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147.69 ms | 1403 KiB | 7 Q<?php
$data = ['First', 'Second', 'Third', 'Fourth', 'Fifth', 'Sixth'];
$chose = [];
$result = [];
$keys = [];
foreach($data as $i=>$item)
{
echo("Diff: \n");
var_dump($keys);
$keys = array_diff(array_keys($data), $chose, [$i]);
$pair = $keys[array_rand($keys)];
$chose[] = $pair;
$result[]= [$item, $data[$pair]];
echo("Chosen: \n");
var_dump($chose);
}
var_dump($result);