Read and write a csv file in php

Hai,

      I need to read and write from csv file ,

and i am try this but its not working

 

 

$file = fopen("C:\Users\Downloads\workorder.csv","r");

$sno=1;
while (($line = fgetcsv($file)) !== FALSE) {
//$line is an array of the csv elements
print_r($line);
}
fclose($file);


?>