![[ Image: Two Hip Characters ]](https://perishablepress.com/wp/wp-content/images/2007/misc-chunks/essential-characters.gif)
Virtually every article written here at Perishable Press requires at least one or two “special” HTML characters. Some of these characters — such as quotation marks, hyphens, and dashes — are very common, while others — such as the copyright symbol, bullet, and arrow — happen less frequently. The vast majority of special characters, however, like the latin Ä (i.e., capital letter “A” with a diaeresis), and the mathematical symbol ⊃ (i.e., superset), rarely see the light of day on […] Continue reading »
Recently, I needed to find and replace all instances of “http://website” in the wp_comments table of the WordPress database. Fortunately, SQL provides a simple way to find and replace data with its wonderful UPDATE function. Continue reading »
Recently, after researching comment links for an upcoming article, I realized that my default <input /> values were being submitted as the URL for all comments left without associated website information. During the most recent site redesign, I made the mistake of doing this in comments.php: … <input class="input" name="url" id="url" value="[website]" onfocus="this.select();" type="text" tabindex="3" size="44" maxlength="133" alt="website" /> … Notice the value="[website]" attribute? It seemed like a good idea at the time — I even threw in a nice […] Continue reading »
Not the most interesting title, but “oh well”.. Recently, a reader named Alison left a comment requesting help with a particular htaccess trick. She wanted to know how to permanently redirect (301) all requests for a specific page when requested from a specific IP address. In other words, when a visitor coming from 123.456.789 requests the page requested-page.html, the visitor will be redirected to just-for-you.html. All visitors not coming from that specific IP address are not redirected, and thus will […] Continue reading »
![[ Preload Images with CSS ]](https://perishablepress.com/wp/wp-content/images/2007/misc-chunks/preload-images-css.jpg)
Clean, easy, effective. You don’t need no stinking JavaScript to preload your images. Nope. Try some tasty CSS and (X)HTML instead! Here’s how to do it with only two easy steps.. Step 1 — Place this in your CSS file: div#preloaded-images { position: absolute; overflow: hidden; left: -9999px; top: -9999px; height: 1px; width: 1px; } Step 2 — Place this at the bottom of your (X)HTML document: <div id="preloaded-images"> <img src="https://perishablepress.com/image-01.png" width="1" height="1" alt="" /> <img src="https://perishablepress.com/image-02.png" width="1" height="1" alt="" […] Continue reading »
![[ Image: Human Head via Photographic Cubism ]](https://perishablepress.com/wp/wp-content/images/2007/misc-chunks/wrapped-head.jpg)
If you think you understand the logic behind Microsoft’s downlevel conditional comments, you are sadly mistaken. Sure, they seem simple enough on the surface, but as you really try to wrap your head around how and why they work, the subtle complexities of downlevel conditional comments may leave you dazed and confused… In our previous article on Internet Explorer’s exclusive browser-detection method, downlevel conditional comments (DCC), we present an introductory exposition, defining expressions and providing several generalized code examples. Overall, […] Continue reading »
For over a year now, I have been using Markus Kämmerer’s (Happy Arts Blog) WP-ShortStat plugin for WordPress. The plugin is relatively well-maintained and remains one of my favorite admin tools. Great for popping in on stats without logging into Mint. Nonetheless, due to its IP/country-detection functionality, WP-ShortStat has experienced its share of difficulties (e.g., read through the change log on the plugin’s home page). In this article, I describe how WP-Shortstat slows down the root index-page of a site, […] Continue reading »
![[ Image: Chain Linkage ]](https://perishablepress.com/wp/wp-content/images/2007/misc-chunks/symbolic-linkage.jpg)
On Unix systems, a symbolic link refers to a file that points to another file or directory. Symbolic links serve as powerful tools for web designers and developers. Using shell access, creating a symbolic link requires only one line of code: ln -s /home/username/public_html/directory1 /home/username/public_html/directory2 Simple enough. Assuming you have access to the linux shell. Unfortunately, many shared hosting environments deny shell access. Fortunately, creating symbolic links — also called “symlinks” — remains a possibility via the PHP symlink() function. […] Continue reading »
![[ Image: Abstracted Documents ]](https://perishablepress.com/wp/wp-content/images/2007/misc-chunks/abstracted-documents.jpg)
After studying Peter Kent’s excellent book, Search Engine Optimization for Dummies, several key methods emerged for optimizing websites for the search engines. Although the book is written for people who are new to the world of search engine optimization (SEO), many of the principles presented throughout the book remain important, fundamental practices even for the most advanced SEO-wizards. This article divulges these very useful SEO practices and organizes them into manageable chunks. Continue reading »
![[ Image: Fred Rogers with Shoe ]](https://perishablepress.com/wp/wp-content/images/2007/misc-chunks/mister-rogers.jpg "R.I.P. Mister Rogers (March 20, 1928 — February 27, 2003)")
The target attribute for anchor elements (<a></a>) specifies the location in which the referenced document should load. For example, to open a link in a new window, we would use a target value of _blank. Although this is a commonly employed technique, the target attribute has been deprecated by the W3C and is not valid (X)HTML. Regardless, the target element remains a useful tool for practicing designers and developers. Here, we present the attribute values for the target element: Continue reading »
First of all, congratulations if you are geeky enough to understand the title of this article. Many would be like, "CSS, MS.. IE, error ..what..?" Whatever. If you get the title, you will get the point of this utterly pointless exercise. If that is the case, prepare for a delightful romp through geekland. Otherwise, save your precious time and stop reading here (exit strategy). Continue reading »
This quick tutorial explains how to use HTML, JavaScript, and/or PHP to enable visitors to “go back” to the previous page. You can use either method to add a simple “go back” link or form button to your web pages. Continue reading »
In his excellent book, Search Engine Optimization for Dummies, Peter Kent explains that many search engines actually get their search results from one (or more) of the larger search engines, such as Google or The Open Directory Project. Therefore, the author concludes that it may not be necessary to spend endless hours registering with thousands of the smaller search sites. Rather, the author provides a brief list of absolutely essential search sites with which it is highly recommended to register. […] Continue reading »
URLs frequently employ potentially conflicting characters such as question marks, ampersands, and pound signs. Fortunately, it is possible to encode such characters via their escaped hexadecimal ASCII representations. For example, we would write ? as %3F. Here are a few more URL character codes (case-insensitive), for easy copy/paste reference. Continue reading »
This post contains random notes and code snippets for embedding QuickTime within HTML web pages. Simply copy, paste, and customize according to your needs. Happy embedding! Continue reading »
![[ Macromedia Flash ]](https://perishablepress.com/wp/wp-content/images/2007/misc-chunks/embed-fash-video-object.png)
Here is a collection of code snippets for embedding Flash and video using the HTML <object></object> tag. Useful for sites showcasing dynamic multimedia content. Continue reading »
