<?php
	// {
		$file = 'big_file.txt';
		$bytes = 50000;
	// }
	$fopen = fopen($file, 'r');
	$i = 1;
	while(!feof($fopen)) {
		$total_resource = fgets($fopen, $bytes);
		$fopen2 = fopen($i.'_tom.txt', 'a');
		fwrite($fopen2, $total_resource);
		fclose($fopen2);
		$i++;
	}
	fclose($fopen);
?>