Question

我正在尝试将记录保存到文件中，当文件大于10MB时，应创建新文件。（这个过程同时发生。这就是我使用文件锁的原因）

但是，文件变为100KB时变为空。（它不会创建任何新文件，但会启动一个具有相同名称的空文件。）

我的代码有什么问题？锁定文件上的file_get_contents会返回null吗？任何建议或意见将不胜感激。

提前谢谢。

    $archiveSaveContents = [];
    $archiveSaveContents = 'some record';
    $archiveFileExtension = 'json';
    $archiveFilePath = FCPATH.'atch/driver_archive_location/'.$d->format('Y-m-d').'/'.$reqDate->format('H').'/';

    $archiveFiles = scandir($archiveFilePath);
    $archiveFiles = array_diff(scandir($archiveFilePath), array('.', '..'));

    $archiveFilePostfix = ( count($archiveFiles) <= 1 ) ? 1 : count($archiveFiles);

    $archiveFileName = DEVELOP_HOST.'_'.'driversLocation_'.$archiveFilePostfix.'.'.$archiveFileExtension;
    $archiveFullPath = $archiveFilePath.$archiveFileName;

    $archiveLimitSize = 10;
    $archiveFileSize = ( filesize($archiveFullPath ) * .0009765625) * .0009765625;

    if ( $archiveFileSize > $archiveLimitSize ) {
        $archiveFilePostfix = ( $archiveFilePostfix + 1 );
        $archiveFileName = DEVELOP_HOST.'_'.'driversLocation_'.$archiveFilePostfix.'.'.$archiveFileExtension;
        $archiveFullPath = $archiveFilePath.$archiveFileName;
    }

    $archiveFile = json_decode(file_get_contents($archiveFullPath),true);
    $archiveFile[] = $archiveSaveContents;

    if ( !is_dir($archiveFilePath) ) {
        @mkdir($archiveFilePath, 0777, TRUE);
        @chmod($archiveFilePath, 0777);
    }

    // if ( !$fp = @fopen($archiveFullPath, FOPEN_WRITE_CREATE) ) {
    if ( !$fp = @fopen($archiveFullPath, 'w+') ) {
        if ( false === $fp ) {
            throw new RuntimeException('Unable to open log file for writing');
        }

        return FALSE;
    }

    flock($fp, LOCK_EX);

    $write = fwrite($fp,json_encode($archiveFile));

    flock($fp, LOCK_UN);

    fclose($fp);

    @chmod($archiveFullPath, FILE_WRITE_MODE);

编辑代码：我怀疑文件不安全锁定。所以我在文件上使用了安全锁。但它仍然给我同样的错误。然后我发现在写文件的过程中，文件中json形式的字符串在写入时会被破坏。

    $archiveFileName = DEVELOP_HOST.'_'.'driversLocation_'.$archiveFilePostfix.'.'.$archiveFileExtension;
    $archiveFullPath = $archiveFilePath.$archiveFileName;

    if ( !is_dir($archiveFilePath) ) {
        @mkdir($archiveFilePath, 0777, TRUE);
        @chmod($archiveFilePath, 0777);
    }

    $archiveLimitSize = 10;
    $archiveFileSize = ( filesize($archiveFullPath ) * .0009765625) * .0009765625;

    if ( $archiveFileSize > $archiveLimitSize ) {
        $archiveFilePostfix = ( $archiveFilePostfix + 1 );
        $archiveFileName = DEVELOP_HOST.'_'.'driversLocation_'.$archiveFilePostfix.'.'.$archiveFileExtension;
        $archiveFullPath = $archiveFilePath.$archiveFileName;
    }

    $readFp = fopen($archiveFullPath, 'r');

    if ( $readFp ) {
        while (!flock($readFp, LOCK_SH)) { usleep(1); }
        $contents = fread($readFp, filesize($archiveFullPath));
        flock($readFp, LOCK_UN);
        fclose($readFp);

        if ( !$fp = @fopen($archiveFullPath, 'r+') ) {
            if ( false === $fp ) {
                throw new RuntimeException('Unable to open log file for writing');
            }

            return FALSE;
        }
    }
    else {
        if ( !$fp = @fopen($archiveFullPath, 'w+') ) {
            if ( false === $fp ) {
                throw new RuntimeException('Unable to open log file for writing');
            }

            return FALSE;
        }
    }

    $archiveFile = json_decode($contents);
    $archiveFile[] = $archiveSaveContents;

    $pieces = str_split(json_encode($archiveFile), 1024 * 4);

    while (!flock($fp, LOCK_EX)) { usleep(1); }
    foreach ( $pieces as $piece ) {
        fwrite($fp, $piece, strlen($piece));
    }
    fflush($fp);
    flock($fp, LOCK_UN);
    fclose($fp);

    @chmod($archiveFullPath, FILE_WRITE_MODE);

php文件在某个时刻变空

0 个答案: