PHP error with mysql_fetch_array():

CMS & WordPress
1

Hi all,
I’ve got a bunch of code, but it doesn’t work for some reason. It show this “Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in /xxx/requires/functions.php on line 25”
index.php

<?php
require('requires/header.php');
$dataToDisplay = getData();
for($i = 0; $i < count($dataToDisplay); $i++)
{
	if(isset($_POST['sb'.$i]))
	{
		writeData($_POST['userName'.$i], $_POST['password'.$i], $_POST['languageId'.$i]);
		header("location: ".$_SERVER['PHP_SELF']."");
	}
}
echo '<h1>Demo Website</h1>';
echo '<form action="'.$_SERVER['PHP_SELF'].'" method="post"><fieldset>';
echo '<table>
	<tr>
		<th>Username</th>
		<th>Password</th>
		<th>Language ID</th>
	</tr>';
for($i = 0; $i < count($dataToDisplay); $i++)
{
	echo '<tr>';
	echo '<td><input type="text" name="userName'.$i.'" readonly="readonly" value="'.$dataToDisplay[$i]['userName'].'" /></td>';
	echo '<td><input type="text" name="password'.$i.'" value="'.$dataToDisplay[$i]['password'].'" /></td>';
	echo '<td><input type="text" name="languageId'.$i.'" value="'.$dataToDisplay[$i]['languageId'].'" /></td>';
	echo '</tr>';
}
echo '</table>';
echo '</fieldset>
	</form>';
require('requires/footer.php');
?>

functions.php

<?php
require('dbHandler.php');
function getData()
{
	// Connect to MySQL
	$link = mysql_connect(DB_HOST, DB_USER, DB_PASSWD);
	// Check connection
	if (!$link)
	{
		return FALSE;
	}
	// Select DB
	mysql_select_db(DB_IC, $link);
	$dataQuery = mysql_query(QR_GETDATA);
	// Bind results
	$dataArray = array();
	$i = 0;
	while($row = mysql_fetch_array($dataQuery))
	{	
		$dataArray[$i]['userName'] = $row["userName"];
		$dataArray[$i]['password'] = $row["password"];
		$dataArray[$i]['languageId'] = $row["languageId"];
		$i++;
	}
	// Close connection
	mysql_close($link);
	return $dataArray;
}
function writeData($userName, $password, $languageId)
{
	// Connect to MySQL
	$link = mysql_connect(DB_HOST, DB_USER, DB_PASSWD);
	// Check connection
	if (!$link)
	{
		return FALSE;
	}
	// Select DB
	mysql_select_db(DB_IC, $link);
	mysql_query("UPDATE user SET userName = '$userName' WHERE Id = $id");
	// Close connection
	mysql_close($link);
	return TRUE;
}
?>

Thanks for help.
BTW- MySql database is set up correctly.

2

Try this:



  $link = mysql_connect(DB_HOST, DB_USER, DB_PASSWD);

  mysql_select_db(DB_IC, $link);
  $dataQuery = mysql_query(QR_GETDATA);

  # Debug stuff start
  echo 'SQL: ' .QR_GETDATA;

  echo '<pre>';
     # verbose version
         var_dump( mysql_fetch_array($dataQuery) );  

     # slim version not showing variable types
     # print_r( mysql_fetch_array($dataQuery)  ) ; 

  echo '</pre>';
  die;
  # Debug stuff end

Edit: I forgot to mention that the message shows a Warning and not an Error. The code above will display the row results and you should be able to pinpoint your problem.

3

Thanks for help, found the way out :wink: