How Can I Implode an Array with Commas and \'and\' Before the Last Item?

Imploding an Array with Commas, Adding "and" Before the Final Item

Imploding an array into a string can be straightforward, but adding an "and" before the last item requires a bit more finesse. Consider an array of beverages:

[
    "coke",
    "sprite",
    "fanta"
]

Imploding this array with a comma returns:

coke, sprite, fanta

However, we want to modify it to:

coke, sprite and fanta

Here's how you can achieve this using a combination of array slicing, merging, filtering, and joining:

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

This method efficiently handles arrays of all sizes, including cases with zero, one, or two elements, without the need for additional conditional statements. The versatility of this approach allows it to be collapsed into a single line:

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

This long-line solution ensures proper handling of all scenarios, from empty arrays to large lists of items.

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