Online PHP editor | output for DXe8i

<?php declare(strict_types=1); const LINES = 5; const INDEX = 10; $file_01 = new SplTempFileObject(); $file_02 = new SplFileObject('/tmp/test.txt', 'w+'); // write to files for ($i = 0; $i < LINES; $i++) { $file_01->fwrite("line {$i}" . PHP_EOL); $file_02->fwrite("line {$i}" . PHP_EOL); } // reset $file_01->rewind(); $file_02->rewind(); // seek $file_01->seek(INDEX); $file_02->seek(INDEX); // show results echo 'file_01: ' . $file_01->key(), PHP_EOL; echo 'file_02: ' . $file_02->key(), PHP_EOL;