PHP

This article outlines the PHP_SELF attribute of the $_SERVER system information variable and why you should never, ever use it. What is _$SERVER? Check out our full article on $_SERVER here – but in short, it’s a variable containing an array with information about your PHP environment – including server… Read More »PHP_SELF – What It Is, and Why It’s Too Dangerous to Use [WARNING]

This article will explain what the $_SERVER superglobal variable is in the PHP programming language. What is a ‘Superglobal’ Variable? A superglobal variable is a variable that is available to all scripts in all scopes in PHP. It is available from within any file, class, or function. What… Read More »What is the $_SERVER Superglobal Variable in PHP?

Here’s a quick trick for validating JSON in PHP – with a reusable function, you can copy and paste it into your own project. JSON has pretty much become the standard format for transferring data between applications on the internet. So if you’re building an… Read More »A Trick for Validating JSON in PHP

This easy tutorial will show you how to use the PHP empty() function to check whether a variable can be considered empty and show some code examples. What Is Empty? A variable is considered empty in PHP if its value equates to FALSE or the variable does not exist. This means that the… Read More »How to Use the PHP empty() Function

This article will explain (in the simplest terms possible) what modulus and modulo mean and how they are calculated in the PHP programming language. Modulus and Modulo are NOT the Same Things! There’s a bit of confusion about this, and it seems that in some places, the terms… Read More »Modulus (Mod), Modulo and PHP – Explanation and Code Examples

This tutorial will show you the best way to compare dates in the PHP programming language – and provide code examples. It’s essential to be able to accurately compare dates when building your app. For example, you may wish to compare dates for reporting purposes… Read More »How to Compare Dates in PHP, With Examples

This short article will explain the PHP exit function and how it is used to quit/exit/terminate a PHP script. PHP exit Function Syntax The syntax for the PHP exit function is as follows: exit(STATUS) Note that: exit will terminate the execution of the script at the point it is called… Read More »Using the PHP ‘exit’ (AKA ‘die’) Function to Terminate your Script [Examples]

This tutorial will show you how to use the PHP strstr() function to search and return a portion of a string, with examples. What is the strstr() Function For? The strstr() function searches a string and returns the matching portion of the string and everything that follows or precedes it. If… Read More »How to Use the PHP *strstr()* Function to Search a String

This article will show you how to round numbers in PHP with the round() function, including rounding to the nearest integer or a set number of decimal places. Why Round Numbers? There are various reasons you may want to round numbers. You don’t need incredible accuracy for… Read More »How to Round Numbers (Integer, Decimals) in PHP with the round() Function

This article will show you how to process a PHP array using array_map() to run a function on each item in the array. Why use array_map()? Arrays store a sequence of values in a single variable. If you’re storing those values, you probably want to do something with them at… Read More »PHP: Process Each Item In An Array with array_map() [Examples]