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This warning indicates that the PHP script has attempted to modify header information after output has already begun. In this instance, the output was initiated in the file `lib.php` at line 1, which prevents any subsequent header modifications. This error can commonly arise in PHP when there are spaces or invisible characters before the opening `<?php` tag. To resolve this issue, ensure that there is no output before headers are set.
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<br /> <b>Warning</b>: Cannot modify header information - headers already sent by (output started at /home2/mobiletv/public_html/mrs-claassen.co.za/lib.php:1) in <b>/home2/mobiletv/public_html/mrs-claassen.co.za/lib.php</b> on line <b>21</b><br />