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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.
Conditional probability -- the probability of observing one event as a result of having observed another event -- is a potentially important factor in designing intelligent Web applications. Paul Meagher introduces Bayesian inference by discussing the basic mathematical concepts involved and demonstrating how to implement the underlying conditional probability calculations using PHP.
3 lessons: In the first installment of this three-lesson tutorial, our Kiwi guide covers everything you need to know to begin developing database hubs... Lesson 2 covers more PHP/MySQL goodies than you could probably imagine. Graeme starts by showing while loops, then talks about the ever-useful if-else statement... In Lesson 3, Graeme shows some of the secrets that will turn your simple data-driven site into a useful application. As he covers validation, he'll show how to prevent users from leaving key form fields blank and how to make sure numeric files don't contain letters. He'll also teach you how PHP handles includes and functions.
Simple PHP MySQL Tutorial with examples like creating a guestbook, contact form, uploading files to database, creating a simple Content Management System (CMS), etc.
A basic PHP tutorial for beginners. It includes printing, variables, constants, math, strings, files, functions, arrays, and several other key points of PHP.