[Qual] Uniformize code

htdocs/contrat/card.php

htdocs/contrat/contact.php

htdocs/core/actions_builddoc.inc.php

htdocs/core/actions_extrafields.inc.php

htdocs/core/actions_sendmails.inc.php

htdocs/core/actions_setnotes.inc.php

htdocs/core/class/extrafields.class.php

htdocs/core/class/html.formmail.class.php

htdocs/core/lib/files.lib.php

htdocs/core/photos_resize.php

htdocs/core/tpl/document_actions_pre_headers.tpl.php