Array

The general syntax of assigning values to a array() is:

$clients[0] = 'Mike';
$clients[1] = 'David';
$clients[3] = 'John'; 

If you assign something to an array but leave the index blank, PHP assigns the object onto the end of the array. The statements below is the same as the above::

$clients[] = 'Mike';
$clients[] = 'David';
$clients[] = 'John';   

You also can use the below syntax to create an array:

ArrayName array(
                [index1]=>[value],
                [index2]=>[value],
                ...
               );

For example:

<?php
 $userName = "John";

 $clients = array(
                  0=>"Mike",
                  1=>"David",
                  2=>$userName
                 );
?>

To retrieve data from the array, we can:

<?php
 echo "The client is $clients[1]"; 
?>

The output will be:

The client is David

To print all elements in the array, we can use the For loop:

<?php 
for($i = 0; $i < count($clients); $i++) { 
echo $clients[$i];    
} 
?>