php - 如何在循环中排除一行代码

Question

I have a code in HTML in a table. And I want the loop to just ignore them

<?php
$sel_admin = "query  ";
$rs_admin = mysql_query($sel_admin);
while($row = mysql_fetch_array($rs_admin))
{      
    echo "<th>". $row['a'].  "</th>";


    </thead> // This two line of code
    <tbody>  // is the one I want to exclude in the while loop


    $sel_admin2 = "query2  ";
    $rs_admin2 = mysql_query($sel_admin2);
    while($row2 = mysql_fetch_array($rs_admin2))
    {
        echo" <tr class='gradeX'> ";
        echo "<td>" . $row2['sched3_time'].  "</td>";
        echo"</tr>";
    }
}
?>

Is this even possible?

Answer 1

I'm guessing you want those lines printed once, not to be outside the loop, per se. You could use a variable to track it:

$linesNeeded = true;
while (...) {
  ...
  if ($linesNeeded) {
    echo $line1;
    echo $line2;
    $linesNeeded = false;
  }
  ...
}