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HTTP headers are what is sent to the browser before the page markup. They often include the page MIME type, charset, status code and encoding. Headers are often overridden to change the page MIME type or redirect the user.
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How to prevent page from resubmit on refresh when “Cannot modify header information - header...
The problem is that if i put header("location...) it shows me the message
Warning: Cannot modify header information - headers already sent by
(output started at
C:\xampp\htdocs\WP\wp-content\themes … .= "Content-Type: text/html; charset=utf-8";
$headers .= "Content-Transfer-Encoding: 8bit";
try {
$mail->send();
$msg = "An email has been sent for verfication …