here is my simple code to random numbers from 0 - 5:

PHP Code:

for( $i = 0; $i <= 5; $i++) {
     echo mt_rand(0, 5). ", ";
} 


after running it many times, i got brief result as follows:
1, 4, 4, 5, 0
4, 0, 1, 5, 0
3, 2, 1, 1, 3
..
& so on..

my question is, what is the script in order the result doesn't contain DUPLICATE numbers like above.

I like the result something like this:
1, 5, 0, 3, 2
4, 1, 2, 3, 0

...

PHP Code:

while (count($array) < 5) {
   $ret = mt_rand(0, 5);
   if (!in_array($ret, $array))
      $array[] = $ret;
}

print_r($array); 


Indeed. All you have to do if you want unique values is to check every generated value with previews ones saved already in an array. If the value already exists then try it again.

@johnny.dacu:
yeah, u're right

@mtishetsky :
i've modified a bit of your script and it works.

PHP Code:

$i = 0;
$arrVar = array();
while( $i <= 5 ) {
      $rand_value = mt_rand(0, 5);
      if( !in_array($rand_value, $arrVar) ) {
          echo $rand_value;
      } else {
          continue;
      }
      $arrVar[$i] = $rand_value;
      $i++;
}

Thank You!