Link to sort table column in PHP MYSQL -

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<?php $con = mysql_connect ("localhost", "user", "pass")    or die ('error: ' . mysql_error()); mysql_select_db ("members");  if(isset($_get['orderby'])){  $order = $_get['orderby'];  $result = "select * persons order ".mysql_real_escape_string($order)." desc";  } else{ $result = mysql_query("select * persons"); }  $num_rows = mysql_num_rows($result); $row_counter = 0;   echo "<table width=600 border=0 cellspacing=0>\n"; echo "<tr>\n       <th>&nbsp;</th>\n       <th>first name</th>\n       <th>last name</th>\n       <th>email address</th>\n       <th>city</th>\n       <th>state</th>\n       <th><a href='index.php?orderby=submitdate'>date</a></th>\n       </tr>";  while($row = mysql_fetch_array($result)){   if($row_counter % 2){     $row_color="bgcolor='#ffffff'";   }   else{     $row_color="bgcolor='#f3f6f8'";   }   echo "<tr ".$row_color.">";   echo "<td class='id'>" . $row['id'] . "</td>\n";   echo "<td>" . $row['firstname'] . "</td>\n";   echo "<td>" . $row['lastname'] . "</td>\n";   echo "<td>" . $row['email'] . "</td>\n";   echo "<td>" . $row['city'] . "</td>\n";   echo "<td>" . $row['state'] . "</td>\n";   echo "<td>" . $row['submitdate'] . "</td>\n";   echo "</tr>";   $row_counter++;   } echo "</table>";  mysql_close($con); ?

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i cannot figure out why link sort query not working. ideas? pre-thanks!

your if else block wrong. in 1 case $result query in result-set. check code below.. fixed.

<?php $con = mysql_connect ("localhost", "user", "pass")    or die ('error: ' . mysql_error()); mysql_select_db ("members");  if(isset($_get['orderby'])){  $order = $_get['orderby'];  $sql = "select * persons order ".mysql_real_escape_string($order)." desc";  } else{ $sql = "select * persons"; } $result = mysql_query($sql); $num_rows = mysql_num_rows($result); $row_counter = 0;   echo "<table width=600 border=0 cellspacing=0>\n"; echo "<tr>\n       <th>&nbsp;</th>\n       <th>first name</th>\n       <th>last name</th>\n       <th>email address</th>\n       <th>city</th>\n       <th>state</th>\n       <th><a href='index.php?orderby=submitdate'>date</a></th>\n       </tr>";  while($row = mysql_fetch_array($result)){   if($row_counter % 2){     $row_color="bgcolor='#ffffff'";   }   else{     $row_color="bgcolor='#f3f6f8'";   }   echo "<tr ".$row_color.">";   echo "<td class='id'>" . $row['id'] . "</td>\n";   echo "<td>" . $row['firstname'] . "</td>\n";   echo "<td>" . $row['lastname'] . "</td>\n";   echo "<td>" . $row['email'] . "</td>\n";   echo "<td>" . $row['city'] . "</td>\n";   echo "<td>" . $row['state'] . "</td>\n";   echo "<td>" . $row['submitdate'] . "</td>\n";   echo "</tr>";   $row_counter++;   } echo "</table>";  mysql_close($con); ?>

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