php code help header error

[kako0000000]

Hello
i created website who Consist many pages.
but when i insert this command

<?php require('header.php') ?> body margen:0; ....... check i page example http://127.0.0.1/work/index.php page is open but page ( top space left ) see pic

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[astonecipher]

“Margin” is misspelled and is not in style tags.