get value from MySQL database with PHP

Question

$from = $_POST[\'from\'];
$to = $_POST[\'to\'];
$message = $_POST[\'message\'];

$query  = \"SELECT * FROM Users WHERE `user_name` = \'$from\' LIMIT 1\";
$result = m         


        

Answer 1

Try this:

$from = mysql_real_escape_string($_POST['from']);
$to = mysql_real_escape_string($_POST['to']);
$message = mysql_real_escape_string($_POST['message']);

$query  = "SELECT * FROM Users WHERE user_name = '$from' LIMIT 1";
$result = mysql_query($query) or die(mysql_error());

while($row = mysql_fetch_assoc($result)) {
    $fromID = $row['user_id'];
}

Also, make sure that:

• You have connected to the database
• You do get data from the post, try var_dump with your vars eg var_dump($from)

Answer 2

Use mysql_fetch_assoc instead

Answer 3

though it should. try this code

$from    = mysql_real_escape_string($_POST['from']);
$to      = mysql_real_escape_string($_POST['to']);
$message = mysql_real_escape_string($_POST['message']);

$query  = "SELECT * FROM Users WHERE `user_name` = '$from' LIMIT 1";
$result = mysql_query($query) or trigger_error(mysql_error().$query);
$row = mysql_fetch_array($result, MYSQL_ASSOC);
$fromID = $row['user_id'];
echo $fromID;

if it will throw no errors but still print no id, add this line

var_dump($row);

and post here it's output

not that you shouldn't use a user name but user id to address particular user.

Answer 4

while($row =mysql_fetch_assoc($result)){ $fromID = $row['user_id']; }