CLI Retro Logging

<?php
function ob_logstdout($chunk, $phase) {
	$msec = substr(explode(' ', microtime())[0], 2, 4);
	$return_chunk = '';
	if(substr($chunk, -1) == "\n") {
		$chunk = substr($chunk, 0, -1);
	}
	$lines = explode("\n", $chunk);
	foreach($lines as $line) {
		$line = date('[m-d-y h:i:s.') . $msec . date(' A] ') . $line . "\n";
		file_put_contents(ROOTDIR . '/data/scraper-lastlog', $line, FILE_APPEND);
		$return_chunk .= $line;
	}
	return $return_chunk;
}
ob_start('ob_logstdout', 2);