PHP7 Array Iteration

php7-array-iteration.php

<?php
function loopThroughArrayErrors($array)
{
    foreach($array['values'] as $key => $value)
    {
        echo $value; 
    }
}

function loopThroughArray($array)
{
    foreach($array['values'] ?? [] as $key => $value)
    {
        echo $value; 
    }
}

/**
 * This will error because the values index is undefined
 */
$array = ['stuff'];
loopThroughArrayErrors( $array );

/**
 * This will no error as an empty array will be used in the foreach
 */
$array = ['stuff'];
loopThroughArray( $array );