考虑字段值的着色表行

Question

I'm working on a corporate website in which you retrieve (via a MySQL consult) some data that are formatted on a HTML table. The problem comes when trying to change the row color if a specific field value is one or another.

The (partial) code is:

    $RowCt = 0;
while($Row = mysql_fetch_assoc($Result))
{   
    $timezone = new DateTimeZone( "Europe/London" );
    $date = new DateTime();
    $date->setTimezone( $timezone );
    $ahora = $date->format( 'H:i' ); 

    if ($var == 1) {
        $rowcolor = "red";
    } else if ($var == 0) {
        $rowcolor = "yellow";
    } else {
        $rowcolor = "white";
    }

    //$Table.= "<tr style='background-color:#FFFFFF;'>";

    foreach($Row as $field => $value)
    {                   
        switch ($field) {
            default:
                $Table.= "<td style='font-size:14px; background-color:$rowcolor' align='center'>$value</td>"; 
                break;  
            case a:          
                if ($now > $value) {
                        $var == 0;
                    } else {    
                        // Do nothing
                    }
                $Table.= "<td style='font-size:14px; background-color:$rowcolor' align='center'>$value</td>"; 
                break;
            case b:
                if ($now > $value) {
                        $var == 1;
                    } else {    
                        // Do nothing
                    }
                $Table.= "<td style='font-size:14px; background-color:$rowcolor' align='center'>$value</td>"; 
                break;
            case c:
                switch ($value) {
                    case 1:
                        $Table.= "<td style='font-size:14px; background-color:$rowcolor' align='center'>a</td>";
                        break;
                    case 2:
                        $Table.= "<td style='font-size:14px; background-color:$rowcolor' align='center'>b</td>";
                        break;
                }
            case d:
                switch ($value) {
                    case 3:
                        $Table.= "<td style='font-size:14px; background-color:$rowcolor' align='center'>a</td>";
                        break;
                    case 4:
                        $Table.= "<td style='font-size:14px; background-color:$rowcolor' align='center'>b</td>";
                        break;
                    case 5:
                        $Table.= "<td style='font-size:14px; background-color:$rowcolor' align='center'>c</td>";
                        break;
                    case 6:
                        $Table.= "<td style='font-size:14px; background-color:$rowcolor' align='center'>d</td>";
                        break;
                }
            case e:
                switch ($value) {
                    case "E":
                        $Table.= "<td style='font-size:14px; background-color:$rowcolor' align='center'>a</td>";
                        break;
                    case "I":
                        $Table.= "<td style='font-size:14px; background-color:$rowcolor' align='center'>b</td>";
                        break;
                    case "F":
                        $Table.= "<td style='font-size:14px; background-color:$rowcolor' align='center'>c</td>";
                        break;
                }
        }
    }
$Table.= "</tr>";

The problem comes when trying to define a value inside of the switch statement, and then trying to make it be a condition so the entire row is colored (yellow if case 1 is selected and we aren't on time; red if case 2 is selected and we aren't on time).

Answer 1

Your code snippet doesnt really explain much, but from i can see, i would advise your switch differently. Your switch is building HTML output.

I would encourage using switch to rather set the style in a $style variable, also... strictly speaking it makes better logic to use case: first and then default: eg.

switch ($condition) {
  case 1 : $style = 'background:red;'; break;
  case 2 : $style = 'background:yellow;'; break;
  default : $style = 'background:white;';
}

now build your HTML eg.

foreach ($results as $row) echo '<tr><td style="'.$style.'">Cell data</td></tr>';

For multiple cases on switch:

switch ($condition) {
  case 0:
  case 1:
    // Do something
    break;
  case 2: /* Do something */ break;
  default: /* Do something */ break;
}

2 Tier switch:

switch ($condition_1) {
  case 0 :
    switch ($condition_2) {
      case 'A' :
      // do something
      break;
    }
  break;
}

Don't forget to BREAK in both levels