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Taking tutorial submissions! Please email them to dave[AT]icemelon[DOT]com for review. Thanks!
Latest Tutorials IceMelon IM: Add IM Functionality to phpBB [Misc] Want to add site-wide member IM to your phpBB community? Sure you do. Simple step-by-step instructions inside. IceMelon IM: Add IM Functionality to vBulletin [Misc] Want to add site-wide member IM to your vBulletin community? Simple step-by-step instructions inside. Crawl Your Site for PageRanks [PHP] So you know your site has a PageRank of 8. What about the PRs of all the inner pages? This tutorial will teach how you to automate the process of grabbing all these PRs. Create CAPTCHA images [PHP] Worried about bots? Then create CAPTCHA images to prevent bots from taking advantage of your site. Convert SHN and FLAC files to MP3 [Misc] Low on disk space and have an insensitive ear? Here are some steps to converting SHN and FLAC files to MP3 format. [View All] Become a sponsor for $15/month. Link is sitewide - PR5 homepage, 20+ PR4 pages, 90+ PR3 pages. Email dave[AT]icemelon[D0T]c0m. |
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Create Your Own BBCode By dave
Online forums (message boards, bulletin boards, or whatever you wanna call them) often support BBCode. Not sure what I'm talking about? Here's an example:
[url=http://www.nutang.com]NuTang Weblog Community[/url] Should be converted to.. <a href="http://www.nutang.com">NuTang Weblog Community</a> In this tutorial, I'll teach how, using PHP, you can parse a block of text and convert the BBCode into HTML. The function in the spotlight here is preg_replace. To fully understand its use, you should be familiar with regular expressions. If you aren't, just skim my regular expressions tutorial [http://www.icemelon.com/tutorials/1/Regular_Expressions.htm]. First, let's lay down a few assumptions. I'll assume the text you wanna parse is stored in the variable $stuff. Now, let's just get down to the code: // convert [url=URL]link_title[/url] $pattern[] = '/\[url=(.*?)\](.*?)\[\/url\]/i'; $replace[] = '<a href="$1">$2</a>'; // convert [url]url_link[/url] $pattern[] = '/\[url\](.*?)\[\/url\]/i'; $replace[] = '<a href="$1">$1</a>'; // convert [img]image_link[/img] $pattern[] = '/\[img\](.*?)\[\/img\]/i'; $replace[] = '<img src="$1">'; // convert [b]text[/b] $pattern[] = '/\[b\](.*?)\[\/b\]/i'; $replace[] = '<b>$1</b>'; // convert [code]CODE[/code] $pattern[] = '/\[code\](.*?)\[\/code\]/i'; $replace[] = '<xmp>$1</xmp>'; $html = preg_replace($pattern, $replace, $stuff); The above code supports the following BBCode tags: [url], [img], [code], & [b]. Let's just go over one example, because as you can see, they're all variations of the same structure. Let's look at [b], which converts text to be boldfaced: // convert [b]text[/b] preg_match('/\[b\](.*?)\[\/b\]/i', '<b>$1</b>', $stuff); Remember, stuff that fits the expression within the parentheses will be stored in $1 (then $2, $3, etc., if applicable). In the above example, we only have one set of parentheses, so we only need to worry about $1. The $1 will store the text to be boldfaced. Further note, a lot of characters need to be escaped (using '\'). (Again, check out details about the function here: preg_replace).Questions Speaking of str_replace, you should use this function to convert your smilies. For instance: // converts ;-) to a wink-smilie $html = str_replace(';-)', '<img src=images/smilies/wink.gif>', $html); More Related Functions Okay, I think I've run out of things to say. It's a wrap! P.S. Check out my new site TheManWhoSoldtheWeb.com, where I publish guides and scripts on Internet Marketing and SEO. Here is a limited time freebie: the Rapid Google Indexer. |
