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Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
<?php
$a = [1,2,3,4];
$limit = 5;
$limit = min($limit, count($a));
foreach ($a as $position => $value) {
echo $value,"\n";
$beginning = 0;
for($i = 1; $i < $limit; $i++) {
$ahead = $a[$position + $i] ?? $a[$beginning++] ?? null;
if ($ahead) {
echo " ", $ahead,"\n";
}
}
}