PHP Tutorials

Tutorials, code snippets and articles relating to 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.

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.

Generating random names with PHP.

A short tutorial on how to generate random names with PHP.

How to use checkboxes with PHP

A tutorial on how to process HTML checkboxes with PHP.

Generate a random RGB or Hex color using PHP.

A simple tutorial on how to generate random RGB and Hex colors with PHP.

How to make a countdown using PHP

This tutorial will show you how to implement a server-side countdown using PHP and sessions.

PHP: Get the first element of an associative array.

A small tutorial on how to get the first element of an associative array in PHP.

Get an average number with PHP.

In this example, we are going to show you how to calculate an “average number” using PHP.

Generate a random date with PHP.

Generating a random date / timestamp with PHP.

PHP: Custom exception handling.

A simple tutorial on custom exception handling with PHP.

How to delete rows with the PDO object

This PHP tutorial will show you how to delete database rows using the PDO object and prepared statements.

PDO: Updating MySQL using prepared statements.

A beginners tutorial on updating MySQL rows with the PDO object.

PDO: Selecting rows from MySQL.

A beginners tutorial on how to select rows from MySQL using the PDO object.

PDO: Insert example.

A simple tutorial on how to insert rows into MySQL with the PDO object.

PHP: Insert multiple rows with PDO.

This PHP tutorial will show you how to insert multiple rows from a PHP array using the PDO object.

How to delete an element from an array in PHP

This is a short guide on how to remove an element from a PHP array.

PHP: Connecting to a MySQL database.

A simple tutorial on how to connect to a MySQL database with PHP.

Creating a CSV file with PHP.

This a short tutorial on how to create a CSV file with PHP.

How to print an array in PHP

This tutorial will show you how to print out the contents of a PHP array using the print_r or var_dump functions.

PHP: Get the distance between two locations.

A tutorial on how to get the driving distance between two locations in PHP.

PHP objects and classes for beginners

This is a beginner tutorial on PHP objects and classes.

Saving a PHP array to a database.

A short tutorial on how to save a PHP array to a database.

Reading a CSV file with PHP.

A tutorial on how to read CSV files with PHP.

How to fix slow PHP Scripts.

In this article, we will discuss the most common causes of slow PHP scripts.

PHP: Find the index key of a foreach loop.

In this PHP tutorial, we show you how to find the index of the current element in a foreach loop.

Saving a PHP array to a text file.

A simple tutorial on how to save a PHP array to a text file. This tutorial also shows you how to load the array in question.

Error Handling: Throwing PHP exceptions with the mysql_* extension.

A guide on error handling with PHP’s outdated mysql_* extension.

PHP recursion example.

In this article, we are going to show you how to create a recursive function in PHP.

Simple Ajax request example with JQuery and PHP.

Simple examples on how to carry out an Ajax request with JQuery and PHP.

Whitespace and PHP’s empty function.

Dealing with whitespace characters and PHP’s empty function.

Automatic Footer Copyright Year with PHP.

In this PHP tutorial, we will show you how to automatically add a copyright year to the footer of your website.

PHP: Verifying a user via email.

How to verify a user’s email address with PHP.

PHP: Email regex.

You should not be validating emails using regular expressions. Instead, you should use PHP’s filter_var function.

PHP: json_encode / json_decode error handling.

An article on how to do error handling with json_encode and json_decode.