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Web Dev + WordPress + Security
Tag: tricks
243 posts

WordPress Tip: Disable Comments in Old Posts via PHP

Just a quick WordPress snippet for future reference. I recently explained how to disable comments, pingbacks, and trackbacks via SQL. Here’s a good way to do it via PHP: <?php function close_comments( $posts ) { if ( !is_single() ) { return $posts; } if ( time() – strtotime( $posts[0]->post_date_gmt ) > ( 30 * 24 * 60 * 60 ) ) { $posts[0]->comment_status = 'closed'; $posts[0]->ping_status = 'closed'; } return $posts; } add_filter( 'the_posts', 'close_comments' ); ?> You can run […] Continue reading »

Working with Multiple Themes Outside of the WordPress Installation Directory

As you may observe, the WordPress installation that powers Perishable Press is located in a subdirectory named press. This configuration was intentional, as I wanted to have the option to easily install and maintain multiple versions of WordPress in variously named subdirectories. As much as I enjoy this flexibility, many would argue the SEO-related benefits of installing WordPress in your site’s root directory, or at least making it appear that way by using WordPress’ easily customizable “Blog Address” options setting. Continue reading »

Why Can’t I Log IN to My LinkedIn Account?

This is great. A couple of weeks ago I twittered that I had canceled my LinkedIn account. Without going into detail, suffice it to say that my original account signup information was no longer valid and the LinkedIn support staff was unable to even locate my account, let alone reset my password or provide login access. I know the account was there, but no matter what I tried I could not login. So, without being able to update my information, […] Continue reading »

Monitoring Internet Activity for Windows and macOS

Monitoring your computer’s Internet activity is a powerful tool, enabling you to: keep an eye on background processes reveal viruses and other malware expose unauthorized access monitor running programs log process activity ..and much more. The best part? It’s super-easy. Here’s how I do it on Win XP: Open the command prompt and type “netstat -n 5 > scan.txt” After a minute or two (or any amount of time), press Ctrl+C to stop monitoring Type “scan.txt” to open the log […] Continue reading »

Preventing the Unpredictable White Screen of Death for WordPress Sites with Multiple Themes

For the past several months and up until just recently, Perishable Press had been suffering from unpredictable episodes of the dreaded white screen of death. Although blank white screens happen to virtually all WordPress users now and then, certain configurations seem to trigger crashes more frequently than others. Here, I am referring to WordPress version 2.3. In this case, the unpredictable crashes, inconsistent errors, and general instability began several months ago after I had completed my WordPress theme restoration project. […] Continue reading »

A Way to Preload Images without JavaScript that is SO Much Better

Responding to my first attempt at preloading images without JavaScript, CSS-Guru David Bowman graces his audience with a most enlightening set of comments. Apparently, the image-preloading technique explained in the article is “major overkill” and “totally ridiculous.” Of course, I will be the first to admit that I am no expert in CSS, but I do enjoy sharing my discoveries and watching as people improve upon them. My first attempt at preloading images without JavaScript may indeed be “pretty crappy,” […] Continue reading »

3 Ways to Exclude Content from WordPress Feeds

This may surprise you, but I post quite a bit of content that never appears in the site’s main feed. It is my impression that a vast majority of subscribers are interested in web/graphic-design and development-related topics, and are really much less interested (if at all) in the miscellaneous odds and ends that wind up in the ever-expanding Perishable Press database. In the past, the process of excluding content from the main feed typically involved changing the post-date to something […] Continue reading »

Quick Reminder About Downlevel-Revealed Conditional Comments..

As more and more people discover the flexibility, specificity, and all-around usefulness of Microsoft’s proprietary downlevel conditional comments, it behooves us to reiterate the importance of utilizing proper syntax. Specifically, for downlevel-revealed, or negative, conditional comments, the commented content will remain visible unless the associated if condition proves false. Continue reading »

How to Cache Mint JavaScript

Recently, I spent some time addressing a few of the performance issues pointed out by Yahoo!’s very useful YSlow extension for Firebug. Working on performance tip #3, Add an Expires or a Cache-Control Header, I encountered some difficulty while trying to get the JavaScript used by Mint to cache as desired. Apparently, the HTAccess directives used to cache my other scripts do not effect the two PHP-generated JavaScript files used by Mint. Although I am not entirely certain, I suspect […] Continue reading »

Sharpen Your Site by Removing Unwanted Link Border Outlines

Lately I have noticed several sites that display those unsightly dotted outlines on high-profile link elements. Typically, these link outlines plague various header elements such as banner images, navigational links, and other key features. This behavior frequently haunts highly graphical site designs and is often associated with various image replacement methods that position the original anchor text offscreen, generally far beyond the left edge of the browser window. When visible, such presentations display a ghastly, four-sided dotted border that wraps […] Continue reading »

Blacklist Candidate Number 2008-05-31

Welcome to the Perishable Press “Blacklist Candidate” series. In this post, we continue our new tradition of exposing, humiliating and banishing spammers, crackers and other worthless scumbags.. Just under the wire! Even so, this month’s official Blacklist-Candidate article may be the last monthly installment of the series. Although additional BC articles may appear in the future, it is unlikely that they will continue as a regular monthly feature. Oh sure, I see the tears streaming down your face, but think […] Continue reading »

Toggle Element Visibility via JavaScript

Recently, while restoring the popular Jupiter! WordPress theme, which several readers use to “skin” the Perishable Press website, I found myself searching for a simple, effective JavaScript technique for toggling element visibility. Specifically, I needed to accomplish the following design goals: Continue reading »

Blacklist Candidate Number 2008-04-27

Welcome to the Perishable Press “Blacklist Candidate” series. In this post, we continue our new tradition of exposing, humiliating and banishing spammers, crackers and other worthless scumbags.. Since the implementation of my 2G Blacklist, I have enjoyed a significant decrease in the overall number and variety of site attacks. In fact, I had to time-travel back to March 1st just to find a candidate worthy of this month’s blacklist spotlight. I felt like Rod Roddy looking over the Price-is-Right audience […] Continue reading »

How to Block Proxy Servers via htaccess

Not too long ago, a reader going by the name of bjarbj78 asked about how to block proxy servers from accessing her website. Apparently, bjarbj78 had taken the time to compile a proxy blacklist of over 9,000 domains, only to discover afterwards that the formulated htaccess blacklisting strategy didn’t work as expected. Here is the ineffective htaccess directive that was used: Deny from proxydomain.com proxydomain2.com Blacklisting proxy servers by blocking individual domains seems like a futile exercise. Although there are […] Continue reading »

Drop-Dead Easy Random Images via PHP

Recently, while restoring my collection of Perishable Press themes, I needed a fast, effective way to randomize a series of images using PHP. After playing around with several possibilities, I devised the following drop-dead easy technique: Continue reading »

Pure CSS: Better Image Preloading without JavaScript

After reading my previous article on preloading images without JavaScript1, Nanda pointed out that adding extra markup to preload images is not the best approach, especially where Web Standards are concerned. Mobile devices, for example, may experience problems when dealing with the following preloading technique: /* ADD THIS TO CSS */ div#preloaded-images { position: absolute; overflow: hidden; left: -9999px; top: -9999px; height: 1px; width: 1px; } <!– ADD THIS TO XHTML –> <div id="preloaded-images"> <img src="https://perishablepress.com/image-01.png" width="1" height="1" alt="Image 01" […] Continue reading »

Welcome
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 more »
Digging Into WordPress: Take your WordPress skills to the next level.
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I live right next door to the absolute loudest car in town. And the owner loves to drive it.
8G Firewall now out of beta testing, ready for use on production sites.
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