$headder in php

PHP
<html>
<?php
/* This will give an error. Note the output
 * above, which is before the header() call */
header('Location: http://www.example.com/');
exit;
?>

<?php
/*
	This will redirect  to facebook.com
*/
$url = "https://facebook.com.com";
header("Location: $url");  
exit;
?>
Source

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