PHP ftell函数代码示例

 /**
  * Fetches the next item from the stream using defined behavior
  * 
  * @param resource $stream_handle The stream handle that is being use in the current context
  *
  * @access public
  *
  * @return string A single character or null if FEOF
  */
 public function next($stream_handle)
 {
     //If feof, end it
     if (feof($stream_handle)) {
         return null;
     }
     //Extract the character
     $c = ($c = fgetc($stream_handle)) === false ? null : $c;
     //If character is 195 (utf8 control character)
     if ($c !== null && ord($c) == 195) {
         $c .= fgetc($stream_handle);
     }
     //If character is 195 (utf8 control character)
     if ($c !== null && ord($c) == 239) {
         //Get the next two characters and seek back if not UTF8 bom
         $c2 = fgetc($stream_handle);
         $c3 = fgetc($stream_handle);
         if (ord($c2) == 187 && ord($c3) == 191) {
             //Ok, BOM skipped, read next char using defined next method (to support possible UTF-8 chars)
             $c = $this->next($stream_handle);
         } else {
             //Seek back 2 characters, it was not a UTF-8 BOM
             fseek($stream_handle, ftell($stream_handle) - 2);
         }
     }
     //Return it
     return $c;
 }

 protected function execute(InputInterface $input, OutputInterface $output)
 {
     $filename = $input->getArgument('filename');
     if (!$filename) {
         if (0 !== ftell(STDIN)) {
             throw new \RuntimeException('Please provide a filename or pipe file content to STDIN.');
         }
         $content = '';
         while (!feof(STDIN)) {
             $content .= fread(STDIN, 1024);
         }
         return $this->display($input, $output, array($this->validate($content)));
     }
     if (0 !== strpos($filename, '@') && !is_readable($filename)) {
         throw new \RuntimeException(sprintf('File or directory "%s" is not readable', $filename));
     }
     $files = array();
     if (is_file($filename)) {
         $files = array($filename);
     } elseif (is_dir($filename)) {
         $files = Finder::create()->files()->in($filename)->name('*.yml');
     } else {
         $dir = $this->getApplication()->getKernel()->locateResource($filename);
         $files = Finder::create()->files()->in($dir)->name('*.yml');
     }
     $filesInfo = array();
     foreach ($files as $file) {
         $filesInfo[] = $this->validate(file_get_contents($file), $file);
     }
     return $this->display($input, $output, $filesInfo);
 }

 /**
  * Get value for a named parameter.
  *
  * @param mixed $parameter Parameter to get a value for
  * @param array $argv Argument values passed to the script when run in console.
  * @return mixed
  */
 public function getValueForParameter($parameter, $argv = array())
 {
     // Default value
     $parameterValue = null;
     // Check STDIN for data
     if (ftell(STDIN) !== false) {
         // Read from STDIN
         $fs = fopen("php://stdin", "r");
         if ($fs !== false) {
             /*
             				while (!feof($fs)) {
             					$data = fread($fs, 1);
             					var_dump($data);
             					$parameterValue .= $data;
             				} */
             $parameterValue = stream_get_contents($fs);
             fclose($fs);
         }
         // Remove ending \r\n
         $parameterValue = rtrim($parameterValue);
         if (strtolower($parameterValue) == 'true') {
             $parameterValue = true;
         } else {
             if (strtolower($parameterValue) == 'false') {
                 $parameterValue = false;
             }
         }
     }
     // Done!
     return $parameterValue;
 }

 function tell() : int
 {
     if (!is_resource($this->resource) || ($pos = ftell($this->resource)) === FALSE) {
         throw new \RuntimeException('Could not tell the position');
     }
     return $pos;
 }

function _fstrpos($resource, $str, $direction = 1)
{
    $pos = ftell($resource);
    $buff = fgets($resource);
    fseek($resource, $pos);
    return $pos + ($direction == 1 ? strpos($buff, $str) : strrpos($buff, $str));
}

