Code

Code examples for languages such as PHP and JavaScript.

PHP: Create directory based on current date.

This is a PHP tutorial on how to create directories and sub-directories that are based on the current date.

PHP: Create directory if it doesn’t exist.

This is a quick PHP tutorial on how to create a folder or directory if it doesn’t already exist.

PHP: Detect if request type is POST or GET.

In this guide, we will show you how to detect the HTTP request type using PHP. This is useful if you want to restrict URLs to POST, GET, etc.

PHP: PDO transaction example.

In this guide, we will show you how to use transactions with PHP’s PDO object.

Generating a 4-digit PIN code with PHP.

A tutorial on how to generate random PIN codes with PHP.

PHP: Login to website with cURL.

A tutorial on how to login to websites with cURL and PHP.

How to calculate VAT with PHP.

In this tutorial, we will show you how to calculate VAT with PHP. We will also show you how to get the VAT rate from a gross price.

Looping through dates in PHP.

A short guide to looping through dates in PHP.

PHP: Get query execution time.

Measure the execution time of an SQL query in PHP.

Secure passwords with PHP.

An up-to-date tutorial on how to properly deal with passwords in PHP.

PHP: Get the first Monday of a month (and more)

This is a small cheat sheet for PHP’s strtotime function, which can be used to convert textual sentences such as “next Friday” into UNIX timestamps.

PHP: Convert YYYY-MM-DD to DD-MM-YYYY

Convert a YYYY-MM-DD date into a DD-MM-YYYY date in PHP.

Get the last character in a PHP string.

A short guide on how to get the last character of a string in PHP.

PHP FizzBuzz solution

In this guide, we show you how to write a simple PHP solution for the FizzBuzz game.

How to get the structure of a MySQL table in PHP.

This tutorial will show you how to get the structure of a MySQL table using PHP’s PDO object.

PHP CSRF Protection.

In this PHP tutorial, we are going to show you how to prevent Cross-site Request Forgery (CSRF) attacks.

PHP: Haversine Formula function.

A PHP function that implements the Haversine Formula.

PHP: Scalar type hints.

An introduction to scalar type hints in PHP 7.

Expiring MySQL rows the easy way!

An alternative solution to expiring MySQL rows and records.

Measuring the execution time of a PHP script

In this tutorial, we will show you how to measure the execution time of a PHP script using the microtime function.

Generating a random token in PHP.

A short guide on how to generate a secure and random token with PHP.

PHP: Get the first character in a string.

Get the first character in a string with PHP.

PHP: Get the last element in an associative array.

How to get the last element or key in an associative array.

PHP: Calculate the percentage of a number.

A small guide on how to calculate the percentage of a number in PHP.

PHP: Calculating a person’s age from their date of birth.

Calculate a person’s age using PHP.

Ajax form submission with PHP.

A tutorial on how to create an Ajax form that submits data to a PHP script.

PHP: Increase / decrease number by a given percent.

A small tutorial on how to increase or decrease a number by a given percentage in PHP.

PHP: Calculate the percent difference between two numbers.

A quick guide on how to calculate the percentage difference between two numbers in PHP.

Cannot modify header information – headers already sent.

PHP’s “Cannot modify header information” error will appear if you output data before you modify the headers.

Google Maps API – Location Picker Example

A simple tutorial on how to create a “Location Picker” with the Google Maps API.

Connecting to multiple databases with PDO.

This is a short tutorial on how to connect to multiple MySQL databases in the same script using the PDO object.

PHP User Registration & Login Form – PDO.

An introductory tutorial to building user login & registration forms with PHP’s PDO object.

Code

PHP: Create directory based on current date.

PHP: Create directory if it doesn’t exist.

PHP: Detect if request type is POST or GET.

PHP: PDO transaction example.

Generating a 4-digit PIN code with PHP.

PHP: Login to website with cURL.

How to calculate VAT with PHP.

Looping through dates in PHP.

PHP: Get query execution time.

Secure passwords with PHP.

PHP: Get the first Monday of a month (and more)

PHP: Convert YYYY-MM-DD to DD-MM-YYYY

Get the last character in a PHP string.

PHP FizzBuzz solution

How to get the structure of a MySQL table in PHP.

PHP CSRF Protection.

PHP: Haversine Formula function.

PHP: Scalar type hints.

Expiring MySQL rows the easy way!

Measuring the execution time of a PHP script

Generating a random token in PHP.

PHP: Get the first character in a string.

PHP: Get the last element in an associative array.

PHP: Calculate the percentage of a number.

PHP: Calculating a person’s age from their date of birth.

Ajax form submission with PHP.

PHP: Increase / decrease number by a given percent.

PHP: Calculate the percent difference between two numbers.

Cannot modify header information – headers already sent.

Google Maps API – Location Picker Example

Connecting to multiple databases with PDO.

PHP User Registration & Login Form – PDO.

Generating random names with PHP.

How to use checkboxes with PHP

Generate a random RGB or Hex color using PHP.