New PDF release: Pro PHP Patterns, Frameworks, Testing and More

By Kevin McArthur

ISBN-10: 1430202793

ISBN-13: 9781430202790

ISBN-10: 1590598199

ISBN-13: 9781590598191

Pro Hypertext Preprocessor offers skilled builders with a radical consultant to the language's key complex positive aspects, targeting either contemporary and rising gains and improvement tendencies. complicated object-oriented positive aspects, documentation, debugging, software program styles, and the normal Hypertext Preprocessor Library are only many of the subject matters lined in wide aspect. writer and famous personal home page professional Kevin McArthur additionally examines rising practices and tendencies comparable to the MVC structure as utilized to personal home page, with distinctive emphasis positioned upon the more and more well known Zend Framework. The ebook additionally covers JSON, the cleaning soap extension, and complicated net providers topics.

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Additional resources for Pro PHP Patterns, Frameworks, Testing and More

Example text

Listing 4-4 demonstrates how to create this logging method. fm Page 36 Friday, February 1, 2008 10:25 AM 36 CH APT ER 4 ■ EXCE PT I ON S Listing 4-4. php. You can then use LoggedException in place of Exception in all your invocations or custom exceptions. This will log all exceptions, even those that are caught. This is not always desirable, as you may wish to log only exceptions that were not caught or that were rethrown by a catch block. In these cases, you will want to use the PHP function set_exception_handler(), as described in the next section.

Fm Page 26 Friday, February 1, 2008 10:24 AM 26 CHAPTER 3 ■ SINGLETON AND FA CTORY PATTERNS public function getHeight() { return $this->_height; } public function getData() { return $this->_data; } } class ImageFactory { public static function factory($file) { $pathParts = pathinfo($file); switch(strtolower($pathParts['extension'])) { case 'jpg': $ret = new Image_JPEG($file); break; case 'png'; $ret = new Image_PNG($file); break; default: //Problem } if($ret instanceof IImage) { return $ret; } else { //Problem } } } Now, when you use the factory method with your image file name, you will get a different object depending on what type of file you pass in.

Once an exception is thrown, instead of completing the function, the execution jumps to the catch block, where the application is told to echo the error message. Extending Exceptions Nonspecialized exceptions are great, but exceptions can be so much better. In Listing 4-1, it would be much more useful if you could examine why the database connection failed. To be able to get this information, you need to integrate Exception with the appropriate function. For example, pg_last_error() provides the reason for a PostgreSQL error.

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Pro PHP Patterns, Frameworks, Testing and More by Kevin McArthur


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