使用js与php错误

Question

hey guys i have a database and am trying to fetch some result ..and i can succesfully fetch the result with php..What i need is to run the result after 3 seconds ..So i used 'setTimeout()` in js but it didnt worked out..My code

<?php
$dbhost = 'localhost';
$dbuser = 'root';
$dbpass = '';
@$conn = mysql_connect($dbhost, $dbuser, $dbpass);
if(! $conn )
{
  die('Could not connect: ' . mysql_error());
}


$sql = 'SELECT age FROM honey';
mysql_select_db('test');
$retval = mysql_query( $sql, $conn );
if(! $retval )
{
  die('Could not get data: ' . mysql_error());
}
while($row = mysql_fetch_array($retval, MYSQL_ASSOC))
{
 echo    '<script> 
 var c = 3000;
setTimeout(function() { '<?php echo $row['age'];'}, c);
 </script>';
}
mysql_close($conn);
?>

The error i get is Parse error: syntax error, unexpected '?' in C:\wamp\wwwefresh\index.php on line 24 ..

how can i properl use js inside this php code..Thanx for the help

Answer 1

You cannot use client-side JS "inside" your server-side PHP. PHP is parsed and run on the server side before your client even gets (and parses and executes) the resulting JS. If you need to set a timer, you either need to do it on the server (yuck) or do it on the client (having the client issue another call to the server).