  */
 public function mkdir($savepath)
 {
     return true;
 }
 /**
  * 保存指定文件
  * @param  array   $file    保存的文件信息
  * @param  boolean $replace 同名文件是否覆盖
  * @return boolean          保存状态，true-成功，false-失败
  */
 public function save($file, $replace = true)
 {
     $header['Content-Type'] = $file['type'];
     $header['Content-MD5'] = $file['md5'];
     $header['Mkdir'] = 'true';
     $resource = fopen($file['tmp_name'], 'r');
     $save = $this->rootPath . $file['savepath'] . $file['savename'];
     $data = $this->request($save, 'PUT', $header, $resource);
     return false === $data ? false : true;
 }
 /**
  * 获取最后一次上传错误信息
  * @return string 错误信息
  */
 public function getError()
 {
     return $this->error;
 }
 /**
  * 请求又拍云服务器
  * @param  string   $path    请求的PATH
  * @param  string   $method  请求方法
  * @param  array    $headers 请求header
  * @param  resource $body    上传文件资源
  * @return boolean
  */
 private function request($path, $method, $headers = null, $body = null)
 {
     $uri = "/{$this->config['bucket']}/{$path}";
     $ch = curl_init($this->config['host'] . $uri);
     $_headers = array('Expect:');
     if (!is_null($headers) && is_array($headers)) {
         foreach ($headers as $k => $v) {
             array_push($_headers, "{$k}: {$v}");
         }
     }
     $length = 0;
     $date = gmdate('D, d M Y H:i:s \\G\\M\\T');
     if (!is_null($body)) {
         if (is_resource($body)) {
             fseek($body, 0, SEEK_END);
             $length = ftell($body);
             fseek($body, 0);
             array_push($_headers, "Content-Length: {$length}");
             curl_setopt($ch, CURLOPT_INFILE, $body);
             curl_setopt($ch, CURLOPT_INFILESIZE, $length);
         } else {
             $length = @strlen($body);
             array_push($_headers, "Content-Length: {$length}");
             curl_setopt($ch, CURLOPT_POSTFIELDS, $body);

 protected function execute(InputInterface $input, OutputInterface $output)
 {
     if (false !== strpos($input->getFirstArgument(), ':l')) {
         $output->writeln('<comment>The use of "yaml:lint" command is deprecated since version 2.7 and will be removed in 3.0. Use the "lint:yaml" instead.</comment>');
     }
     $filename = $input->getArgument('filename');
     if (!$filename) {
         if (0 !== ftell(STDIN)) {
             throw new \RuntimeException('Please provide a filename or pipe file content to STDIN.');
         }
         $content = '';
         while (!feof(STDIN)) {
             $content .= fread(STDIN, 1024);
         }
         return $this->display($input, $output, array($this->validate($content)));
     }
     if (0 !== strpos($filename, '@') && !is_readable($filename)) {
         throw new \RuntimeException(sprintf('File or directory "%s" is not readable', $filename));
     }
     $files = array();
     if (is_file($filename)) {
         $files = array($filename);
     } elseif (is_dir($filename)) {
         $files = Finder::create()->files()->in($filename)->name('*.yml');
     } else {
         $dir = $this->getApplication()->getKernel()->locateResource($filename);
         $files = Finder::create()->files()->in($dir)->name('*.yml');
     }
     $filesInfo = array();
     foreach ($files as $file) {
         $filesInfo[] = $this->validate(file_get_contents($file), $file);
     }
     return $this->display($input, $output, $filesInfo);
 }

 /**
  * Returns file size by seeking at the end of file
  * @see http://www.php.net/manual/en/function.filesize.php#79023
  * @see http://www.php.net/manual/en/function.filesize.php#102135
  * @param string $path Full path to file
  * @return BigInteger
  * @throws Exception
  */
 public function getFileSize($path)
 {
     // This should work for large files on 64bit platforms and for small files everywhere
     $fp = fopen($path, "rb");
     if (!$fp) {
         throw new Exception("Cannot open specified file for reading.");
     }
     $flockResult = flock($fp, LOCK_SH);
     $seekResult = fseek($fp, 0, SEEK_END);
     $position = ftell($fp);
     flock($fp, LOCK_UN);
     fclose($fp);
     // TODO: There is *hope* that ftell() or fseek() fails when file is over 4GB
     // TODO: This really needs tests, any ideas how to test this in CI? (please let me know)
     if ($flockResult === false) {
         throw new Exception("Couldn't get file lock. Operation abandoned.");
     }
     if ($seekResult !== 0) {
         throw new Exception("Seeking to end of file failed");
     }
     if ($position === false) {
         throw new Exception("Cannot determine position in file. ftell() failed.");
     }
     // PHP uses internally (in C) UNSIGNED integer for file size.
     // PHP uses signed implicitly
     // convert signed (max val +2^31) -> unsigned integer will extend range for 32-bit to (+2^32)
     return BigInteger::of(sprintf("%u", $position));
 }

