href="files/eHealth%20flyer_Final/eHealth%20flyer_Final.pdf#zoom=100&view=Fit&pagemode=test&page=" class="pdfselector" target="_blank">

show code

<?php
$projectDesc = "eHealth flyer_Final";
$file["FILENAME"] = "eHealth flyer_Final";
$file["MODE"] = "test";

print ('href="files/'.rawurlencode($projectDesc).'/'.rawurlencode($file["FILENAME"]).'.pdf#zoom=100&view=Fit&pagemode='.$file["MODE"].'&page='.$file["PAGE"].'" class="pdfselector" target="_blank">');