Error Message help for a newbie

bubbapuck

I am new to php and am getting a consitent error throughout my coding. Could someone please help me undertsand this error and what I can do to fix it.

Error:
Warning: Cannot modify header information - headers already sent by (output started at /home/ruffagu/public_html/admin/admin.php:19) in /home/ruffagu/public_html/admin/admin.php on line 68

I did not include the code becuase I have gotten this error many times. I was hoping for a simple explanation of what is happening.

Thanks... Bubba

Pig

headers (such as cookies or redirects) can only be sent before you have sent anything to the browser. Even a space before your opening <?php will cause this error. Either move everything below the header(), or use output buffering.

xblue

just an additional note:
if you don't call setcookie() or header(), keep in mind that session use cookies as well with the default configuration, so you might need to move the call to session_start() in case you use it.

jasonmills58

I'm havving the same problem, because i want to run some code in the background and then jump to a new page. it looks like this:

if ( isset( $username ) or isset( $password ) ) {
$dberror = " ";
$ret = add_to_database( $username, $password,
&$dberror );
if ( ! $ret )
print "Error: $dberror<BR>";
else
header("location: viewClients.php");
} else {
header("location: addNewClient.php");
}

i left out the databse part because it never gets that far.