Web Development with PHP

This highly interactive module introduces us 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 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 into advanced concepts such as classes, inheritance, and exception handling in PHP. By the time we're done, we’ll have a good grip on the basics of PHP and will be ready to study advanced concepts.

Learn PHP from Scratch

A function needs function definition to perform a specific task.

A function needs function definition to perform a specific task.

A local variable declared in a function is usable outside that function.

A local variable declared in a function is usable outside that function.

What is the value displayed at the end of the following recursive function?
```
<?php 
function fun(int $n)
{
 if ($n == 4) return $n;
 else return 2*fun($n+1);
}
echo fun(2);

?> 
```

What is the value displayed at the end of the following recursive function?
<pre><code>&lt;?php 
function fun(int $n)
{
 if ($n == 4) return $n;
 else return 2*fun($n+1);
}
echo fun(2);

?&gt; 
</code></pre>

What will be displayed when the following PHP code is executed:
```
<?php
function myFunc($value)
{
 echo "its value is: $value";
}
echo "x is a variable, ";
myFunc(4);
?>

```

What will be displayed when the following PHP code is executed:
<pre><code>&lt;?php
function myFunc($value)
{
 echo &quot;its value is: $value&quot;;
}
echo &quot;x is a variable, &quot;;
myFunc(4);
?&gt;

</code></pre>

What is the correct way to create a function in PHP?



What is the correct way to create a function in PHP?

Solve a quick quiz to test your understanding of functions in PHP.

Getting Started

Variables

Operators

Conditional Statements

Loops

Functions

Strings

Arrays

PHP Assessment 1

Classes and Inheritance

Exception Handling

PHP Assessment 2

Conclusion

Quick Quiz on Functions