PHP redirect with header not working - php

Question

Here is my code:
<?php
$url = $_GET["id"];
$servername = "XXXX";
$username = "XXXX";
$password = "XXXX";
$dbname = "XXX";
$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "DELETE FROM Table WHERE id='".$url."'";
if ($conn->query($sql) === TRUE) {
echo 'Row deleted successfully';
} else {
echo "Error deleting record: " . $conn->error;
}
$conn->close();
header('Location:index.php');
exit;
?>
But header redirect is not working...
Here is the error log:
Strict Standards: header(): It is not safe to rely on the system's timezone settings. You are required to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EST/-5.0/no DST' instead in /homepages/5/d394578306/htdocs/XXXXX/XXXXXX/delete.php on line 24
Warning: Cannot modify header information - headers already sent by (output started at /homepages/5/d394578306/htdocs/XXXXX/XXXXXX/delete.php:1) in /homepages/5/d394578306/htdocs/XXXXXX/XXXXXX/delete.php on line 24

Answer 1

<?php
Delete the whitespace before the PHP tag - that counts as output and will stop the header() call from working.
You're also doing some echo calls, both of which will also stop the redirect from working as echo will output content/headers to the browser.

Answer 2

It appears to me that the timezone warning of the header causes the output, which in turn makes the function itself not work. Try doing this:
#header('Location:index.php')
The # will suppress error output for that particular function call.
Also, as Bulk correctly pointed out, you should disable your echo calls in lines 17 and 19, or move them below the header method call.

Answer 3

Based on the timezone error, try this:
<?php
date_default_timezone_set("--HERE YOUR TIMEZONE---");
$url = $_GET["id"];
$servername = "XXXX";
$username = "XXXX";
$password = "XXXX";
$dbname = "XXX";
$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "DELETE FROM Table WHERE id='".$url."'";
if ($conn->query($sql) === TRUE) {
echo 'Row deleted successfully';
} else {
echo "Error deleting record: " . $conn->error;
}
$conn->close();
header('Location:index.php');
exit;
?>
Now replace the "--HERE YOUR TIMEZONE---".
Here you can find the correct timezone for your country: http://php.net/manual/en/timezones.php