SEO / Webmaster

Various guides and articles that you might find interesting if you’re a webmaster.

Incorrect validation certificate for tls-sni-01 challenge.

The other day, I came across a frustrating issue while attempting to renew the Let’s Encrypt SSL certificate on my haproxy load balancer.

PHP: Send POST request WITHOUT cURL.

This is a short PHP tutorial on how to send a HTTP POST request without using cURL.

Fixing “Uncaught error: Call to undefined function curl_init”

This is a common error that occurs whenever PHP’s curl extension has not been installed or enabled.

PHP: Get a list of included PHP files.

This is a PHP tutorial on how to get a list of files that have been included in your script.

Call to undefined function mysql_connect()

If you are encountering this undefined error, then it means that you are trying to use the old mysql_* functions in PHP 7.

Secure PHP logout script.

This is a short PHP tutorial on how to create a simple user logout script that guards against CSRF attacks.

PHP: Detect if operating system is Windows.

This is a PHP tutorial on how to check if the operating system is Windows.

Linux: Delete files older than 30 days.

This is a short guide on how to use the Linux find utility to remove old files.

MySQL: INT(11) vs TINYINT(1) – What do the numbers in brackets mean?

When it comes to columns such as INT (11) and TINYINT (3), the number in brackets isn’t actually that important.

Force HTTPS with HAProxy.

This is a short tutorial on how to force HTTPS / SSL with the HAProxy load balancer.

SSL with HAProxy and PHP: Forwarding HTTPS header.

A short guide on how to forward HTTPS headers with HAProxy so that PHP knows what protocol is being used.

Submit PHP form to new tab / page.

This is a short and sweet tutorial on how to submit a PHP form (or any HTML form, for that matter) to a new tab using HTML’s target attribute.

PHP: Redirect HTTP to HTTPS.

This is a guide on how to force users to use your PHP application with HTTPS instead of HTTP.

Fix: index.php not being loaded by default.

In this article, we will show you how to solve the issue of index.php files not being served as the default file.

Stop JavaScript from being cached.

How to stop web browsers from caching your JavaScript files.

SQL Server: “The password of the account has expired.”

User passwords on SQL Server will expire by default. To disable this, you will need to untick the expiration checkbox.

Stop! This is a browser feature intended for developers.

This is a warning message that appears in the developer console while browsing Facebook.

Fix: PHP is being displayed in the browser.

Fixing the issue with PHP being displayed in the browser.

How to detect AdBlock users.

In this tutorial, we will show you how to detect AdBlock users with JavaScript. This can be done with a few lines of code.

How to modify the “data-ad-format” attribute for Google Adsense.

This Adsense unit is perfect if you have a responsive design and are worried that an ad will mess with the layout of your website.