SitePoint PHP Blog: The Joy of Regular Expressions [1]
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Sometimes, it's just not enough to sit and try to teach theory about something in programming - it's better to just jump right in and take things as they come. That's what Harry Fuecks thinks, at least in his latest post on the SitePoint PHP Blog - a look at the "Joy of Regular Expressions".   He does go over a bit of the theory and why they are so invaluable, but it's a short section before he gets to the heart of the article - working with regular expressions for:  positive matching matching all instances in a given string finding an exact match matching the start of a string validation of the contents of a string checking the length of a string  There's simple examples included for each of the items to help you get an idea of how they'd work.
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Gareth Heyes has posted another challenge to his blog - this time it involves using a regular expression to convert the inputted string into the output he's given.   After the success of my "a bit of fun" challenge, a few people asked for some more challenges. So I was answering a question on a mailing list that I'm a member of and I thought it would be a good topic for a little challenge and help sharpen everyone's regular expression skills.   This time, his challenge involves taking the input, rail start/end locations from an array and, via the PHP script given (no regular expression in it, of course) make the output, a sort of JSON formatted message. It's already been answered, but if you want to, try it yourself first then read the answer below the post.
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Though it contains no code, this new article on PHPBuilder provides a good perspective for those looking to get into PHP and what to expect to find.   A couple of months ago, I knew almost nothing about PHP, only that is was a programming language that I needed to learn. Today, my whole site relies upon PHP and I have gained the confidence that almost anything is possible using PHP. I accomplished this achievement using methods that I will describe in this article.   The author talks about the methods followed to get into the language, including making smaller goals at first, just to get used to things. The manual is also suggested as a "best friend" for a developer and looking at other people's code can provide insight into your problems.
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P&aacute;draic Brady has a suggestion for all of the PHP readers out there - two articles in the latest edition of php|architect magazine, the May 2007 edition:   The two that stick in my mind are Jim Delahunt's "Unicode and PHP: A Gentle Introduction" and Jeff Moore's "Test Pattern: Model View Controller". Both are something those seeking illumination on these topics should certainly read.   The first presents an introduction to one of the hottest topics in the PHP world - Unicoding - including a few same scripts to get you going. The second article, a look at the Model/View/Controller pattern that really gets more to what the pattern is about rather than just talking about its structure.
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DevShed has posted the last part of their latest series, a look at using the Prototype pattern in a PHP5 application, Building a Data Validation System with the Prototype Pattern with PHP 5.   Taking into account that this pattern can be helpful in situations where a prototype object is required, along with other clones of it, in this final installment of the series I'm going to demonstrate how to use it to build a simple application for checking the validity of incoming data.   They create a simple validation system with the pattern to check and see if the inputted data is either alpha only or alpha-numeric. On top of this, they create some additional classes to check the data for things like being a valid email address or if the value is made up of all numbers.
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Popular posts from PHPDeveloper.org for the past week:PHP-Coding-Practices.com: Try-Catch Syntax WeirdnessPHPBuilder.com: Cross-Platform Database PHP DevelopmentIBM developerWorks: Java and PHP technology on AIX - Integrate the Java business application w/ DB2OpenSourceCommunity.org: What do you think makes a good CMS?Jonathan Snook's Blog: Elemental: Conditional Content with CakePHPDevShed: The Basics of Using the Factory Pattern in PHP 5Builder.com.au: PHP exploit code plants itself in GIFJohn Cox's Blog:  Linux.com Now PHP PoweredNick Halstead's Blog: Solving Programming ProblemsPHP-Tools Blog: Testing FIT
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Popular posts from PHPDeveloper.org for the past week:Dave Dash's Blog: nginx and symfonyZend Developer Zone: The ZendCon Sessions Episode 6: Project Management Methods to Maintain IT StandSitePoint PHP Blog: Tokenization using regular expression sub patternsIT Jobs Watch: Results for PHP Developers in LondonJob Posting: Digital River Seeks PHP Developer (Eden Prairie, MN)Dan Scott's Blog: Oooh...looks like I've got (even more) work cut out for meLeon Chevalier's Blog: Improve website load time by 500% with 3 lines of codePHPWomen.org: elePHPantsPhil Thompson's Blog: 7 PHP functions that saved my lifeStuart Herbert's Blog: Using suphp To Secure A Shared Server
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From the RefreshinglyBlue blog, there's a new post that makes a comparison between two of the most popular web scripting languages - PHP and Ruby - on a practical, basic level.   There are rather significant syntactical differences between PHP and Ruby. For example PHP requires semicolons at the end of lines and generally requires curly brackets to enclose blocks of code. Ruby, on the other hand, uses newline characters to denote the end of a line of code...   The post goes through other differences like: value return methods, function/method naming, similarities between them, frameworks, namespaces, documentation and hosting options.
