Static vs Non-static methods in PHP: what is faster?

Posted by Stanislav Furman on May 4, 2014

Static vs Non-static methods in PHP: what is faster?

Some theory

As you know there are two types of methods in PHP classes: static and non-static. To be called a non-static method needs an instance of its class, and static method can be called without instantiating of the class. 

In the meantime there are two very common questions:

  • When to use non-static methods and when to use static methods?
  • Is there any performance difference between static and non-static methods?

These are very common dilemmas among PHP developers. Most of developers guess that static methods must work faster because there is no object instance with all its properties involved to the call. Sounds logical. Is that actually true?

As I already mentioned above, and as you already know, the main difference between static and non-static metods is that static methods do not need an instance of the class to be called in the code. It means that for static methods there is no need to create object and keep in the memory. So, at least we can save some memory which can also affect the performance? Hmmm... we'll see...

So, it's time to do some very simple experiments for further analysis.

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Apple has iWatch already in production, report says

Posted by Stanislav Furman on April 30, 2014

Apple has iWatch already in production, report says

According to China Times Apple has already started produciton of the long-rumored wearable computer watch known as the iWatch.

Apple has never officially announced a new wearable device characteristics. However, the company's CEO Tim Cook hinted that it would not be similar to "smart glasses" idea. According to media reports, the device will be have the look of an average dimension bracelet width of with color touchscreen.

It's been said that IWatch release was scheduled for the summer 2014, so it is more-llikely that some of the components for the gadget are ready. Components are typical for various devices such as MP3-players. However, this information is not sufficient to predict the shape of the future gadget.


Regular expressions? What's that?

Posted by Stanislav Furman on April 29, 2014

Apparently, the person who wrote this code has never heard about regular expressions. :)

<?php
$find = str_replace(",", "", $find);
$find = str_replace(".", "", $find);
$find = str_replace("/", "", $find);
$find = str_replace(" ", "", $find);
$find = str_replace("-", "", $find);
$find = str_replace("+", "", $find);
$find = str_replace("#", "", $find);
?>

Please, never repeat this! :)


IE users risk having their computers hacked and taken over

Posted by Stanislav Furman on April 28, 2014
Microsoft has announced that Internet Explorer users are are all vulnerable to a glitch

Unix shell commands to detect a DDoS attack and its source

Posted by Stanislav Furman on April 25, 2014

5 unix shell commands to detect a DDoS attack

Hello Coders!

In this article I'd like to show you a few handy Unix shell commands that would help you to detect if your server is (was) under DDoS/DoS attack. However, keep in mind, that protection from DDoS attacks is quite complex and if you are dealing with a massive DDoS attack, you would need to contact your IPS or Hosting Provider (i.e. 1&1) for assistance. 

So. What do we work with? We can do some analysis based on your Apache access log data. Assuming you have a standard Apache access log, and you are running your website on Unix. Let's now get the total number of requests per day:

## Get number of requests per day:


awk '{print $4}' access.log | cut -d: -f1 | uniq -c

This will display you a list the total number of HTTP requests per day. See if you have any unusual increses comparing to other days. Now see the total number of requests per hour for a specific date (April 25th in this example):

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This password is already in use. Old school security fail.

Posted by Stanislav Furman on April 23, 2014
Old school security fail.

RIP Nokia? Microsoft renames Nokia to Microsoft Mobile

Posted by Stanislav Furman on April 21, 2014

Nokia-reuters-624x351.jpg

There is a lot of sources saying that Microsoft will rename Nokia to Microsoft Mobile when the deal is closed. It is not officially confimed yet, but looks like it's going there.

Honestly, I don't get why would they make such a decision. Nokia is world-wide known brand. A very good brand.

Anyhow, RIP Nokia. It's sad to see how old good brands die.

Source


What Is the Heartbleed Encryption Bug?

Posted by Stanislav Furman on April 11, 2014

Redis: How to delete keys matching a pattern

Posted by Stanislav Furman on April 10, 2014
How to delete keys matching a wildcard pattern in Redis

Backward version compatibility in PHP web application

Posted by Stanislav Furman on February 17, 2014

If you develop a PHP web application which may be used on a web server with older PHP version, you can run into a situation when some of the PHP functions in your application won't work at all, or won't work as expected.

In fact, you can handle those situations if you want to. However, it can make you application code not as nice as you want and a little heavier.

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