<?php
$winnersNumber = 17;
$totalParticipant = 197;
$i = 0;
$iteration = 0;

$winnersArray = array();
while (count($winnersArray) < $winnersNumber) {
    $r = mt_rand(1, $totalParticipant);
		$iteration++;
    if ( !in_array($r, $winnersArray) ) {
        $winnersArray[] = $r;
    }
}
echo "les gagnants : ". join($winnersArray, ', ')."\n";
echo "nombre d'item dans l'array final ".count($winnersArray)."\n";
echo ("nombre d'item dans l'array rendu unique: " .count(array_unique($winnersArray))."\n");
echo ("nombre d'iterations : ". $iteration."\n");