Writing Array to File w/o blank lines

I have been working on a script that manipulates arrays and now I am working on the part where the user can erase part of the array. Previously the function that writes the array to a file looked like: function updateSuspenderOrVehicleFile($fileToUpdate, $newDataArray) { $fileName = fopen( $fileToUpdate,"w"); for ($i=0; $i<count($newDataArray); $i++) { //don't write blank lines left by remove feature if ($newDataArray[$i] != "") { //check to see if on the last solution, if not add line break at end. if ($i+1 == count($newDataArray) || $newDataArray[$i +1] == "") fwrite($fileName,"$newDataArray[$i]"); else fwrite($fileName,"$newDataArray[$i]\r\n"); } } } The problem is that when a user erases part of the array, I just set it to array[$number] == "", which works except in the following cases. Lets say the user selects the last 2 array elements to erase, then when the function is called to write the array, it leaves a couple blank lines at the end of the file which messes up things later. Originally I though I would be easier to set the record they want to erase to "", but is there another way to say compress the whole array together or a better way to do this? Thanks for any ideas, Andrew V. Romero