PHP

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Count and display number of WordPress users in your Dashboard

Often when a WordPress site is compromised, the website owner doesn’t notice anything strange at first. First a lot of users are created, and it’s only later when posts filled with spam are created or existing pages/posts edited. In the time between compromise and creation of spam posts, a website owner might notice an increased number of users. If he has the means to. And that’s what this little plugin does.

Increase WordPress’ memory limit WP_MEMORY_LIMIT properly in wp-config.php

How to increase the memory limit for your WordPress website, the right way. The WordPress memory limit can be increased by the WP_MEMORY_LIMIT variable in wp-config.php. However, I see this done wrong over and over again in WordPress plugins and themes. In a worst case scenario this may even decrease the available amount of memory for WordPress! So be careful with the advice you follow. In this post I show you a correct way of setting WordPress WP_MEMORY_LIMIT and PHP memory_limit settings.

Remove Jetpack email sharing service

Recently the WordPress Jetpack email sharing service is often abused by spammers. They use the Send to Email Address for sending spam. All these kind of “Tell a Friend” scripts are abused a lot. Here is how to disable email share service in Jetpack.

Check WordPress Core files integrity

Check and verify WordPress Core files md5 checksums against WordPress’ checksums API, using this standalone PHP file. WordPress integrity matters, therefore I chose to use a standalone PHP script to check the md5sum of WordPress Core files against the API so you’re not dependent on a possibly hacked WordPress installation. This kind of guarantees the result can be trusted, as opposed to using a WordPress plugin. I think this is a better integrity check of WordPress Core files.

The WinCache effect: Save with object caching

WinCache, or Windows Cache Extension for PHP, is a PHP accelerator that is used to significantly increase the speed of PHP applications running on Windows Server IIS. Besides increasing the speed of PHP applications, WinCache decreases CPU usage making it a win win situation extension.

Benchmarking WordPress, simple load & speed testing with ApacheBench

Here is how to load test WordPress with ApacheBench. ab is a small benchmark utility that comes with Apache. It’s a really simple HTTP load generating tool, ideal for a simple WordPress load & speed test. How fast does your WordPress site respond? How many HTTP requests per second can your server handle? These are questions on which ab can shed some light.

Measure WordPress loading time and queries

How to measure WordPress’ loading time and executed database queries? During an HTTP request, WordPress executes a lot of queries on your MySQL database. Not just the database queries take time, also loading and executing PHP takes time.

“How we broke PHP, hacked Pornhub and earned $20,000”

This is a very interesting read on how Dario Weißer (@haxonaut), cutz and Ruslan Habalov (@evonide) were able to find a PHP unserialize bug to exploit and gain remote code execution on Pornhub. Pornhub’s bug bounty program is at Hackerone. Instead of actively attacking Pornhub, they took another road and attacked what Pornhub is built upon: PHP.

How to install Microsoft’s SQL Server Driver for PHP

In this article I’ll show you how to install the Microsoft SQL Server Driver for PHP 7+. This makes the use of an SQL Server database back-end for your PHP website easy. This post walks you through the steps necessary to install the SQL Server driver and SQLSRV extension for PHP 7+, on Windows Server IIS of course.

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