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PHP Tutorial

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The PHP Hypertext Preprocessor (PHP) is a programming language that allows web developers to create dynamic content that interacts with databases. PHP is basically used for developing web based software applications. This tutorial helps you to build your base with PHP. This tutorial is designed for PHP programmers who are completely unaware of PHP concepts but they have basic understanding on computer programming. Table of Contents : 1) PHP Installation Considerations . 2) Installation of PHP 3) Basic Syntax 4) Data Type
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Float

Home  >> Data Types   >> Float Float Floating point numbers (also known as "floats", "doubles", or "real numbers") can be specified using any of the following syntaxes: <?php $a  =  1.234 ;  $b  =  1.2e3 ;  $c  =  7E-10 ; ?> Formally LNUM          [0-9]+ DNUM          ([0-9]*[\.]{LNUM}) | ({LNUM}[\.][0-9]*) EXPONENT_DNUM [+-]?(({LNUM} | {DNUM}) [eE][+-]? {LNUM}) The size of a float is platform-dependent, although a maximum of ~1.8e308 with a precision of roughly 14 decimal digits is a common value (the 64 bit IEEE format). Floating point precision Floating point numbers have limited precision. Although it depends on the system, PHP typically uses the IEEE 754 double precision format, which will give a maximum relative error due to rounding in the order of 1.11e-16. Non elementary arithmetic ...
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Installation on Unix systems

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Home  >> Installation of PHP  >>Installation on Unix Systems Installing PHP on Unix System is now become so easy because of the software bundle (LAMP)  LAMP can be installed in two ways 1) GUI Mode LAMP refers to Linux + Apache + MySQL + PHP so installing these will give you an LAMP server, to install that easily you can use tasksel which you can install by opening a terminal ( ctrl + alt + t ) and do: sudo apt-get install tasksel After that is done call tasksel with sudo rights sudo tasksel Which will show you a window similar to the one in following screen-shot: Move your selector to the LAMP entry and press space to mark it, then press tab to highlight the <ok> field and press return. This starts the installation process. 2) Command Line Mode: As pointed out by the GUI window tasksel is not necessarily needed to do the lamp-server installation you can as well do it by simply en...
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