PHP fread函数代码示例

 private function getRandomBytes($count)
 {
     $bytes = '';
     if (function_exists('openssl_random_pseudo_bytes') && strtoupper(substr(PHP_OS, 0, 3)) !== 'WIN') {
         // OpenSSL slow on Win
         $bytes = openssl_random_pseudo_bytes($count);
     }
     if ($bytes === '' && @is_readable('/dev/urandom') && ($hRand = @fopen('/dev/urandom', 'rb')) !== FALSE) {
         $bytes = fread($hRand, $count);
         fclose($hRand);
     }
     if (strlen($bytes) < $count) {
         $bytes = '';
         if ($this->randomState === null) {
             $this->randomState = microtime();
             if (function_exists('getmypid')) {
                 $this->randomState .= getmypid();
             }
         }
         for ($i = 0; $i < $count; $i += 16) {
             $this->randomState = md5(microtime() . $this->randomState);
             if (PHP_VERSION >= '5') {
                 $bytes .= md5($this->randomState, true);
             } else {
                 $bytes .= pack('H*', md5($this->randomState));
             }
         }
         $bytes = substr($bytes, 0, $count);
     }
     return $bytes;
 }

 protected static function sendData($host, $POST, $HEAD, $filepath, $mediafile, $TAIL)
 {
     $sock = fsockopen("ssl://" . $host, 443);
     fwrite($sock, $POST);
     fwrite($sock, $HEAD);
     //write file data
     $buf = 1024;
     $totalread = 0;
     $fp = fopen($filepath, "r");
     while ($totalread < $mediafile['filesize']) {
         $buff = fread($fp, $buf);
         fwrite($sock, $buff, $buf);
         $totalread += $buf;
     }
     //echo $TAIL;
     fwrite($sock, $TAIL);
     sleep(1);
     $data = fgets($sock, 8192);
     $data .= fgets($sock, 8192);
     $data .= fgets($sock, 8192);
     $data .= fgets($sock, 8192);
     $data .= fgets($sock, 8192);
     $data .= fgets($sock, 8192);
     $data .= fgets($sock, 8192);
     fclose($sock);
     list($header, $body) = preg_split("/\\R\\R/", $data, 2);
     $json = json_decode($body);
     if (!is_null($json)) {
         return $json;
     }
     return false;
 }

 public static function isXliff($stringData = null, $fullPathToFile = null)
 {
     self::_reset();
     $info = array();
     if (!empty($stringData) && empty($fullPathToFile)) {
         $stringData = substr($stringData, 0, 1024);
     } elseif (empty($stringData) && !empty($fullPathToFile)) {
         $info = FilesStorage::pathinfo_fix($fullPathToFile);
         $file_pointer = fopen("{$fullPathToFile}", 'r');
         // Checking Requirements (By specs, I know that xliff version is in the first 1KB)
         $stringData = fread($file_pointer, 1024);
         fclose($file_pointer);
     } elseif (!empty($stringData) && !empty($fullPathToFile)) {
         //we want to check extension and content
         $info = FilesStorage::pathinfo_fix($fullPathToFile);
     }
     self::$fileType['info'] = $info;
     //we want to check extension also if file path is specified
     if (!empty($info) && !self::isXliffExtension()) {
         //THIS IS NOT an xliff
         return false;
     }
     //		preg_match( '|<xliff\s.*?version\s?=\s?["\'](.*?)["\'](.*?)>|si', $stringData, $tmp );
     if (!empty($stringData)) {
         return array($stringData);
     }
     return false;
 }

 protected function downFile($path, $file_name)
 {
     header("Content-type:text/html;charset=utf-8");
     // echo $path,$file_name;
     //中文兼容
     $file_name = iconv("utf-8", "gb2312", $file_name);
     //获取网站根目录，这里可以换成你的下载目录
     $file_sub_path = $path;
     $file_path = $file_sub_path . $file_name;
     //判断文件是否存在
     if (!file_exists($file_path)) {
         echo '文件不存在';
         return;
     }
     $fp = fopen($file_path, "r");
     $file_size = filesize($file_path);
     //下载文件所需的header申明
     Header("Content-type: application/octet-stream");
     Header("Accept-Ranges: bytes");
     Header("Accept-Length:" . $file_size);
     Header("Content-Disposition: attachment; filename=" . $file_name);
     $buffer = 1024;
     $file_count = 0;
     //返回数据到浏览器
     while (!feof($fp) && $file_count < $file_size) {
         $file_con = fread($fp, $buffer);
         $file_count += $buffer;
         echo $file_con;
     }
     fclose($fp);
 }

 public static function readRoutes($url, $params = array())
 {
     if (isset(self::$routes)) {
     } else {
         $filename = $_SERVER["DOCUMENT_ROOT"] . "/Init/routing.prop";
         $f = fopen($filename, "r");
         $r = fread($f, filesize($filename));
         $prop = explode("\n", $r);
         #print_r($prop);
         for ($i = 0; $i < count($prop); $i++) {
             if (substr($prop[$i], 0, 4) != "    ") {
                 continue;
             }
             $params = array();
             $row = true;
             while ($row) {
                 $row = self::readRoutingRow($prop[$i++]);
                 if ($row) {
                     $params[$row[0]] = $row[1];
                 }
             }
             $i--;
             if (self::checkMe($url, $params)) {
                 break;
             }
         }
     }
 }

