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- <?php
- require_once 'exceptions/IOException.php';
- /**
- * Class FileUtils
- *
- * Utility class for file manipulation.
- */
- class FileUtils
- {
- /**
- * @var string
- */
- protected static $phpPrefix = '<?php /* ';
- /**
- * @var string
- */
- protected static $phpSuffix = ' */ ?>';
- /**
- * Write data into a file (Shaarli database format).
- * The data is stored in a PHP file, as a comment, in compressed base64 format.
- *
- * The file will be created if it doesn't exist.
- *
- * @param string $file File path.
- * @param mixed $content Content to write.
- *
- * @return int|bool Number of bytes written or false if it fails.
- *
- * @throws IOException The destination file can't be written.
- */
- public static function writeFlatDB($file, $content)
- {
- if (is_file($file) && !is_writeable($file)) {
- // The datastore exists but is not writeable
- throw new IOException($file);
- } else if (!is_file($file) && !is_writeable(dirname($file))) {
- // The datastore does not exist and its parent directory is not writeable
- throw new IOException(dirname($file));
- }
- return file_put_contents(
- $file,
- self::$phpPrefix.base64_encode(gzdeflate(serialize($content))).self::$phpSuffix
- );
- }
- /**
- * Read data from a file containing Shaarli database format content.
- *
- * If the file isn't readable or doesn't exist, default data will be returned.
- *
- * @param string $file File path.
- * @param mixed $default The default value to return if the file isn't readable.
- *
- * @return mixed The content unserialized, or default if the file isn't readable, or false if it fails.
- */
- public static function readFlatDB($file, $default = null)
- {
- // Note that gzinflate is faster than gzuncompress.
- // See: http://www.php.net/manual/en/function.gzdeflate.php#96439
- if (! is_readable($file)) {
- return $default;
- }
- $data = file_get_contents($file);
- if ($data == '') {
- return $default;
- }
- return unserialize(
- gzinflate(
- base64_decode(
- substr($data, strlen(self::$phpPrefix), -strlen(self::$phpSuffix))
- )
- )
- );
- }
- }
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