Download e-book for iPad: Advanced Php Programming: A Practical Guide to Developing by Gorg Schlossnagl

By Gorg Schlossnagl

ISBN-10: 0672325616

ISBN-13: 9780672325618

Over the last 3 years personal home page has developed from being a distinct segment language used so as to add dynamic performance to small websites to a robust software making robust inroads into large-scale, business-critical internet systems.The fast maturation of Hypertext Preprocessor has created a skeptical inhabitants of clients from extra conventional "enterprise" languages who query the readiness and skill of personal home page to scale, in addition to a wide inhabitants of personal home page builders with no formal laptop technology backgrounds who've discovered throughout the hands-on experimentation whereas constructing small and midsize purposes in PHP.While there are numerous books on studying personal home page and constructing small functions with it, there's a severe lack of knowledge on "scaling" personal home page for large-scale, business-critical platforms. Schlossnagle's complicated Hypertext Preprocessor Programming fills that void, demonstrating that Hypertext Preprocessor is prepared for firm net purposes by way of exhibiting the reader tips to improve PHP-based functions for max functionality, balance, and extensibility.

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These are the basic goals of API documentation: It should provide an introduction to the package or library so that end users can quickly decide whether it is relevant to their tasks. It should provide a complete listing of all public classes and functions, and it should describe both input and output parameters. It should provide a tutorial or usage examples to demonstrate explicitly how the code should be used. This is useful for keeping documentation up-to-date, and it ensures that the documentation is always present.

False && is_file($file)) { $retval[] = $file; } closedir($dir); return $retval; } Using all-uppercase for truly global variables and constants also allows you to easily spot when you might be globalizing a variable that you should not be globalizing. Using global variables is a big mistake in PHP. In general, globals are bad for the following reasons: n n They can be changed anywhere, making identifying the location of bugs difficult. They pollute the global namespace. If you use a global variable with a generic name such as $counter and you include a library that also uses a global variable $counter, each will clobber the other.

If you want to avoid a global here, you can use an accessor function with the global array in a static variable: function us_states() { static $us_states = array(‘Alabama’, ... , ‘Wyoming’); return $us_states; } This method has the additional benefit of making the source array immutable, as if it were set with define. Long-Lived Variables Long-lived variables should have concise but descriptive names. Descriptive names aid readability and make following variables over large sections of code easier.

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Advanced Php Programming: A Practical Guide to Developing Large-Scale Web Sites and Applications With Php 5 by Gorg Schlossnagl

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