 /**
  * {@inheritdoc}
  */
 public function fire()
 {
     $this->twig = $this->laravel['twig'];
     $format = $this->option('format');
     // Check STDIN for the template
     if (ftell(STDIN) === 0) {
         // Read template in
         $template = '';
         while (!feof(STDIN)) {
             $template .= fread(STDIN, 1024);
         }
         return $this->display([$this->validate($template)], $format);
     }
     $files = $this->getFiles($this->argument('filename'), $this->option('file'), $this->option('directory'));
     $details = [];
     foreach ($files as $file) {
         try {
             $template = $this->getContents($file);
         } catch (Twig_Error_Loader $e) {
             throw new RuntimeException(sprintf('File or directory "%s" is not readable', $file));
         }
         $details[] = $this->validate($template, $file);
     }
     return $this->display($details, $format);
 }

function tail($file, &$pos)
{
    // get the size of the file
    if (!$pos) {
        $pos = filesize($file);
    }
    // Open an inotify instance
    $fd = inotify_init();
    // Watch $file for changes.
    $watch_descriptor = inotify_add_watch($fd, $file, IN_ALL_EVENTS);
    // Loop forever (breaks are below)
    while (true) {
        // Read events (inotify_read is blocking!)
        $events = inotify_read($fd);
        // Loop though the events which occured
        foreach ($events as $event => $evdetails) {
            // React on the event type
            switch (true) {
                // File was modified
                case $evdetails['mask'] & IN_MODIFY:
                    // Stop watching $file for changes
                    inotify_rm_watch($fd, $watch_descriptor);
                    // Close the inotify instance
                    fclose($fd);
                    // open the file
                    $fp = fopen($file, 'r');
                    if (!$fp) {
                        return false;
                    }
                    // seek to the last EOF position
                    fseek($fp, $pos);
                    // read until EOF
                    while (!feof($fp)) {
                        $buf .= fread($fp, 8192);
                    }
                    // save the new EOF to $pos
                    $pos = ftell($fp);
                    // (remember: $pos is called by reference)
                    // close the file pointer
                    fclose($fp);
                    // return the new data and leave the function
                    return $buf;
                    break;
                    // File was moved or deleted
                // File was moved or deleted
                case $evdetails['mask'] & IN_MOVE:
                case $evdetails['mask'] & IN_MOVE_SELF:
                case $evdetails['mask'] & IN_DELETE:
                case $evdetails['mask'] & IN_DELETE_SELF:
                    // Stop watching $file for changes
                    inotify_rm_watch($fd, $watch_descriptor);
                    // Close the inotify instance
                    fclose($fd);
                    // Return a failure
                    return false;
                    break;
            }
        }
    }
}

 /**
  * @param Request $request
  * @param Response $response
  */
 public function render(Request $request, Response $response)
 {
     if (!$this->environment->isSilent()) {
         header('HTTP/1.1 ' . $response->getStatusCode() . ' ' . $response->getStatusMessage());
         foreach ($response->getHeaders() as $name => $value) {
             header($name . ': ' . $value);
         }
     }
     if ($response->getStatusCode() < 299) {
         $startRange = 0;
         $endRange = filesize($response->getContent()) - 1;
         try {
             $contentRange = $response->getHeader('Content-Range');
             if (preg_match('/^bytes ([0-9]+)-([0-9]+)\\/([0-9]+)$/', $contentRange, $match)) {
                 $startRange = (int) $match[1];
                 $endRange = (int) $match[2];
             }
         } catch (HeaderNotFoundException $e) {
             //skipp
         }
         $buffer = 1024 * 8;
         $file = @fopen($response->getContent(), 'rb');
         fseek($file, $startRange);
         while (!feof($file) && ($p = ftell($file)) <= $endRange) {
             if ($p + $buffer > $endRange) {
                 $buffer = $endRange - $p + 1;
             }
             set_time_limit(0);
             echo fread($file, $buffer);
             flush();
         }
         fclose($file);
     }
 }

