/**
* Read a key from the cache
*
* @param string $key Identifier for the data
* @return mixed The cached data, or false if the data doesn't exist, has expired, or if there was an error fetching it
*/
public function read($key)
{
if (!$this->_init || $this->_setKey($key) === false) {
return false;
}
if ($this->settings['lock']) {
$this->_File->flock(LOCK_SH);
}
$this->_File->rewind();
$time = time();
$cachetime = intval($this->_File->current());
if ($cachetime !== false && ($cachetime < $time || $time + $this->settings['duration'] < $cachetime)) {
if ($this->settings['lock']) {
$this->_File->flock(LOCK_UN);
}
return false;
}
$data = '';
$this->_File->next();
while ($this->_File->valid()) {
$data .= $this->_File->current();
$this->_File->next();
}
if ($this->settings['lock']) {
$this->_File->flock(LOCK_UN);
}
$data = trim($data);
if ($data !== '' && !empty($this->settings['serialize'])) {
if ($this->settings['isWindows']) {
$data = str_replace('\\\\\\\\', '\\', $data);
}
$data = unserialize((string) $data);
}
return $data;
}
/**
* Delete all values from the cache
*
* @param boolean $check Optional - only delete expired cache items
* @return boolean True if the cache was successfully cleared, false otherwise
*/
public function clear($check) {
if (!$this->_init) {
return false;
}
$dir = dir($this->settings['path']);
if ($check) {
$now = time();
$threshold = $now - $this->settings['duration'];
}
$prefixLength = strlen($this->settings['prefix']);
while (($entry = $dir->read()) !== false) {
if (substr($entry, 0, $prefixLength) !== $this->settings['prefix']) {
continue;
}
if ($this->_setKey($entry) === false) {
continue;
}
if ($check) {
$mtime = $this->_File->getMTime();
if ($mtime > $threshold) {
continue;
}
$expires = (int)$this->_File->current();
if ($expires > $now) {
continue;
}
}
$path = $this->_File->getRealPath();
$this->_File = null;
if (file_exists($path)) {
unlink($path);
}
}
$dir->close();
return true;
}
/**
* @covers spriebsch\PHPca\File::seekTokenId
* @covers spriebsch\PHPca\File::add
*/
public function testSeekTokenId()
{
$file = new File('filename', 'sourcecode');
$file->add(new Token(T_OPEN_TAG, '<?php'));
$file->add(new Token(T_FUNCTION, 'function'));
$file->add(new Token(T_CLASS, 'class'));
$file->add(new Token(T_CLOSE_TAG, '?>'));
$file->rewind();
$file->seekTokenId(T_CLASS);
$this->assertEquals('T_CLASS', $file->current()->getName());
}
