How to print the entire array in PHP

If we really want to print an array as it is, we will use the print_r() function. This shows us all the keys and their values of the directory we’re writing:

<?php
$colors = ['blue', 'orange', 'green'];
print_r($colors);
?>

An output appears on the screen:

Array
(
    [0] => blue
    [1] => orange
    [2] => green
)