Beginning PHP5 by Dan Squier, David Mercer, Allan Kent, Steven Nowicki, Clark

By Dan Squier, David Mercer, Allan Kent, Steven Nowicki, Clark Morgan, Wankyu Choi

PHP5 is the latest model of the popular language for quickly developing dynamic online page content material. whereas its major use is as a cross-platform, HTML-embedded, server-side net scripting language, it now works both good whilst developing multi-tiered functions or XML-based functions in addition to internet functions. This booklet teaches you the beneficial properties and performance of PHP5, from fitting and configuring it to designing and developing advanced data-driven sites. As you continue, you'll construct a few totally practical purposes. you will be brought to easy programming common sense, relational databases, OOP, PEAR, GTK, MSI, CLI, SQLite, and extra. if you find yourself complete, you'll know how to create, try, debug, and placed your purposes to paintings within the genuine international. What you'll study from this publication the basics of object-oriented programming in PHP5 tips to write PHP5 functions that run on home windows ;, Linux ;, Mac OS ; X, and different working platforms Why PHP5 works successfully in small to enterprise-level purposes errors dealing with with try/catch info manipulation in MySQL ; utilizing Hypertext Preprocessor how one can construct functional functions akin to an internet textual content editor, a web based electronic mail program, and an object-oriented touch supervisor program Command-line scripting and GUI program improvement powerful equipment of holding and organizing your code, and extra Who this ebook is for This publication is for starting programmers in addition to skilled builders who are looking to examine what's attainable with the most recent model of Hypertext Preprocessor.

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PHP Data Types Although PHP is loosely typed, it does support many common simple and structured data types. Simple data types are types that contain a range of values that can be ordered in one dimension (strings, numbers, Booleans, and so on), whereas structured data types include arrays and objects. PHP has eight simple types, which are described in the following table: Data type Boolean Integer Float 48 Description Scalar; either True or False Scalar; a whole number Scalar; a number which may have a decimal place Chapter 2: Writing Simple Programs Chapter 2: Writing Simple Programs String Array Object Resource NULL 49 Scalar; a series of characters Compound; an ordered map (contains names mapped to values) Compound; a type that may contain properties and methods Special; contains a reference to an external resource, such as a handler to an open file Special; may only contain NULL as a value, meaning the variable; explicitly does not contain any value Programmers use terms such as scalar, compound, and special to signify characteristics of data types.

How Online PHP Programs Run Unlike desktop applications, which run on your local system when their . exe file is activated, online PHP programs run when a request is made to the Web server. The request tries to get the Web server to retrieve and send the file requested, but before the response is composed, the PHP engine has a chance to process the PHP code in the file. This chapter discusses running online PHP programs. You can run PHP from the command line if you have access to the system on which it is installed, but that was well covered in Chapter 1.

The content of these three sections is dependent on whether the message is a request or a response, so you'll examine these two cases separately. The HTTP Request The HTTP request that the browser sends to the Web server contains a request line, a header, and a body. 1 The method is used to tell the server how to handle the request. The following table describes three of the most common methods that appear in this field. Method Description GET A request for information residing at a particular URL.

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