Description:
------------
Prior to PHP7.2.0 SplFileObject::seek would return false if the seeked line did not exists. Since PHP7.2.0 it returns the last line of the file instead.

see https://3v4l.org/pl0Kg

Test script:
---------------
<?php

$expected = [
    ['john', 'doe', 'john.doe@example.com', '0123456789'],
    ['jane', 'doe', 'jane.doe@example.com'],
];

$tmp = new SplTempFileObject();
foreach ($expected as $row) {
    $tmp->fputcsv($row);
}
$tmp->setFlags(0);
$tmp->seek(23);
var_dump($tmp->current()); //expected false
$tmp->setFlags(SplFileObject::READ_CSV | SplFileObject::SKIP_EMPTY);
$tmp->seek(23);
var_dump($tmp->current());  //expected false (get the last row instead)