我可以将一个字段的查询结果存储到不同的变量中吗？ 如果没有那么我该怎么做？

This code shows the output as subject1 subject2 subject3 subject4 but I want to store that values in different variables (like $s1=[1],$s2[2],$s3[3],$s4[4]) so I and use them in different functions what should I do? can any one help please...

$query = mysql_query("select `subject` from `markssub1` where `sname`='$user' AND `sid`='$id'");

$subjects = [];

while($row = mysql_fetch_array($query))
{
    $subjects[] = $row['subject'];  
}

foreach($subjects as $subject){
    echo $subject . '
';
}