 function stream_tell()
 {
     if (!empty($this->stream)) {
         return ftell($this->stream);
     }
     return $this->pos;
 }

 protected function execute(InputInterface $input, OutputInterface $output)
 {
     $twig = $this->getContainer()->get('twig');
     $template = null;
     $filename = $input->getArgument('filename');
     if (!$filename) {
         if (0 !== ftell(STDIN)) {
             throw new \RuntimeException('Please provide a filename or pipe template content to stdin.');
         }
         while (!feof(STDIN)) {
             $template .= fread(STDIN, 1024);
         }
         return $this->validateTemplate($twig, $output, $template);
     }
     if (0 !== strpos($filename, '@') && !is_readable($filename)) {
         throw new \RuntimeException(sprintf('File or directory "%s" is not readable', $filename));
     }
     if (is_file($filename)) {
         $files = array($filename);
     } elseif (is_dir($filename)) {
         $files = Finder::create()->files()->in($filename)->name('*.twig');
     } else {
         $dir = $this->getApplication()->getKernel()->locateResource($filename);
         $files = Finder::create()->files()->in($dir)->name('*.twig');
     }
     $errors = 0;
     foreach ($files as $file) {
         $errors += $this->validateTemplate($twig, $output, file_get_contents($file), $file);
     }
     return $errors > 0 ? 1 : 0;
 }

 /**
  * Returns file size by using native fseek function
  *
  * @see http://www.php.net/manual/en/function.filesize.php#79023
  * @see http://www.php.net/manual/en/function.filesize.php#102135
  *
  * @return string | bool (false when fail)
  */
 private function sizeNativeSeek()
 {
     // This should work for large files on 64bit platforms and for small files every where
     $fp = fopen($this->path, "rb");
     flock($fp, LOCK_SH);
     if (!$fp) {
         return false;
     }
     $res = fseek($fp, 0, SEEK_END);
     if ($res === 0) {
         $pos = ftell($fp);
         flock($fp, LOCK_UN);
         fclose($fp);
         // $pos will be positive int if file is <2GB
         // if is >2GB <4GB it will be negative number
         if ($pos >= 0) {
             return (string) $pos;
         } else {
             return sprintf("%u", $pos);
         }
     } else {
         flock($fp, LOCK_UN);
         fclose($fp);
         return false;
     }
 }

function vdk_pack($vdk, $dirname, &$table = [], &$folders = 0, $parent = null)
{
    if (!($folder = scandir($dirname))) {
        return;
    }
    usort($folder, 'strcasecmp');
    if (is_null($parent)) {
        array_splice($folder, 1, 1);
    }
    $current = ftell($vdk);
    $last = count($folder) - 1;
    foreach ($folder as $i => $filename) {
        echo $pathname = "{$dirname}/{$filename}", "\n";
        if (is_dir($pathname)) {
            $start = ftell($vdk);
            fseek($vdk, 145, SEEK_CUR);
            if (!in_array($filename, ['.', '..'])) {
                vdk_pack($vdk, $pathname, $table, $folders, $current);
                $folders++;
            }
            $end = ftell($vdk);
            fseek($vdk, $start);
            fwrite($vdk, pack('Ca128V4', 1, $filename, 0, 0, $filename == '..' ? $parent : $start + ($filename == '.' ? 0 : 145), $i == $last ? 0 : $end));
            fseek($vdk, $end);
        } else {
            $table[$pathname] = ftell($vdk);
            $data = gzcompress(file_get_contents($pathname), $GLOBALS['level']);
            fwrite($vdk, pack('Ca128V4', 0, $filename, filesize($pathname), $size = strlen($data), 0, $i == $last ? 0 : $table[$pathname] + 145 + $size) . $data);
        }
    }
}