使用PHP和Mysql获取的表中特定行的值的突出显示或着色

I am a beginner to PHP. I am looking to highlight or color the values of first and last row in a table fetched using PHP and Mysql.

Below is the code.

 <?php
  $result_trend = mysql_query("select Week, New_Tickets, Closed_Tickets, 
  Backlogged, Resolution_Rate, Transactions from table");
  while($row = mysql_fetch_array($result_trend))
  {
  echo "<tr>";
  echo "<td>" . $row['Week'] . "</td>";
  echo "<td>" . $row['New_Tickets'] . "</td>";
  echo "<td>" . $row['Closed_Tickets'] . "</td>";
  echo "<td>" . $row['Backlogged'] . "</td>";
  echo "<td>" . $row['Resolution_Rate'] . "</td>";
  echo "<td>" . $row['Transactions'] . "</td>";
  }
  echo "</tr>";
  ?>

I am not really sure how to proceed further. Any suggestion is much appreciated. Thanks in advance.

You can simply obtain number of results and then count iterations. And if this is 1. row or last, add the style you need or css class that you'll style in your css file. Like this:

 <?php
  $result_trend = mysql_query("select Week, New_Tickets, Closed_Tickets, 
  Backlogged, Resolution_Rate, Transactions from table");
  $rows_count = mysql_num_rows($result_trend);
  $i = 0;
  while($row = mysql_fetch_array($result_trend))
  {
  $i++;
  $style = "";
  if($i == 1 || $i == $rows_count) {
  //  $style .= "bgcolor=\"#FF0000\""   //for inline style, bad practise
      $style .= "class=\"colorful\""
  }
  echo "<tr " . $style . ">";
  echo "<td>" . $row['Week'] . "</td>";
  echo "<td>" . $row['New_Tickets'] . "</td>";
  echo "<td>" . $row['Closed_Tickets'] . "</td>";
  echo "<td>" . $row['Backlogged'] . "</td>";
  echo "<td>" . $row['Resolution_Rate'] . "</td>";
  echo "<td>" . $row['Transactions'] . "</td>";
  }
  echo "</tr>";
  ?>

You can define a CSS style for the first and last rows as below:

.my-table tbody tr:first-child {
  background-color: yellow;
}

<table class="my-table">
  <thead>
    <tr>
      <td>Col 1</td>
      <td>Col 2</td>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>First</td>
      <td>Row</td>
    </tr>
    <tr>
      <td>Second</td>
      <td>row</td>
    </tr>
    <tr>
      <td>Third</td>
      <td>row</td>
    </tr>
  </tbody>
</table>

</div>