Indexed Arrays

PHP indexed array is an array that is represented by an index number by default. All elements of an array are represented by an index number which starts from 0.

PHP indexed array can store numbers, strings or any object. PHP indexed array is also known as a numeric array.

Definition

There are two method to define indexed array:

First Method :

$colors = array("Red", "Blue", "Yellow");

Second Method :

$colors[0]="Red";  
$colors[1]="Blue";  
$colors[2]="Yellow"; 

 
PHP Indexed Array Example

File Name: first_array.php

<?php  
$colors=array("Red","Blue","Yellow");  
echo "Color Name : $colors[0], $colors[1] and $colors[2]";  
?>  

Output: Color Name : Red Blue and Yellow

File Name : second_array.php
 

<?php  
$colors[0]="Red";  
$colors[1]="Blue";  
$colors[2]="Yellow"; 
echo "Color Name : $colors[0], $colors[1] and $colors[2]";  
?>  

Output: Color Name : Red Blue and Yellow

Traversing PHP Indexed Array

We can easily traverse array in PHP using foreach loop. Let's see a simple example to traverse all the elements of PHP array.

File Name : third_array.php
 

<?php  
$colors = array("Red", "Blue", "Yellow");
foreach( $colors as $color )  
{  
  echo "Color is: $color <br />";  
}  
?>  

Output:

Color is: Red
Color is: Blue
Color  is: Yellow

Count Length of PHP Indexed Array

PHP provides count() function which returns length of an array.

<?php  
$colors=array("Red","Blue","Yellow");  
echo count($colors);  
?>  

Output: 3

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