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Here's what was popular in the PHP community one year ago today:onPHP5.com: Clickable, Obfuscated Email AddressesJacob Santos' Blog: PHP BlackjackThe Bakery: RESTful Web Services With CakePHPDeveloper.com: Developing a Ajax-driven Shopping Cart with PHP and PrototypeGreg Beaver's Blog: Mac OS X ships with security hole-laden PEAR - how to upgrade immediatelyNexen.net: English Articles and a Single Distribution ResourceJob Posting: Red Ventures Seeks Several LAMP Developers (Charlotte, NC)The Bakery: Checking for duplicate records (unique record)DevShed: The Basics of Abstract Factory Classes in PHP 5NewsForge.com: A DIY calendar control in PHPDevGuide.net: Dynamic Bitmap Graphics with PHP and GDRichard Heyes' Blog: Browser DetectionInternational PHP Magazine: Poll Question: Which is the Most Important Feature of PHP 5?Builder.au: Dynamic XML document construction with the PHP DOMCommunity News: PEAR Version 1.5.0 Released
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On his blog, Ian Bicking has posted some of his thoughts on a positive look at PHP - what he thinks PHP has done right.   With the recent talk on the blogosphere about deployment (and for Django, and lots of other posts too), people are thinking about PHP a bit more analytically. I think people mostly get it wrong.   He points out that PHP, in essence, is a CGI-style execution and, in being so, makes it more flexible. Both sides, web and command line, can work with the language equally well. He also mentions the developer/administrator split he sees in PHP's structure and how the language facilitates it.
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DevShed has posted the second and last part of a series of two articles based around the Composite design pattern - using it to work with strings in PHP5.   Are you a PHP developer who wants to improve your skills in pattern-based programming in PHP? If the answer to this question is a emphatic yes, then you should begin reading this article now! Welcome to the final part of the series "Implementing the composite pattern with PHP 5." Comprised of two instructive tutorials, this series walks you through the basic concepts of this important design pattern, and shows you how to apply it with some educational examples.   They start by defining a simple StringProcessor class as an abstract interface to build from. From there, they create two other classes - the SingleStringProcessor and the MultipleStringProcessor. Each of these takes in either a single file or multiple filenames and spits back out the value of the string and the length of the string.
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On the PHP in Action Blog, there's a new post today that shares some tips for testing your web applications with some simple tests.   I just started listing the techniques I've learned when writing tests to exercise the web interface of a PHP application. This is from my experience and my personal preferences; it's not the final word or necessarily right for everyone.  He suggests:  Use SimpleTest's Web tester if you can Test the web output using regular expressions Use element IDs or names to test links, forms and fields Log HTTP requests in the application
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In his travels as a PHP developer, Jamie Wong has gathered some helpful debugging tips that are shared in this latest post to his blog.   Here are some bugfixing rules and tips Iâve learned working all these years with PHP. I emphasize mostly on fixing bugs than preventing them, which is another subject worth of its own article. Iâve moved to Rails, but I wanted to finish this post as a farewell and thanks to every article and documentation that was useful to me. Hope this is useful to you too.   Topics covered include:  Assume nothing Turn Error Reporting to show all errors Read the error message Understand the bug "Scooby-Bug, where are you?" Get as much information as possible  Each has some explanation below it and, in some places, a bit of code to clarify the point.
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In this post to his blog, Chris Shiflett talks about some issues surrounding character encoding and the cross-site scripting issues it can open up in your application.    In the post [on Good and Bad PHP Code], he provides a few useful PHP interview questions, including some questions from Yahoo. He explains that good PHP code should be Structured, Consistent, Portable and Secure   In the comments, many additional improvements have been suggested, but there's one that has yet to be mentioned. When using htmlspecialchars() without specifying the character encoding, XSS attacks that use UTF-7 are possible.    Included in the post is an example to illustrate the point as well as a solution, a simple one involving the header() function, to help correct the problem and prevent bad things from happening.   Be sure to check out http://shiflett.org/blog/2007/may/character-encoding-and-xss#comments">the comments for more great tips.
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In a new post on his blog, Kore Nordmann takes a look at a feature that's been around a long time (first introduced in a message board application) - BBCodes.   The discussion on my blog post "Do not use regular expressions for parsing" ended in a discussion about BBcodes in general. I just used them as an example to demonstrate why it it is impossible to parse such a language with regular expressions - and mentioned in a subclause, that I don't see any sense in using them at all.   He looks at some of the myths surrounding them and their use (more secure, easier to use, safer than HTML) and gives some reasons for making teh choice of HTML over them.
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Popular posts from PHPDeveloper.org for the past week:The Bakery: Six New Articles/Tutorials PostedEvert Pot's Blog: PHP: Arrays vs. ObjectsDevArticles: Learning AJAXInternet Super Hero: PHP: mysqli_fetch_all()David Coallier's Blog: PHP Namespaces (Part 1: Basic usage & gotchas)I/O Reader: 15 Cool Things & 12 Things to Dislike About PHPProPHP Podcast: Newscast - August 16, 2007PHPBuilder.com: Dynamic XML with PHPSite News: Popular Posts for the Week of 08.17.2007PRADO Watch Blog: PRADO Watch: Interview With Timani Tunduwani - Why I Moved From CakePHP to PRADO