PHP Extension

Remove a Header Field from an Email

Demonstrates the Chilkat Email.RemoveHeaderField method, which removes by name all occurrences of a header field. Header-field names are case-insensitive, and every repeated occurrence with the given name is removed. This example adds a custom header, then removes it.

Background: Editing a message sometimes means deleting a header outright — stripping a tracking header, removing an X- flag before forwarding, or clearing a stale field before re-sending. Because a field name can appear more than once (like Received), RemoveHeaderField removes all matching occurrences in one call rather than just the first.

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<?php

include("chilkat.php");

//  Demonstrates the RemoveHeaderField method, which removes by name all occurrences of a
//  header field.  Header-field names are case-insensitive.

$email = new CkEmail();
$email->put_Subject('Remove header field');
$email->put_From('alice@example.com');

$email->AddHeaderField('X-Custom-Header','some value');

//  Use HasHeaderMatching to test for the header's presence.  ("*" matches any value.)
$hasBefore = $email->HasHeaderMatching('X-Custom-Header','*',false);
print 'Has X-Custom-Header before: ' . $hasBefore . "\n";

//  Remove all occurrences of the header field.
$email->RemoveHeaderField('X-Custom-Header');

$hasAfter = $email->HasHeaderMatching('X-Custom-Header','*',false);
print 'Has X-Custom-Header after: ' . $hasAfter . "\n";

?>