Iterate over an array as a sliding window of element pairs.

EachCons.php

<?php
$a = array(1, 2, 3);
$pairs = array_map(null, $a, array_slice($a, 1));

/**
 * Prints:
 * (1,2)(2, 3)(3, )
 */
foreach ($pairs as list($x, $y)) {
    echo "({$x}, {$y})";
}

+1

thanks