是否可以在一个php文档中包含多个file（）标记

Is it possible to have multiple file() tags in one php document? I have a file in which I am reading data from another file using file() and I also have to delete the last line in another document which I am also using file() for but when I run the code it doesn't remove the last line in the other file.

The code that I am using to delete the last line:

function trim_lines($path, $max) { 
  // Read the lines into an array
  $lines = file($path);
  // Setup counter for loop
  $counter = 0;
  while($counter < $max) {
    // array_pop removes the last element from an array
    array_pop($lines);
    // Increment the counter
    $counter++;
  }  // End loop
  // Write the trimmed lines to the file
  file_put_contents($path, implode('', $lines));
}

This code works without a problem in a separate file but in this file it doesn't seem to work.

There is no point in me posting the whole php code because it's pretty long and this is just a general question that would have the same effect in any php file.

In my example at least this code has to be above the file() tag or under another tag but not directly under the file() tag.