What to make checkbox for each row

In our website, we have textbox to ask input values from user. If user input the data Q54497899, rest of the results must be shown from database. Rightnow, I want to add checkbox on each result. I tried to add with foreach but it still doesn't work for me. I will provide codes below which were written in the correlationwafer_result.php. Want to add checkbox beside each Q54497899

    <?php  
// ini_set("memory_limit","512M");
include("_dbconn.php");
include("//sgewsnant21.amk.st.com/ewsweb/wwwroot/library/common7/db_config.inc");
include("//sgewsnant21.amk.st.com/ewsweb/wwwroot/library/common7/standard_defines.inc");
session_start();

$productlotid = isset ($_GET['productlotid'])? $_GET['productlotid']:'';

$sql = "SELECT * FROM productdb.tbl_correlationwafer WHERE `lotid` = '$productlotid'";
    $result1 = mysqli_query($conn,$sql);
$cnt = 0;   
echo "<table id='corwafer'>";


    while ($row = mysqli_fetch_assoc($result1)) {
        echo "<tr>";
        echo "<th colspan='2'>Lot ID:</th>";
        echo "<th colspan='2'>Product:</th>";
        echo "<th colspan='4'>EWSFLOW </th>";
        echo "<th>Zone</th>";
        echo "</tr>";
        
        $field1name = $row["lotid"];
        $field2name = $row["product"];
        $field3name = $row["ewsflow"];
        $field4name = $row["zone"];

        echo '<tr> 
                  <td colspan="2">'.$field1name.'</td> 
                  <td colspan="2">'.$field2name.'</td> 
                  <td colspan="4">'.$field3name.'</td> 
                  <td >'.$field4name.'</td> 
                   
              </tr>';
              
        foreach($productlotid as $k => $v){

            if($k == $row["lotid"]){
                echo "<input type=\"checkbox\" id=\"chkproductlotid" . $cnt . "\" name=\"chkproductlotid\" value=\"$v\"><font face=\"arial\" size=\"2\" color=\"#3C5F84\">". $k . "</font>";
            }
        }
        $cnt++;   
    }

echo "</table>";


flush();
mysqli_close($conn);
?>