[php] comparation with database

programming
1

Hello
can anyone giveme a help here?
i have this

<?php if (!(strcmp($row_rs_autores['pdfs'],""))) {echo '<a href=' + $row_rs_autores['pdfs'] + '>Primeiras p&aacute;ginas</a>'; } ?>

What ihave to change to the comparation print the echo only when the row_rs_autores is empty? In this case he prints if its empty, i want it to print it’s its not empty**[SIZE=2][COLOR=#ff0000]
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