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426 - Robust checking of data entered by users
10 steps to testing the bullet proofing user inputs or how to avoid being caught by nasties when your script goes live! 1. Test it works with intended entries. It's not going to be much good if it falls over when someone entered a valid piece of data! 2. Test it works (fails correctly) with errone ....

425 - Caching an XML feed
If you're using PHP to add a newsfeed to your site, please be kind to the news feed supplier and cache the feed if your page is a popular one. I posted a couple of weeks ago ... a link to a piece of code that grabs a news feed .... and I've enhanced it now to do the caching. Here's the modified c ....

424 - How not to run a forum
I'm willing to invest time and energy into something I believe in, but I want to make sure that it's worth my while .... that I'm not wasting my time. I came across a local forum ... quite quiet, but nevertheless a useful and targeted spot onto which to post a message about a local issue; I filled ....

423 - A Victorian Lady
My Grandmother - "Gran" - would have been 112 today. She was born when Victoria was on the throne and when the professional classes lived in bigger houses and had servants to help with the running of the place. My early memories are of a sliding door to their kitchen in Ainsdale, Lancashire when my ....

422 - PHP Magic Quotes
Do you want to read a string from a form and save it into a database? "Easy" you might say ... and indeed it is ... but if you just take the exact characters that were entered into the form and embed them in your SQL, you're laying yourself open to an injection attack. That's where a user enters a ....

421 - Don't repeat code - use loops or functions
I've just answered a question about completing a whole series of radio boxes in a form, where the questioner provided sample code that had the same line, slightly modified, appearing time and time again. But if you find yourself repeating something, there must be an easier way and that way will be e ....

420 - Towards Tebay
I'm home ... three days in Edinburgh, 2 days in Cambridge, and I even have a one day course today in Melksham - such is how busy we are. I've been taking the opportunity to take some pictures ... we live on a beautiful island, and even some of the views from the motorways, such as this one here, are ....

419 - Most popular courses
Lunch question. "What's your most popular course?". I think I have a finger on our business, but that's a very difficult one to answer. We don't keep all of our eggs in one basket; no one subject accounts for more than a quarter of our business and no one client accounts for more than a tenth of o ....

418 - Difference between import and from in Python
Python's "import" loads a Python module into its own namespace, so that you have to add the module name followed by a dot in front of references to any names from the imported module that you refer to: import feathers duster = feathers.ostrich("South Africa") "from" loads a Python module into the ....

417 - Telephone Preference Service - we're registered
If you want to talk to us about a course, please call us. If you're a newcomer to Open Source or have a project you want to talk about - even if it's unlikely that you'll be wanting to be trained, please feel free to call. If you want to sell us a telephone service, holiday, double glazing, or a Ja ....

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