while (($i <= 8) || ($x <= 5)){
  $i++;
  $x++;
}

while (($i <= 5) || ($x <= 8))

while (($i <= 8) && ($x <= 5)){
  $i++;
  $x++;
}

while (($i <= 8) && ($x <= 5)){
}

while($x<5 && $y<8) {//Your code here}

while (($i <= 5) XOR ($x <= 8))