<?php
function rowFromVar($varname) {
    $result  = "<tr>";
    $result .= "<td>\$$varname</td>";
    $result .= "<td>" . $$varname . "</td>";
    $result .= "</tr>";
    return $result;
}

print rowFromVar("sarfraz");
?>

<tr><td>$sarfraz</td><td></td></tr>