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<?php

    namespace Sausages;

    echo "PHP version: " . PHP_VERSION . PHP_EOL;

    $arr = array(
        'a' => array(
            'apples'   => 'green',
            'sausages' => 'brown',
        ),
        'b' => 'bananas',
    );

    try {
//           if(is_array($arr['a']))
             if(is_array($arr['b']))
                echo $arr['a']['sausages'];
             else
                throw new \Exception('No Sausages');
    } catch(\Exception $e) {
            echo "Error: " . $e->getMessage() . PHP_EOL;
    }