains SQL injection by looking at a few example attacks and then introducing some simple and effective methods for prevention. By applying these best practices, you can practically eliminate SQL injection from your list of security concerns.
SimplePHP
Windows Installation Guide for Apache + PHP + MySQL + PHPMyAdmin.
Simple Linear Regression With PHP
In contrast with other open source languages like Perl and Python, PHP lacks a robust community effort to develop a math library. This article provides an example of a PHP math library called SimpleLinearRegression that demonstrates a general approach that can be used to develop PHP math libraries.
Simple Classes Introduction
By the end of this tutorial, you'll have a better understanding of what classes are and what they are good for. Classes can be very powerful when used right and can save you a lot of work (and typing) in the long run.
Serving XHTML with the correct mime type using PHP
Describes how to send XHTML with the correct mime type safely using PHP. Includes the ability to "fall back" to HTML if the viewing web-browser does not support XHTML.
Search Engine-Friendly URLs (Website Publisher)
Article describes three ways to make your URLs search engine friendly using PHP.
Saving Resources with phpCache (Website Publisher)
Tutorial explains how to implement the phpCache script and use it to keep your database server load low.
Programming PHP
A wikibook about programming in PHP. Also provides external links for more information.
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