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                ## **多進程寫文件,如何保證都寫成功** 方案一: ~~~php function writeData($filepath, $data) { $fp = fopen($filepath,'a'); do{ usleep(100); }while (!flock($fp, LOCK_EX)); //LOCK_EX 取得獨占鎖定(寫入的程序)進行排它型鎖定 獲取鎖 有鎖就寫入,沒鎖就得 $res = fwrite($fp, $data."\n"); flock($fp, LOCK_UN); //LOCK_UN 釋放鎖定(無論共享或獨占)。 fclose($fp); return $res; } ~~~ 方案二(自己做標記): ~~~ function write_file($filename, $content) { $lock = $filename . '.lck'; $write_length = 0; while(true) { if( file_exists($lock) ) { usleep(100); } else { touch($lock); $write_length = file_put_contents($filename, $content, FILE_APPEND); break; } } if( file_exists($lock) ) { unlink($lock); } return $write_length; } ~~~ 方案三: > 使用隊列
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