Variables History in PHP
Variables in PHP give you access to memory storage in a part of a computer called RAM, or random access memory. RAM is a volatile medium for storing information. That is, it all disappears when you shut off the machine. The computer sees this memory as a long array of memory cells that reside in sequential addresses. In PHP, however, you cannot actually get to memory at this level.
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PHP Data Types
PHP has eight different types of values, or data types. The first five are basic: integers, floating-point numbers, strings, Boolean, and null.Others are composed of the basic types, otherwise known as composite types. These include arrays,objects discussed in upcoming tutorials. Additionally, the resource type denotes a non-native type, such as an open file or a database connection.
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Hardware and Software Requirements
One great advantage of Open Source software is that it provides the opportunity for adaptation to new environments. This is true of PHP. Although originally intended as a module for the Apache Web server, PHP has since abstracted its Web server interface.
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How PHP Works with the Web Server
Web server will simply find the file, tell the browser to expect some HTML text, and then send the contents of the file. The browser gets the contents and begins rendering the page based on the HTML code. If you have been programming HTML for any length of time, this will be clear to you. Hopefully, you have also had some experience with CGI scripts.
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Origins of PHP
PHP began life as a simple way to track visitors to Rasmus Lerdorfs resume. It also could embed SQL queries in Web pages. But as often happens on the Web, admirers quickly asked for their own copies. As a proponent of the Internets ethic of sharing, and as a generally agreeable person, Rasmus unleashed upon an unsuspecting Web his Personal Home Page Tools version 1.0.
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wordwrap function in php
PHP wordwrap function returns a string wrapped at the column number specified by the optional width parameter. The line is broken using the break parameter which is optional. I've attached demo and example with this tutorial. So that, You can easily learn and understood about wordwrap function. Enjoy!
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vfprintf function in php
Write a string produced according to format to the stream resource specified by handle. format is described in the documentation for sprintf(). Operates as fprintf() but accepts an array of arguments, rather than a variable number of arguments.
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