Question

I want to sort the data from a mysql database when clinking in the header of a html table. I wrote this code:

$username = $_SESSION['username']; // gets the username

echo "<table class='normal_table'>";

$new_word = mysql_query("SELECT * FROM new_word WHERE username='$username'");
$new_word2 = mysql_query($new_word);

echo " 

<tr>
<th><a href='test.php?sort=cz'>Czech:</a></th>
<th><a href='test.php?sort=en'>English:</a></th>
<tr>";

if ($_GET['sort'] == 'cz')
{
 $new_word .= " ORDER BY cz";
}
elseif ($_GET['sort'] == 'en')
{
 $new_word .= " ORDER BY en";
}

while($new_word2 = mysql_fetch_array($new_word)){

echo "
<tr>
<td> ".$new_word2['cz']."</td>
<td>".$new_word2['en']."</td>
</tr>

"; }

echo "</table>";

But on the screen does not appear any data whatsoever 🙁 What I did wrong?

Answer 1

You’re executing your query at

$new_word = mysql_query("SELECT * FROM new_word WHERE username='$username'");

then attempting to appen to that query object at

$new_word .= " ORDER BY en";

You need to build the query string first

so

$sql =  "SELECT * FROM new_word WHERE username='$username'"

append your ORDER BY

$sql .= " ORDER BY en";

then execute

$new_word = mysql_query($sql);

EDIT: Also remove $new_word2 = mysql_query($new_word); and change your while to use $new_world as Uttam Kadam says in their answer