//place of member
$a=15;

//array created from db with users order by their placment
//multi array could be better, depend on your data
$position = array('sdsd','dgdfgd','dgdfgd','dgdfgd','dgdfgd',
                        'dgdfgd','dgdfgd','dgdfgd','dgdfgd',
                        'dgdfgd','dgdfgd','dgdfgd','dgdfgd',
                        'dgdfgd','dgdfgd','dgdfgd','dgdfgd',
                        'dgdfgd','dgdfgd','dgdfgd','dgdfgd',
                        'dgdfgd','dgdfgd','dgdfgd','dgdfgd',
                        'dgdfgd','dgdfgd','dgdfgd','dgdfgd',
                        'dgdfgd','dgdfgd','dgdfgd','dgdfgd',
                        'dgdfgd')
;

//using for loop to show details
for ($i=$a-7;$i<$a+8;$i++){
    if ($i == $a) {
        echo "<b>".$i."</b> ".$position[$i]."<br>\n";
    }
    else {
    echo $i." ".$position[$i]."<br>\n";
    }
}