PHP will throw a “division by zero” warning (or exception) if your code attempts to divide a number by 0.

Fixing (and avoiding) the “Fatal error: Call to a member function on a non-object” error.

This is a PHP error that happens whenever you attempt to use a scalar value as an array.

In this article, we discuss why you should avoid mixing PHP and HTML.

This is a simple tutorial on how to download files with cURL in PHP.

This tutorial shows you how to use a custom user agent with the cURL functions in PHP.

This is a short guide on how to “fix” undefined index / offset errors in PHP.

This is a simple guide on how to check to see if session_start has already been called in PHP.

Pinging a website in PHP is pretty easy if you know how to use the function fsockopen.

This is a simple guide on how to expire user sessions in PHP after a set amount of time.

In this guide, we show you how to calculate the difference between two dates in PHP. We’ll also tell you how to convert it into other formats.

In this article, we look at at the fatal PHP error “class contains abstract methods”. We also give you tips on how to fix it.

This is a short guide on how to modify a JSON file with PHP.

A simple guide on how to handle cURL errors in PHP.

A simple guide on how to send JSON via a POST request in PHP

This is a simple guide on how to loop through the characters of a string in PHP.

A simple guide on how to print out values in a PHP multidimensional array.

As you probably already know, PHP has an array called $_SERVER, which contains information such as: The server name. The request method (whether the request is POST, GET or PUT, etc). The IP address of the user. The visitor’s user agent. It has also has an index called HTTP_REFERER, which should give you the address of […]

In this article, we are going to look at why resizing images on upload is better than dynamically resizing them “on the fly”.

In this guide, we are going to show you how to validate HTML forms using PHP.

One of the tricky things about being a web developer is that you are sometimes forced to accommodate visitors that use different measurement systems and formats. Currency symbols, date formats and measurement systems can all differ from one user to the next. The following PHP code snippets will help you to convert between some of […]

Simply put, there are no performance differences between using singles quotes or double quotes in PHP.

In this tutorial, we show you how to send a HEAD request using PHP and cURL. This is useful if you need to check if a remote file exists.

On more than one occasion, I’ve come across novice PHP developers looking for ways to redirect the user and their submitted form variables to an external website. More often than not, they’ll ask if they can somehow attach POST variables to a header redirect. After this fails and they finally realize that another solution is […]