Description:
------------
http://localhost:8080/arrayAleatorio.php?juego=8

<?php
// 2 primeros numeros = nº juegos; 
$a = array(9, 26, 31, 42, 4, 2, 11, 13, 19, 20, 23, 24, 28, 30, 39, 39, 1, 5, 
14, 18, 36, 49, 15, 16, 25, 27, 33, 34, 38, 43, 48, 7, 10, 22, 32, 3, 6, 35, 44, 
47, 8, 12, 17, 29, 37, 45, 21, 46, 40, 41);

for ($j = 1; $j < $_GET["juego"]+1; $j++) {
	echo "<p style='font-family: Arial; font-size: 2em; text-align: center; 
color: blue'>";
	$rand_keys = array_rand($a, 6);
	asort($rand_keys);
	
	print_r($rand_keys);
	
	//$i = 0;
	for ($i = 0; $i < 6; $i++) {
	//foreach ($rand_keys as $val) {
		//$i++;
		if ($i < 5)
			echo $rand_keys[$i]." - "; //echo $val." - ";
		else
			echo $rand_keys[$i]; //echo $val;
	}
	echo "</p>";
	if (($j%2) == 0) 
		echo "<br/>";
	
}

Test script:
---------------
Array ( [0] => 4 [1] => 8 [2] => 13 [3] => 16 [4] => 17 [5] => 46 ) 4 - 8 - 13 - 16 - 17 - 46

Array ( [0] => 7 [1] => 9 [2] => 11 [3] => 16 [4] => 28 [5] => 32 ) 7 - 9 - 11 - 16 - 28 - 32


Array ( [0] => 18 [1] => 23 [2] => 29 [3] => 34 [4] => 35 [5] => 43 ) 18 - 23 - 29 - 34 - 35 - 43

Array ( [0] => 1 [1] => 6 [2] => 7 [3] => 13 [4] => 27 [5] => 44 ) 1 - 6 - 7 - 13 - 27 - 44


Array ( [0] => 7 [1] => 14 [2] => 32 [3] => 41 [4] => 42 [5] => 48 ) 7 - 14 - 32 - 41 - 42 - 48

Array ( [0] => 7 [1] => 13 [2] => 15 [3] => 22 [4] => 27 [5] => 38 ) 7 - 13 - 15 - 22 - 27 - 38


Array ( [0] => 0 [1] => 2 [2] => 3 [3] => 29 [4] => 43 [5] => 49 ) 0 - 2 - 3 - 29 - 43 - 49

Array ( [0] => 18 [1] => 23 [2] => 33 [3] => 34 [4] => 36 [5] => 39 ) 18 - 23 - 33 - 34 - 36 - 39

Expected result:
----------------
0 not exist in array

Actual result:
--------------
Array ( [0] => 4 [1] => 8 [2] => 13 [3] => 16 [4] => 17 [5] => 46 ) 4 - 8 - 13 - 
16 - 17 - 46

Array ( [0] => 7 [1] => 9 [2] => 11 [3] => 16 [4] => 28 [5] => 32 ) 7 - 9 - 11 - 
16 - 28 - 32


Array ( [0] => 18 [1] => 23 [2] => 29 [3] => 34 [4] => 35 [5] => 43 ) 18 - 23 - 
29 - 34 - 35 - 43

Array ( [0] => 1 [1] => 6 [2] => 7 [3] => 13 [4] => 27 [5] => 44 ) 1 - 6 - 7 - 
13 - 27 - 44


Array ( [0] => 7 [1] => 14 [2] => 32 [3] => 41 [4] => 42 [5] => 48 ) 7 - 14 - 32 
- 41 - 42 - 48

Array ( [0] => 7 [1] => 13 [2] => 15 [3] => 22 [4] => 27 [5] => 38 ) 7 - 13 - 15 
- 22 - 27 - 38


Array ( [0] => 40 [1] => 2 [2] => 3 [3] => 29 [4] => 43 [5] => 49 ) 40 - 2 - 3 - 
29 - 43 - 49

Array ( [0] => 18 [1] => 23 [2] => 33 [3] => 34 [4] => 36 [5] => 39 ) 18 - 23 - 
33 - 34 - 36 - 39