wing_zero Posted June 8, 2006 Share Posted June 8, 2006 okey, i wrote this guestbook script for an assignment, and i have this errorWarning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in W:\www\guestbook.php on line 41i can't find the error though :S, sorry new to php and mysql so any help would be great.here is my codethe href is on one line too, even though it looks like 2[code]<?php require($_SERVER["DOCUMENT_ROOT"]."/config/db_config.php"); $connection = @mysql_connect($db_host, $db_user, $db_password) or die("error in connection"); mysql_select_db($db_name, $connection); $name = $_POST["txt_name"]; $len = strlen($name); //Only write to database if there's a name if ($len > 0) { $email = $_POST["txt_email"]; $comment = $_POST["txt_comment"]; $date = time(); $query = "INSERT INTO guestbook (autoID, name, email, comment, date_auto) VALUES (NULL, '$name', '$email', '$comment', '$date')"; mysql_query($query, $connection) or die(mysql_error()); }?><html><head> <title>Guestbook</title></head><body><center><form action="<?php echo $_SERVER[PHP_SELF]; ?>" method="POST"> <font face="arial" size="1"> Name: <input type="text" name="txt_name"> Email: <input type="text" name ="txt_email"><br><br> Comment: <br> <textarea style="width: 75%" Rows="10" name="txt_comment"></textarea> <CENTER><input type="submit" value="Submit"></CENTER> </font></form><table bgcolor="#AAAAAA" border="0" width="75%" cellspacing="1" cellpadding="2"><?php $query = "SELECT * FROM guestbook ORDER BY date_order"; $result = mysql_query($query, $connection); for ($i=0; $i < mysql_num_rows($result); $i++) { $name = mysql_result($result, $i, "name"); $email = mysql_result($result, $i, "email"); $email_len = strlen($email); $comment = mysql_result($result, $i, "comment"); $comment = nl2br($comment); $date = mysql_result($result, $i, "date_auto"); $show_date = date("H:i:s m/d/Y", $date); if ($i % 2) { $bg_bolor="#EEEEEE"; } else { $bg_bolor="#E0E0E0"; } echo ' <tr> <td width="100%" bgcolor="'.bg_color.'"> <font face="arial" size="2">'; if ($email_len > 0) { echo '<b>Name:</b> <a href="mailto:'.$email.'">'.$name.'</a>'; } else { echo '<b>Name:</b> '.$name; } echo ' <br> <b>Comment:</b> '.$comment.' </font> <td> <td width="1%" valign="top" nowrap bgcolor="'.bg_color.'"> <font face="arial" size="2"> <b>Date: </b> '.$show_date.' </font> </td> </tr> '; }?></table></body></center></html>[/code] Quote Link to comment https://forums.phpfreaks.com/topic/11473-mysql_num_rows-error/ Share on other sites More sharing options...
shocker-z Posted June 8, 2006 Share Posted June 8, 2006 hi mate try this$result = mysql_query($query, $connection) or die(mysql_error());it will tell you if you have an error in your SQL statement as this will be what is causing your problem..I'm not 100% but dont you need to tell it how to order? DESC or ASCtry this$query = "SELECT * FROM guestbook ORDER BY date_order DESC";should resolve your issue, have left the or die(mysql_error()); as this is very handy to see what is wrong with the query :smiley:RegardsLiam Quote Link to comment https://forums.phpfreaks.com/topic/11473-mysql_num_rows-error/#findComment-43103 Share on other sites More sharing options...
wing_zero Posted June 8, 2006 Author Share Posted June 8, 2006 thanks :) works now. i had a field written wrong. was date_order as oppose to date_auto in the $query variable :$ Quote Link to comment https://forums.phpfreaks.com/topic/11473-mysql_num_rows-error/#findComment-43106 Share on other sites More sharing options...
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