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