function fsize($file)
{
    // filesize will only return the lower 32 bits of
    // the file's size! Make it unsigned.
    $fmod = filesize($file);
    if ($fmod < 0) {
        $fmod += 2.0 * (PHP_INT_MAX + 1);
    }
    // find the upper 32 bits
    $i = 0;
    $myfile = fopen($file, "r");
    // feof has undefined behaviour for big files.
    // after we hit the eof with fseek,
    // fread may not be able to detect the eof,
    // but it also can't read bytes, so use it as an
    // indicator.
    while (strlen(fread($myfile, 1)) === 1) {
        fseek($myfile, PHP_INT_MAX, SEEK_CUR);
        $i++;
    }
    fclose($myfile);
    // $i is a multiplier for PHP_INT_MAX byte blocks.
    // return to the last multiple of 4, as filesize has modulo of 4 GB (lower 32 bits)
    if ($i % 2 == 1) {
        $i--;
    }
    // add the lower 32 bit to our PHP_INT_MAX multiplier
    return (double) $i * (PHP_INT_MAX + 1) + $fmod;
}

function final_extract_install()
{
    global $CONFIG, $lang_plugin_final_extract, $lang_plugin_final_extract_config, $thisplugin;
    require 'plugins/final_extract/configuration.php';
    require 'include/sql_parse.php';
    if (!isset($CONFIG['fex_enable'])) {
        $query = "INSERT INTO " . $CONFIG['TABLE_CONFIG'] . " VALUES ('fex_enable', '1');";
        cpg_db_query($query);
        // create table
        $db_schema = $thisplugin->fullpath . '/schema.sql';
        $sql_query = fread(fopen($db_schema, 'r'), filesize($db_schema));
        $sql_query = preg_replace('/CPG_/', $CONFIG['TABLE_PREFIX'], $sql_query);
        $sql_query = remove_remarks($sql_query);
        $sql_query = split_sql_file($sql_query, ';');
        foreach ($sql_query as $q) {
            cpg_db_query($q);
        }
        // Put default setting
        $db_schema = $thisplugin->fullpath . '/basic.sql';
        $sql_query = fread(fopen($db_schema, 'r'), filesize($db_schema));
        $sql_query = preg_replace('/CPG_/', $CONFIG['TABLE_PREFIX'], $sql_query);
        $sql_query = remove_remarks($sql_query);
        $sql_query = split_sql_file($sql_query, ';');
        foreach ($sql_query as $q) {
            cpg_db_query($q);
        }
    }
    return true;
}

function mci_file_read_local($p_diskfile)
{
    $t_handle = fopen($p_diskfile, "r");
    $t_content = fread($t_handle, filesize($p_diskfile));
    fclose($t_handle);
    return $t_content;
}

 /**
  * Get the specified number of random bytes.
  *
  * Attempts to use a cryptographically secure (not predictable)
  * source of randomness if available. If there is no high-entropy
  * randomness source available, it will fail. As a last resort,
  * for non-critical systems, define
  * <code>Auth_OpenID_RAND_SOURCE</code> as <code>null</code>, and
  * the code will fall back on a pseudo-random number generator.
  *
  * @param int $num_bytes The length of the return value
  * @return string $bytes random bytes
  */
 function getBytes($num_bytes)
 {
     static $f = null;
     $bytes = '';
     if ($f === null) {
         if (Auth_OpenID_RAND_SOURCE === null) {
             $f = false;
         } else {
             $f = @fopen(Auth_OpenID_RAND_SOURCE, "r");
             if ($f === false) {
                 $msg = 'Define Auth_OpenID_RAND_SOURCE as null to ' . ' continue with an insecure random number generator.';
                 trigger_error($msg, E_USER_ERROR);
             }
         }
     }
     if ($f === false) {
         // pseudorandom used
         $bytes = '';
         for ($i = 0; $i < $num_bytes; $i += 4) {
             $bytes .= pack('L', mt_rand());
         }
         $bytes = substr($bytes, 0, $num_bytes);
     } else {
         $bytes = fread($f, $num_bytes);
     }
     return $bytes;
 }

 function downloadToString()
 {
     $crlf = "\r\n";
     // generate request
     $req = 'GET ' . $this->_uri . ' HTTP/1.0' . $crlf . 'Host: ' . $this->_host . $crlf . $crlf;
     // fetch
     $this->_fp = fsockopen(($this->_protocol == 'https' ? 'ssl://' : '') . $this->_host, $this->_port);
     fwrite($this->_fp, $req);
     while (is_resource($this->_fp) && $this->_fp && !feof($this->_fp)) {
         $response .= fread($this->_fp, 1024);
     }
     fclose($this->_fp);
     // split header and body
     $pos = strpos($response, $crlf . $crlf);
     if ($pos === false) {
         return $response;
     }
     $header = substr($response, 0, $pos);
     $body = substr($response, $pos + 2 * strlen($crlf));
     // parse headers
     $headers = array();
     $lines = explode($crlf, $header);
     foreach ($lines as $line) {
         if (($pos = strpos($line, ':')) !== false) {
             $headers[strtolower(trim(substr($line, 0, $pos)))] = trim(substr($line, $pos + 1));
         }
     }
     // redirection?
     if (isset($headers['location'])) {
         $http = new ilHttpRequest($headers['location']);
         return $http->DownloadToString($http);
     } else {
         return $body;
     }
 }

