I have a simple question but yet i don't know. I would like to display message first before redirect to other page, but my code just directly redirect the page without display the message, or the display time is too short am not sure.. my code as below.. pls advise. thank much.
echo "Please Log In First";
header("location: login6.php");
You can't do it that way. PHP header must sent out before any content, so the correct order is:
header("location: login6.php");
echo "Please Log In First";
But these codes will redirect instantly and wouldn't let you see the content. So I would do the redirection by JavaScript:
echo "Please Log In First";
echo "<script>setTimeout(\"location.href = 'http://www.example.com';\",1500);</script>";
You can use header refresh. It will wait for specified time before redirecting. You can display your message then.
header( "refresh:5; url=login.php" ); //wait for 5 seconds before redirecting
HTTP refresh redirect to wait 5 seconds:
header('Refresh:5; url=login6.php');
echo 'Please Log In First';
A redirect is a redirect ;-)
If you tell a browser by using a Location: header to redirect to another page, the browser does just this: It redirects to the other page. And the browser does this immediately - without any delay.
Therefore, your echo won't display at all.
Set headers first
Furthermore, you need to set headers before each other output operation (as pointed out by Fred -ii-):
// First, echo headers
header("location: login6.php");
// Then send any other HTML-output
echo "Please Log In First";
Better not use auto-redirects
Quite likely, you won't show a message and then - after a certain amount of time - automatically redirect to another page. People might get confused by this process. Better do this:
Show the login-page and present a user-hinter or error-message on this page.
General solution
Prepare a component in the user's session, that contains information to be displayed at the next script instance. This component might be a list of messages like this:
$_SERVER[ 'sys$flashMessagesForLater' ] = array(
"Sorry, userID and password didn't match.",
"Please login again."
);
Each time a script request comes in, check if $_SERVER[ 'sys$flashMessagesForLater' ] is a non-empty array.
If this is the case, emit these values to a well-defined located on the generated HTML-page. A well-defined location would always be at the same location, somewhere at the top of each page. You might probably wish to add a read box around error messages.
You might want to prepare a class like this:
class CFlashMessageManager {
static public function addFlashMessageForLater( $message ) {
$_SERVER[ 'sys$flashMessagesForLater' ][] = $message;
}
static public function flashMessagesForLaterAvailable() {
return isset( $_SERVER[ 'sys$flashMessagesForLater' ] )
&& is_array( $_SERVER[ 'sys$flashMessagesForLater' ] )
&& ( 0 < count( $_SERVER[ 'sys$flashMessagesForLater' ] ))
;
}
static public function getFlashMessageForLaterAsHTML() {
return implode( '<br />', $_SERVER[ 'sys$flashMessagesForLater' ] );
}
} // CFlashMessageManager
You can do a html redirection : put this in you head
<meta http-equiv="refresh" content="5; url=http://example.com/">
And the page will be redirected after 5 seconds (change the 5 to the number of seconds you want)
Working example in php.
echo "<script>";
echo " alert('Import has successfully Done.');
window.location.href='".site_url('home')."';
</script>";
try sleep function
<?php
sleep(10);//seconds to wait..
echo "Please Log In First";
header("location: login6.php");
?>
