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Asked: 2026-06-13T08:38:15+00:00

I have some code to produce a table from an SQL query. I would

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I have some code to produce a table from an SQL query. I would like the background color of the cell to represent the value of “rel.cat”, which can be an integer between 1-8.

<!DOCTYPE HTML>
<html>
<head>
</head>
<body>
<?php
// Connect to the database server
$dbcnx = mysql_connect("xxxxx",xxxxx,xxxxx);
if (!$dbcnx) {
  echo( "<P>Database Connection Failed</P>" );
  exit();
}
// Select the matrix databse database
  if ( !@mysql_select_db("sustaina_matrix") ) {
    echo( "<P>Not Connected to Matrix Database</P>" );
    exit();
  }
// Assign the query
$query = "SELECT rel.id, rel.cat colourcode FROM rel";
// Execute the query
$result = mysql_query($query);
if (!$result){
    die ("Could not query the database: <br />". mysql_error());
}
?>
<table>
    <tr>
        <th>Relationship ID</th>
        <th>Colour ID</th>
</tr>
<?php
// Change colours
function getcolour()
{
    if ($catc = "1")
        return '#000000';
    elseif($catc = "2")
        return '#C0C0C0';
    elseif($catc = "3")
        return '#00FF00';
    elseif($catc = "4")
        return '#0000FF';
    elseif($catc = "5")
        return '#FF99FF';
    elseif($catc = "6")
        return '#FF9900';
    elseif($catc = "7")
        return '#FF0000';
    else
        return '#FFFFFF';
}
// Fetch and display the results
while ($row = mysql_fetch_array($result, MYSQL_ASSOC)){
    $id = $row["id"];
    $catc = $row["colourcode"];
    echo "<tr>";
    echo "<td>$id</td>";
    echo "<td bgcolor='getcolour()'>$catc</td>";
    echo "</tr>";
}
?>
</table>
</body>
</html>

Currently all the cells are red, and I don’t know why.

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1 Answer

  1. Editorial Team

    You have several problems.

    • Pass and accept $catc to the function getcolour().
    • Use logical operator (==) not assignment (=) in your conditions.
    • Properly output the function results.

    Code:

    function getcolour($catc) {
    // ... existing code
}

echo "<td bgcolor='" . getcolour($catc) . "'>$catc</td>";
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