note 130545 added to function.fopen

i had to do such function to display newest log entries on top to be displayed in browser its easy to adjust it from anonymous to normal function and/or add content on end most important is same log can be used by many threads/processes (Swoole, ReactPHP, php_fpm) also it had to keep reasonable size to load fast $prependFileThreadSafe = static function (string $file, string $content, int $maxLen = 1024*500): void { $f = fopen($file, 'c+'); flock($f, LOCK_EX); $prev = fread($f, $maxLen-strlen($content)); fseek($f, 0); fwrite($f, $content . $prev); flock($f, LOCK_UN); fclose($f); }; usage: $prependFileThreadSafe('my.log', "some content\n"); ---- Server IP: 45.112.84.4 Probable Submitter: 80.90.5.137 (proxied: 178.219.142.108) ---- Manual Page -- https://php.net/manual/en/function.fopen.php Edit -- https://main.php.net/note/edit/130545 Del: integrated -- https://main.php.net/note/delete/130545/integrated Del: useless -- https://main.php.net/note/delete/130545/useless Del: bad code -- https://main.php.net/note/delete/130545/bad+code Del: spam -- https://main.php.net/note/delete/130545/spam Del: non-english -- https://main.php.net/note/delete/130545/non-english Del: in docs -- https://main.php.net/note/delete/130545/in+docs Del: other reasons-- https://main.php.net/note/delete/130545 Reject -- https://main.php.net/note/reject/130545 Search -- https://main.php.net/manage/user-notes.php