PHP PMA_gzencodeNeeded函数代码示例

/**
 * Compress the export buffer
 *
 * @param string $dump_buffer the current dump buffer
 * @param string $compression the compression mode
 * @param string $filename    the filename
 *
 * @return object $message a message object (or empty string)
 */
function PMA_compressExport($dump_buffer, $compression, $filename)
{
    if ($compression == 'zip' && @function_exists('gzcompress')) {
        $zipfile = new ZipFile();
        $zipfile->addFile($dump_buffer, substr($filename, 0, -4));
        $dump_buffer = $zipfile->file();
    } elseif ($compression == 'gzip' && PMA_gzencodeNeeded()) {
        // without the optional parameter level because it bugs
        $dump_buffer = gzencode($dump_buffer);
    }
    return $dump_buffer;
}

/**
 * Compress the export buffer
 *
 * @param string $dump_buffer the current dump buffer
 * @param string $compression the compression mode
 * @param string $filename    the filename
 *
 * @return object $message a message object (or empty string)
 */
function PMA_compressExport($dump_buffer, $compression, $filename)
{
    if ($compression == 'zip' && @function_exists('gzcompress')) {
        $filename = substr($filename, 0, -4);
        // remove extension (.zip)
        $zipfile = new ZipFile();
        if (is_array($dump_buffer)) {
            foreach ($dump_buffer as $table => $dump) {
                $ext_pos = strpos($filename, '.');
                $extension = substr($filename, $ext_pos);
                $zipfile->addFile($dump, str_replace($extension, '_' . $table . $extension, $filename));
            }
        } else {
            $zipfile->addFile($dump_buffer, $filename);
        }
        $dump_buffer = $zipfile->file();
    } elseif ($compression == 'gzip' && PMA_gzencodeNeeded()) {
        // without the optional parameter level because it bugs
        $dump_buffer = gzencode($dump_buffer);
    }
    return $dump_buffer;
}

/**
 * Output handler for all exports, if needed buffering, it stores data into
 * $dump_buffer, otherwise it prints thems out.
 *
 * @param string $line the insert statement
 *
 * @return bool Whether output succeeded
 */
function PMA_exportOutputHandler($line)
{
    global $time_start, $dump_buffer, $dump_buffer_len, $save_filename;
    // Kanji encoding convert feature
    if ($GLOBALS['output_kanji_conversion']) {
        $line = PMA_kanji_str_conv($line, $GLOBALS['knjenc'], isset($GLOBALS['xkana']) ? $GLOBALS['xkana'] : '');
    }
    // If we have to buffer data, we will perform everything at once at the end
    if ($GLOBALS['buffer_needed']) {
        $dump_buffer .= $line;
        if ($GLOBALS['onfly_compression']) {
            $dump_buffer_len += strlen($line);
            if ($dump_buffer_len > $GLOBALS['memory_limit']) {
                if ($GLOBALS['output_charset_conversion']) {
                    $dump_buffer = PMA_convert_string('utf-8', $GLOBALS['charset_of_file'], $dump_buffer);
                }
                // as bzipped
                if ($GLOBALS['compression'] == 'bzip2' && @function_exists('bzcompress')) {
                    $dump_buffer = bzcompress($dump_buffer);
                } elseif ($GLOBALS['compression'] == 'gzip' && PMA_gzencodeNeeded()) {
                    // as a gzipped file
                    // without the optional parameter level because it bugs
                    $dump_buffer = gzencode($dump_buffer);
                }
                if ($GLOBALS['save_on_server']) {
                    $write_result = @fwrite($GLOBALS['file_handle'], $dump_buffer);
                    if (!$write_result || $write_result != strlen($dump_buffer)) {
                        $GLOBALS['message'] = PMA_Message::error(__('Insufficient space to save the file %s.'));
                        $GLOBALS['message']->addParam($save_filename);
                        return false;
                    }
                } else {
                    echo $dump_buffer;
                }
                $dump_buffer = '';
                $dump_buffer_len = 0;
            }
        } else {
            $time_now = time();
            if ($time_start >= $time_now + 30) {
                $time_start = $time_now;
                header('X-pmaPing: Pong');
            }
            // end if
        }
    } else {
        if ($GLOBALS['asfile']) {
            if ($GLOBALS['output_charset_conversion']) {
                $line = PMA_convert_string('utf-8', $GLOBALS['charset_of_file'], $line);
            }
            if ($GLOBALS['save_on_server'] && strlen($line) > 0) {
                $write_result = @fwrite($GLOBALS['file_handle'], $line);
                if (!$write_result || $write_result != strlen($line)) {
                    $GLOBALS['message'] = PMA_Message::error(__('Insufficient space to save the file %s.'));
                    $GLOBALS['message']->addParam($save_filename);
                    return false;
                }
                $time_now = time();
                if ($time_start >= $time_now + 30) {
                    $time_start = $time_now;
                    header('X-pmaPing: Pong');
                }
                // end if
            } else {
                // We export as file - output normally
                echo $line;
            }
        } else {
            // We export as html - replace special chars
            echo htmlspecialchars($line);
        }
    }
    return true;
}