How to Join Array Elements with \', \' and \'and\' Before the Last Item?

Imploding an Array with ", " Including "and" Before the Last Item

In a programming scenario, you may encounter the need to create a string representation of an array, with a specified delimiter separating each element. However, you might also desire some specific formatting, such as adding "and" before the final item instead of a comma.

To achieve this, you can utilize a long-liner function that effectively handles arrays of varying lengths:

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

For those who prefer a more verbose approach:

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

This approach employs a combination of slicing, merging, filtering, and joining operations to ensure correct handling for all cases, including empty arrays, single-element arrays, and multi-element arrays. It also supports user-defined delimiters, providing flexibility in how the array elements are separated.

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