![[ Image: Solar Eclipse ]](https://perishablepress.com/wp/wp-content/images/2007/misc-chunks/blacklist-eclipse.jpg)
For those of us running Apache, htaccess rewrite rules provide an excellent way to block spammers, scrapers, and other scumbags easily and effectively. While there are many htaccess tricks involving blocking domains, preventing access, and redirecting traffic, Apache’s mod_rewrite module enables us to target bad agents by testing the user-agent string against a predefined blacklist of unwanted visitors. Any matches are immediately and quietly denied access. 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 »
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 »
![[ 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 »
Behold the seventh wonder of the virtual world: max/min-height and max/min-width properties are possible in Internet Explorer! Indeed, by taking advantage of IE’s proprietary CSS attribute, expression, you too can whip IE widths and heights into desirable proportions. The CSS expression attribute enables JavaScript commands to be executed within Internet Explorer. JavaScript via CSS? Thanks, Microsoft! Continue reading »
In our previous article on creating spamless email links via JavaScript, the presented method, although relatively simple to implement, is not the most effective solution available. Spambots, email harvesters, and other online scumbags relentlessly advance their scanning technology, perpetually rendering obsolete yesterday’s methods. Continue reading »
Hiding and filtering CSS rules for specifically targeted browsers is often a foregone conclusion when it comes to cross-browser design considerations. Rather than dive into some lengthy dialogue concerning the myriad situations and implications of such design hackery, our current scheduling restraints behoove us to simply cut to the chase and dish the goods. Having said that, we now consider this post a perpetually evolving repository of CSS filters.. Continue reading »
By using an <iframe></iframe> within a <div></div>, it is possible to include external web content in most any web document. This method serves as an excellent alternative to actual frames, which are not as flexible and definitely not as popular. Indeed, with CSS, the placement, sizing, and styling of div’s provides endless possibilities for embedding external or even internal web content into pages that would otherwise require the use of frames, Flash, or JavaScript. This method works on any modern […] Continue reading »
After digging through the WordPress source code, I stumbled upon this very useful JavaScript method for auto-focusing form elements upon page load. Here is the JavaScript code (place within the document head): Continue reading »
Roll your own Apache Rewrite log! Rocking your own rewrite log is super-helpful for testing .htaccess rewrite rules, WordPress Permalinks, and much more. All you need is Apache 2.2 (or previous), mod_rewrite enabled (very common on most servers), and access to your server configuration file, http.conf. Continue reading »
![[ WordPress Triple Loop ]](https://perishablepress.com/wp/wp-content/images/2006/misc-chunks/wordpress-triple-loop.jpg)
Two of the themes developed by Perishable Press, Apathy and Information, depend on three WordPress loops to operate as intended. For each of these themes, the three loops consist of two “side” loops and one main loop. The side loops each display posts from one specific category, while the main loop displays posts from every category not specified in the side loops. Continue reading »
Consider this post an evolving receptacle for Firefox-specific CSS tricks. Continue reading »
Gravatars have become a popular way of adding spice to the “comments” page of many WordPress-powered sites. So popular, in fact, that the gravatar server is often overloaded, bogged down with millions of gravatar requests every second. This immense server load effects user pages everywhere, resulting in slow loading times, unresolved server requests, and missing gravatars. Such broken presentations appear unprofessional, tarnish reputations, and may provoke confusion. This article provides essential solutions for an extreme gravatar makeover.. Continue reading »
Welcome to Perishable Press! This article explains several methods for opening multiple frames with a single link. For more excellent HTML information, check out the HTML category archive. If you like what you see, I encourage you to subscribe to Perishable Press for a periodic dose of online enlightenment ;) Continue reading »
Search engine optimization (SEO) is the business of every serious webmaster. The process of optimizing a website for the search engines involves much more than properly constructed document headers and anchor tags. Websites are like trees: their roots are the growing collection of content presented through the branching universe of the World Wide Web. Or something. The point is that optimizing a website requires nurturing the site itself while also ensuring proper exposure to the requisite elements of the internet. Continue reading »
Perishable Press is operated by Jeff Starr, a professional web developer and book author with two decades of experience.
Here you will find posts about web development, WordPress, security, and 