This highly interactive course introduces you to fundamental programming concepts in PHP, one of the most popular languages in the world. It begins with a simple Hello world program and proceeds on to cover common concepts such as Conditional Statements, Loop Statements, and Logic in PHP. 

It then reflects upon the idea of Functions and Arrays, as well as the power they give to the programmer to write better code. 

Finally, it dives deeper in order to teach about advanced concepts such as Classes, Inheritance and Exception Handling in PHP. By the time you're done, you'll have a good grip on the basics of PHP, and will be ready to study advanced concepts.

Learn PHP from Scratch

## What are Infinite Loops 
One common programming mistake is to create an **infinite** loop. An **infinite** loop refers to a loop, which under certain valid (or at least plausible) input, will never **exit**.

>**Note:** Beginner programmers” should be careful to examine all the *possible* inputs into a *loop* to ensure that for each such set of inputs, there is an **exit** condition that will eventually be reached. 

*Compilers*, *debuggers*, and other *programming tools* can only help the programmer so far in detecting **infinite** loops. 

>**Note:** In the sufficiently general case, it is not possible to automatically detect an infinite loop. This is known as the **halting** problem. 

While the halting problem is not solvable in the fully general case, it is possible to determine whether a loop will **halt** for some *specific* cases.

### Example of Infinite loop

Down below is an example of an *infinite* loop.


# What are Infinite Loops 
One common programming mistake is to create an **infinite** loop. An **infinite** loop refers to a loop, which under certain valid (or at least plausible) input, will never **exit**.

>**Note:** Beginner programmers” should be careful to examine all the *possible* inputs into a *loop* to ensure that for each such set of inputs, there is an **exit** condition that will eventually be reached. 

*Compilers*, *debuggers*, and other *programming tools* can only help the programmer so far in detecting **infinite** loops. 

>**Note:** In the sufficiently general case, it is not possible to automatically detect an infinite loop. This is known as the **halting** problem. 

While the halting problem is not solvable in the fully general case, it is possible to determine whether a loop will **halt** for some *specific* cases.

## Example of Infinite loop

Down below is an example of an *infinite* loop.


This lesson explains how infinite loops might arise in a while loop using an example.

Getting Started

Variables

Operators

Conditional Statements

Loops

Functions

Strings

Arrays

PHP Assessment 1

Classes and Inheritance

Exception Handling

PHP Assessment 2

Infinite Loops

What are Infinite Loops #

Example of Infinite loop #