Array at PHP part 1

Array is a collection of some of the data stored in a variable.  Each data in array has a index as a
identifier. Array can accommodate more than one value. Each member of array is referred to as elements.
For example we want to save brand name of  motorcycle into the variable $brand_motor. There are 4 brand name they are Honda, Yamaha, Suzuki and Kawasaki. Let's see illustration of variable $brand_motor  below.

Every value in elemets variable $brand_motor above can be accessed or called use index. There are 2 kinds of index, in the use of PHP they are:

1. Index Numeric=  use a number to mark an array element.

2. Index Associative= give a name to mark an array element.

Array Initialization

1. Index Numeric

Initialization array with index numeric can be done with way below.

         $brand_motor= array ( "Honda", "Yamaha", "Suzuki", "Kawasaki" );

or

         $brand_motor [ ]= "Honda" ;
         $brand_motor [ ]= "Yamaha" ;
         $brand_motor [ ]= "Suzuki" ;
         $brand_motor [ ]= "Kawasaki" ;

Above is automatic way because index is defined automatically by program. Below is a manual way because we defined index manually. Let's see...

         $brand_motor [0]= "Honda" ; 
         $brand_motor [1]= "Yamaha" ;
         $brand_motor [2]= "Suzuki" ;
         $brand_motor [3]= "Kawasaki" ;

Below is illustration of variable $brand_motor.

In PHP to display all the elements and values ​​from an array, we use print_r(). Let's see example below.

Click show to see and copy this code

<?php $brand_motor [0]= "Honda" ; $brand_motor [1]= "Yamaha" ; $brand_motor [2]= "Suzuki" ; $brand_motor [3]= "Kawasaki" ; echo"<pre>"; print_r($brand_motor); echo"</pre>"; ?>

Below is output.

2. Index Associative

Initialization array with index associative can be done with way below.

             $brand_motor= array ( "motor_1"=>"Honda",
                                               "motor_2"=> "Yamaha",
                                               "motor_3"=>"Suzuki",
                                               "motor_4"=>"Kawasaki" );

or

             $brand_motor ['motor_1']= "Honda" ;
             $brand_motor ['motor_2']= "Yamaha" ;
             $brand_motor ['motor_3']= "Suzuki" ;
             $brand_motor ['motor_4']= "Kawasaki" ;

Below is illustration of variable $brand_motor above. 

Let's see example below.

Click show to see and copy this code

<?php $brand_motor ['motor_1']= "Honda" ; $brand_motor ['motor_2']= "Yamaha" ; $brand_motor ['motor_3']= "Suzuki" ; $brand_motor ['motor_4']= "Kawasaki" ; echo "<pre>"; print_r($brand_motor); echo "</pre>"; ?>

Below is output.

Let's see reed more to Array at PHP part 2 here.