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

prepends passed value at the front of an array

prepends passed key at the front of an array

<code>array_unshift()</code> function

pushes passed value at the end of an array

Array
(
    [0] => 15
    [1] => 14
    [2] => 2
    [3] => 4
    [4] => 5
    [5] => 9
)

Array
(
    [0] => 14
    [1] => 15
    [2] => 2
    [3] => 4
    [4] => 5
    [5] => 9
)

Array
(
    [0] => 2
    [1] => 4
    [2] => 5
    [3] => 9
    [4] => 14
    [5] => 15
)

What will be the output of the following code:
```php
<?php
$arr = array(2,4,5,9);
array_unshift($arr, 14, 15);
print_r($arr);
?>

```

What will be the output of the following code:
<pre><code class="language-php">&lt;?php
$arr = array(2,4,5,9);
array_unshift($arr, 14, 15);
print_r($arr);
?&gt;

</code></pre>

Array
(
    [0] => 2
    [1] => 4
    [2] => 5
    [3] => 9
    [4] => 15
    [5] => 14
)

What will be the output of the following code:
```php
<?php
$arr = array(2,4,5,9);
array_push($arr, 14, 15);
print_r($arr);
?>

```

What will be the output of the following code:
<pre><code class="language-php">&lt;?php
$arr = array(2,4,5,9);
array_push($arr, 14, 15);
print_r($arr);
?&gt;

</code></pre>

Array
(
    [0] => 1
    [1] => 3
    [2] => 5
    [4] => 9
    [5] => 11
)

Array
(
    [0] => 1
    [2] => 5
    [3] => 7
    [4] => 9
    [5] => 11
)

Array
(
    [3] => 7
    [4] => 9
    [5] => 11
)

What will be the output of the following code:
```php
<?php
$arr=array(1,3,5,7,9,11);
unset($arr[3]);
print_r($arr);
?>
```

What will be the output of the following code:
<pre><code class="language-php">&lt;?php
$arr=array(1,3,5,7,9,11);
unset($arr[3]);
print_r($arr);
?&gt;
</code></pre>

Array
(
    [0] => 20
    [1] => 4
    [2] => 1
    [3] => 0
    [4] => -22
    [5] => -44
)

Array
(
    [0] => -44
    [1] => -22
    [2] => 0
    [3] => 1
    [4] => 4
    [5] => 20
)

Array
(
    [0] => -22
    [1] => 4
    [2] => 1
    [3] => 20
    [4] => 0
    [5] => -44
)

Array
(
    [5] => -44
    [4] => 0
    [3] => 20
    [2] => 1
    [1] => 4
    [0] => -22
)

What will be output of the following code:
```php
<?php
$numbers = array(-22, 4, 1, 20, 0, -44);
sort($numbers);
print_r($numbers);
?>
```

What will be output of the following code:
<pre><code class="language-php">&lt;?php
$numbers = array(-22, 4, 1, 20, 0, -44);
sort($numbers);
print_r($numbers);
?&gt;
</code></pre>

What will be the output of the following code:
```php
<?php
$numbers = array(-22, 4, 1, 20, 0,-44);
ksort($numbers);
print_r($numbers);
?>
```

What will be the output of the following code:
<pre><code class="language-php">&lt;?php
$numbers = array(-22, 4, 1, 20, 0,-44);
ksort($numbers);
print_r($numbers);
?&gt;
</code></pre>

Solve this quiz to practice your concepts of arrays.

Getting Started

Variables

Operators

Conditional Statements

Loops

Functions

Strings

Arrays

PHP Assessment 1

Classes and Inheritance

Exception Handling

PHP Assessment 2

Quiz 2