Make Page hits using file function

<?php
function set_count($file = 'counter.txt'){

if(file_exists($file)){

  //read the value of the file
$handle= fopen($file, 'r');

//increase it by one
$count = (int) fread($handle, 20) + 1;

//write the value in file
$handle= fopen($file, 'w');
fwrite($handle, $count);
fclose($handle);

}
else{
//creat it
  $handle = fopen($file, 'w+');

  //set the defualt value 1
  fwrite($handle, 1);
  fclose($handle);

$count= 1;
}
return $count;
}

echo set_count();

?>