Cómo ver una imagen dentro del borde y cerrarla haciendo clic fuera del borde

Tengo este guión de un amigo que falleció.

Muestra las imágenes ordenadas por hora y fecha. Funciona bien haciendo clic en el pulgar, pero quiero ver la imagen dentro de los bordes y cerrarla haciendo clic fuera de los bordes.

Lo que he probado:

.column {
  float: left;
  padding: 3px;
}
.row {
  display: flex;
}
/* Clear floats after image containers */
.row::after {
  content: "";
  clear: both;
  display: table;
}

echo '';
echo '';
echo '';
echo '';
echo '<title>Last received images from the Me';
echo '';
echo '';
echo '';
echo '';
echo '<p align="center"><font size="6"> Received images from the Meteor m-2      ';
echo ' </font></p>';
echo '<p align="center"><font size="6"> This week      ';
echo ' </font></p>';

echo '<p align="center"><font size="2">(click on a image to view in real size)</font></p>';

echo '';

echo '';
echo '';
echo '';
echo '';
echo '';
?>

 $file, "large_name" => $large_filename,"realdate_created" => $realdate
                                    , "weekday_number" => $weekday_number, "weekday" => $weekday 
                                    , "file_date" => $filedate, "realdate_created" => $realdate, "realdate_unix" => $realdate_unix);
                
                $counter++;
            }
        }
    }
    closedir($handle);
    
    $columns = array_column($fileNames, 'realdate_unix');
    array_multisort($columns, SORT_DESC, $fileNames);

    $loop_counter = 0;
    $weekday_number_loop = 99;

    foreach ($fileNames as &$value) {
        if($fileNames[$loop_counter]['weekday_number'] <> $weekday_number_loop){
            $weekday_number_loop = $fileNames[$loop_counter]['weekday_number'];
            echo "<div class="row">";
            echo "<div class="column">";
            echo $fileNames[$loop_counter]['weekday']." ".$fileNames[$loop_counter]['file_date'];
            echo "</div>";            
        
        
        }

        echo "<div class="column">";
        echo "<a href="".$large_image_dir.$fileNames[$loop_counter][" target="_blank">";
        echo "";
        echo "</a>";
        echo "</div>";          
        
        $loop_counter++;   

        if(count($fileNames)-1 >= $loop_counter){
            if($fileNames[$loop_counter]['weekday_number'] <> $weekday_number_loop){
                echo "</div>";
            }
        }
    }
    echo "";
 
}else {
    echo "<p>There is an directory read issue , no received images yet </p>";
}
?>