Simple PHP function to remove the last line from text file not working

Question

I have a text file named test with only 2 lines:

1
2

I want to be able to remove the last line from the file so I use the foll

Answer 1

file function only returns you the contents of a file (as an array) - and whatever you do with that array, only changes the array, not the file. To persist the changes, write the contents back to the file:

$filename = 'test.txt';
$arr = file($filename);
if ($arr === false) {
  die('Failed to read ' . $filename);
}
array_pop($arr);
file_put_contents($filename, implode(PHP_EOL, $arr));