 /**
  * @test
  */
 public function canReadFromLargeFile()
 {
     $fp = fopen($this->largeFile->url(), 'rb');
     $data = fread($fp, 15);
     fclose($fp);
     $this->assertEquals(str_repeat(' ', 15), $data);
 }

 /**
     Upload a profile picture for the group 
 */
 function save_picture($ext)
 {
     global $cfg;
     if (!$this->user->logged_in() || !$this->user->group) {
         throw new Exception("Access denied!");
     }
     if (!isset($_SERVER["CONTENT_LENGTH"])) {
         throw new Exception("Invalid parameters");
     }
     $size = (int) $_SERVER["CONTENT_LENGTH"];
     $file_name = rand() . time() . "{$this->user->id}.{$ext}";
     $file_path = "{$cfg['dir']['content']}{$file_name}";
     // Write the new one
     $input = fopen("php://input", "rb");
     $output = fopen($file_path, "wb");
     if (!$input || !$output) {
         throw new Exception("Cannot open files!");
     }
     while ($size > 0) {
         $data = fread($input, $size > 1024 ? 1024 : $size);
         $size -= 1024;
         fwrite($output, $data);
     }
     fclose($input);
     fclose($output);
     // Update the profile image
     $this->group->update($this->user->group, array('picture' => $file_name));
 }

 /**
  * @return bool
  */
 public function analyze()
 {
     $info =& $this->getid3->info;
     fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
     $EXEheader = fread($this->getid3->fp, 28);
     $magic = 'MZ';
     if (substr($EXEheader, 0, 2) != $magic) {
         $info['error'][] = 'Expecting "' . Helper::PrintHexBytes($magic) . '" at offset ' . $info['avdataoffset'] . ', found "' . Helper::PrintHexBytes(substr($EXEheader, 0, 2)) . '"';
         return false;
     }
     $info['fileformat'] = 'exe';
     $info['exe']['mz']['magic'] = 'MZ';
     $info['exe']['mz']['raw']['last_page_size'] = Helper::LittleEndian2Int(substr($EXEheader, 2, 2));
     $info['exe']['mz']['raw']['page_count'] = Helper::LittleEndian2Int(substr($EXEheader, 4, 2));
     $info['exe']['mz']['raw']['relocation_count'] = Helper::LittleEndian2Int(substr($EXEheader, 6, 2));
     $info['exe']['mz']['raw']['header_paragraphs'] = Helper::LittleEndian2Int(substr($EXEheader, 8, 2));
     $info['exe']['mz']['raw']['min_memory_paragraphs'] = Helper::LittleEndian2Int(substr($EXEheader, 10, 2));
     $info['exe']['mz']['raw']['max_memory_paragraphs'] = Helper::LittleEndian2Int(substr($EXEheader, 12, 2));
     $info['exe']['mz']['raw']['initial_ss'] = Helper::LittleEndian2Int(substr($EXEheader, 14, 2));
     $info['exe']['mz']['raw']['initial_sp'] = Helper::LittleEndian2Int(substr($EXEheader, 16, 2));
     $info['exe']['mz']['raw']['checksum'] = Helper::LittleEndian2Int(substr($EXEheader, 18, 2));
     $info['exe']['mz']['raw']['cs_ip'] = Helper::LittleEndian2Int(substr($EXEheader, 20, 4));
     $info['exe']['mz']['raw']['relocation_table_offset'] = Helper::LittleEndian2Int(substr($EXEheader, 24, 2));
     $info['exe']['mz']['raw']['overlay_number'] = Helper::LittleEndian2Int(substr($EXEheader, 26, 2));
     $info['exe']['mz']['byte_size'] = ($info['exe']['mz']['raw']['page_count'] - 1) * 512 + $info['exe']['mz']['raw']['last_page_size'];
     $info['exe']['mz']['header_size'] = $info['exe']['mz']['raw']['header_paragraphs'] * 16;
     $info['exe']['mz']['memory_minimum'] = $info['exe']['mz']['raw']['min_memory_paragraphs'] * 16;
     $info['exe']['mz']['memory_recommended'] = $info['exe']['mz']['raw']['max_memory_paragraphs'] * 16;
     $info['error'][] = 'EXE parsing not enabled in this version of GetId3Core() [' . $this->getid3->version() . ']';
     return false;
 }

 public static function echoFileContent($filename)
 {
     $handle = fopen($filename, "r");
     $contents = fread($handle, filesize($filename));
     fclose($handle);
     echo $contents;
 }

function file_to_str($file, $size)
{
    $link = start_nchsls();
    $fd = fopen($file, 'r');
    $str = fread($fd, $size);
    return mysql_real_escape_string($str, $link);
}