Technology Insights

PHP Script Using Exec Function & Launched From Crontab Hogging Server Memory

While working on a PHP script on a CentOS Linux server that runs from crontab I ran into an issue where PHP was bogging the server down because of memory use. The script has a lot of output that is not necessary to store though when using the exec function within the PHP script it was storing the unneeded output to an away which I believe was causing the memory usage problem. At first I thought I simply needed to modify the memory_limit setting within php.ini however that was not the true issue at hand. Below I describe two items to look at modifying if you run into a similar issue.

Technology Insights

Dell XPS 1340 Backlit Keyboard Not Working, Backlight On XPS 1340 Keyboard Not On

Awhile back I reinstalled Windows 7 on my Dell XPS 1340 because I wanted to make my computer faster and I definitely accomplished that goal. Couple nights ago I was working in a dark area and noticed that the backlight on the keyboard was not illuminated so I started to wonder if it had ever worked after the upgrade. Below is information on how to enable the backlight on a Dell XPS 1340 laptop.

Technology Insights

CentOS Linux: PHP Fatal error: Call to undefined function imagetypes()

After moving a WordPress site from one server to a brand new server I ran into an issue with one of the WordPress plugins called MM-Forms. The MM-Forms WordPress plugin allows you to easily create contact forms that will either email filled out forms to you, store those forms in the MySQL database, or both email you and store the results in the database. The issue was the fact that the contact form was not displaying on the page it was configured to display on. After digging around a bit I located the issue by looking in the Apache logs. The issue ended up being with the PHP function called imagetypes. Below I describe the actual error noticed in the Apache logs, the CentOS RPM package that will provide the PHP function that was missing, and the yum logs from installing the package.

Technology Insights

Use Notepad++ To Search For Variables In Documents, Notepad++ Reglar Expressions

I had a document the other day that I needed to search through on my Windows laptop and find specific number combinations that started with a specific three digits and ended with another digit. For example I had a list of thousands of numbers and needed to find any number that matched 333xxx4 where the xxx could be any number combination. At first I wasn’t sure what application I should use on Windows but then I remembered that Notepad++ had regular expression search and replace support. Below is an example of searching for the combination I mention above along with a list of other regular expressions that can be used for matching variables in documents opened with Notepad++.