Question

I’m trying to display a "Welcome back, <name>." to my blog when I log in back. I’m using php to access the database, get the name and last name of the username currently in $_SESSION['username'], and then print it back in the index.

So the function to query the database is:

 function get_full_name($username){

    $real = array();

    $query = mysql_query("SELECT `name`, `last` FROM `users` WHERE `user` = `{$username}`");

    $row = mysql_num_rows($query);

    foreach($row as $k => $v)
    {
        $real[$k] = $v;
    }

       return $real;
  }

Then the part of the html where it calls the function above:

<div id="menu">
    <?php 
            $temp = $_SESSION['username'];
            $real[] = get_full_name($temp);
            if(isset($_SESSION['username']))
            {
                echo '<br />'.'Welcome back, '. $real['name'] . '.';
            }
    ?>
    </div>

The output of the above codes is:

 Welcome back, .

var_dump($real) gives:

array(1) { [0]=> array(0) { } } 

var_dump($real) after changing to mysql_fectch_assoc:

array(0) { }

• Fixed: The error was not using the single quotes ‘ {$username} ‘

By changing them, it worked like a charm, cheers to all!

Answer 1

Your get_full_name() function should be like this:

function get_full_name($username) {
   $real  = array();
   $query = mysql_query("SELECT `name`, `last` 
                         FROM `users` 
                         WHERE `user` = '{$username}'");
   if (mysql_num_rows($query)) {
     $real = mysql_fetch_assoc($query);
   }

   return $real;
}

Notes:

• Use single quotes for the variable: '{$username}' instead of `{$username}`
• Use mysql_num_rows() for checking if the result is not empty.
• Use mysql_fetch_assoc() for retrieving the row.

Calling the function:

$temp = $_SESSION['username'];
$real = get_full_name($temp);
if (isset($temp) && count($real)) {
   echo '<br />Welcome back, '. $real['name'] . '.';
}

Notes:

• Use $real instead of $real[].
• Check if $real empty with count().