How to disable PHP OPCache for certain directories

Deactivate OPCache per folderIn this article, I want to show you how to disable the OPCache based caching for certain directories. (If you need a short introduction to the subject of OPCache, you should scroll down to the blue box in this article.) Although OPCache is a good idea in almost all cases, there are, as with many thing, situations where you should make an exception. Especially when it comes to the development or if a bugfix is to be tested, it can make sense to disable OPCache.
However, since other projects that benefit from OPCache are often running on the same web server, a complete deactivation of OPCache for such test cases can not be an option. Therefore, this article is about how to disable OPCache on the directory level.
In […]

How to install and configure Roundcube

 
how to install roundcubeToday we’ll be talking about installing the webmail client Roundcube on your website or web server. However, before we begin I’d like to say a few words about why a webmail client is a good idea in the first place and why I decided to use Roundcube. If you’re just interested in the installation procedure, you can skip directly to the next paragraph (“Basic requirements”).
Why install a webmail client? I can answer that question only for me and my specific case. I have several email addresses – one is a Gmail address and the others are addresses for my websites and blogs that all have the format @website-name.net.
So when I want to see my emails, I don’t want to open five different websites and three programs. I’d like for everything to be in one place. […]

Benchmark: strtotime() vs DateTime vs getTimestamp in PHP

Recently I wrote about how one can implement date comparison in PHP. In the article I presented two approaches. Firstly, using the strtotime() method and another with the DateTime class.
Then, in the comments on the german division of this blog, it was pointed out that the strtotime() variant is probably faster. Because I wasn’t sure about this, I decided to make a small performance test and share the results with you in this article.
How did I test the performance?

Since the question aims on strtotime() vs. DateTime, the DateTime class is contrary to the strtotime() function. So because DateTime class offers more functionality, I had first to create the DateTime object and then get the timestamp of it, because the strtotime function gives a timestamp as return value and I wanted to compare the time needed to generate the identical output.
As input I have taken a date without a custom time […]

How to compare dates in PHP

php_date_compareHow to actually compare 2 dates in PHP with each other? The question sounds easier than it is.  The first thought that usually comes is the following. We store both dates as strings and compare them.
Preliminary

<?php
$date1 = "2012-1-12";
$date2 = "2011-10-12";

if ($date1 > $date2)
echo "$date1 is newer than $date2";
else
echo "$date1 is older than $date2";
?>

Output:

2012-1-12 is newer than 2011-10-12

At first glance this seems to be a workable solution. But what if the two data is in a different format?

<?php
$date1 = "12-1-12";
$date2 = "2011-10-12";

if ($date1 > $date2)
echo "$date1 is newer than $date2";
else
echo "$date1 is older than $date2";
?>

Output:

12-1-12 is older than 2011-10-12

Now the date in 2012 is declared to be older than the date in 2011, which is of course wrong. However, from PHP’s point of view, this behavior is correct, because two […]