Implode an array with “, ” and add “and ” before the last item

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A long-liner that works with any number of items:

echo join(' and ', array_filter(array_merge(array(join(', ', array_slice($array, 0, -1))), array_slice($array, -1)), 'strlen'));

Or, if you really prefer the verboseness:

$last  = array_slice($array, -1);
$first = join(', ', array_slice($array, 0, -1));
$both  = array_filter(array_merge(array($first), $last), 'strlen');
echo join(' and ', $both);

The point is that this slicing, merging, filtering and joining handles all cases, including 0, 1 and 2 items, correctly without extra if..else statements. And it happens to be collapsible into a one-liner.

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