PHP Indexed Arrays

PHP Indexed Arrays are a fundamental data structure used to store and manage an ordered collection of elements. Each element is assigned a unique numeric index (starting from 0).

Example

Create and display an indexed array:

<!DOCTYPE html>
<html>
<body>
<pre>

<?php
$cars = array("Volvo", "BMW", "Toyota"); 
var_dump($cars);
?>

</pre>
</body>
</html>

Output

array(3) {
[0]=>
string(5) "Volvo"
[1]=>
string(3) "BMW"
[2]=>
string(6) "Toyota"
}

• Access Indexed Arrays

To access an array item you can refer to the index number.

An indexed array is a fundamental data structure in PHP that stores a collection of values using numerical indexes as keys.

The first element has an index of 0, the second has an index of 1, and .
These indexes are integers starting from 0.

Example

Display the first array item:

<!DOCTYPE html> <html> <body> <?php $cars = array("Volvo", "BMW", "Toyota"); echo $cars[0]; ?> </body> </html>

Output

Volvo

• Change Value

To change the value of an array item, use the index number:

Example

Change the value of the second item:

<!DOCTYPE html> <html> <body> <pre> <?php $cars = array("Volvo", "BMW", "Toyota"); $cars[1] = "Ford"; var_dump($cars); ?> </pre> </body> </html>

Output

array(3) {
[0]=>
string(5) "Volvo"
[1]=>
string(4) "Ford"
[2]=>
string(6) "Toyota"
}

• Loop Through an Indexed Array

To loop through and print all the values of an indexed array, you could use a foreach loop, like this:

Example

Display all array items:

<!DOCTYPE html> <html> <body> <?php $cars = array("Volvo", "BMW", "Toyota"); foreach ($cars as $x) { echo "$x
"; } ?> </body> </html>

Output

Volvo
BMW
Toyota