Creating alias out of given name

alias-list.php

<?php
$items = [
    'Aluminium Manufacturing',
    'Cement Manufacturing',
    'Chemicals',
    'Chemicals - Fertilizers',
    'Chemicals - Methanol',
    'Construction',
    'Contract Laboratory Services',
    'Education',
    'Electronics',
    'Energy',
    'Engineering',
    'Food & Beverage',
    'Gas Processing',
    'Gas Upstream',
    'Goverment',
    'Manufacturing',
    'Mining & Minerals',
    'Other',
    'Petrochemicals',
    'Petroleum - Terminals',
    'Petroleum - Lubricants',
    'Petroleum - Refining',
    'Pharma',
    'Sales Agent',
    'Steel Manufacturing',
    'Utilities',
    'Power Generation',
];

echo PHP_EOL;
foreach ($items as $i) {
    $alias = str_replace(' ', '_', $i);
    $alias = preg_replace('/[^A-Za-z0-9\_]/', '', $alias);
    $alias = str_replace('__', '_', $alias);
    $alias = strtolower($alias);
    $display = $i;
    echo "$alias, $display," . PHP_EOL;
}