» Braucht man für file_put_contents ein LOCK_EX bei FILE_APPEND?

file_put_contents($file, $person, FILE_APPEND | LOCK_EX);

<?php
function string_rand($len, $split="\n") {
	return substr(chunk_split(bin2hex(openssl_random_pseudo_bytes(ceil($len / 2))), 1023, $split), 0, $len);
}

ini_set('memory_limit', '200M');

if (!file_put_contents('file.txt', string_rand(102400000), FILE_APPEND)) {
	exit('file_put_contents() error!');
}

clearstatcache();
echo 'filesize: ' . filesize('file.txt') . PHP_EOL;

$fp = fopen('file.txt', 'r');
if ($fp) {
	while (($line = fgets($fp)) !== false) {
		if (strlen($line) != 1024) {
			exit('Line length error!');
		}
	}
	fclose($fp);
}
?>

Mach mit!