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<?php
/**
* File: Cache_File_Cleaner_Generic.php
*
* @package W3TC
*/
namespace W3TC;
/**
* Class Cache_File_Cleaner_Generic
*
* phpcs:disable PSR2.Methods.MethodDeclaration.Underscore
* phpcs:disable PSR2.Classes.PropertyDeclaration.Underscore
* phpcs:disable WordPress.PHP.NoSilencedErrors.Discouraged
*/
class Cache_File_Cleaner_Generic extends Cache_File_Cleaner {
/**
* Number of items processed
*
* @var integer
*/
private $processed_count = 0;
/**
* Cache expire time
*
* @var int
*/
private $_expire = 0;
/**
* Minimum valid time
*
* @var int
*/
private $time_min_valid = -1;
/**
* Old file minimum valid time
*
* @var int
*/
private $old_file_time_min_valid = -1;
/**
* PHP5-style constructor
*
* @param array $config Config.
*
* @return void
*/
public function __construct( $config = array() ) {
parent::__construct( $config );
$this->_expire = ( isset( $config['expire'] ) ? (int) $config['expire'] : 0 );
if ( ! $this->_expire ) {
$this->_expire = 0;
} elseif ( $this->_expire > W3TC_CACHE_FILE_EXPIRE_MAX ) {
$this->_expire = W3TC_CACHE_FILE_EXPIRE_MAX;
}
if ( ! empty( $config['time_min_valid'] ) ) {
$this->time_min_valid = $config['time_min_valid'];
$this->old_file_time_min_valid = $config['time_min_valid'];
} elseif ( $this->_expire > 0 ) {
$this->time_min_valid = time() - $this->_expire;
$this->old_file_time_min_valid = time() - $this->_expire * 5;
}
}
/**
* Clean
*
* @param string $path Path.
* @param bool $remove Remove flag.
*
* @return void
*/
public function _clean( $path, $remove = false ) {
$dir = false;
if ( is_dir( $path ) ) {
$dir = @opendir( $path );
}
if ( $dir ) {
while ( ( $entry = @readdir( $dir ) ) !== false ) { // phpcs:ignore WordPress.CodeAnalysis.AssignmentInCondition.FoundInWhileCondition
if ( '.' === $entry || '..' === $entry ) {
continue;
}
$full_path = $path . DIRECTORY_SEPARATOR . $entry;
foreach ( $this->_exclude as $mask ) {
if ( fnmatch( $mask, basename( $entry ) ) ) {
continue 2;
}
}
if ( @is_dir( $full_path ) ) {
$this->_clean( $full_path );
} else {
$this->_clean_file( $entry, $full_path );
}
}
@closedir( $dir );
if ( $this->is_empty_dir( $path ) ) {
@rmdir( $path );
}
}
}
/**
* Clean file
*
* @param string $entry Entry.
* @param string $full_path Full path.
*
* @return void
*/
public function _clean_file( $entry, $full_path ) {
if ( '_old' === substr( $entry, -4 ) ) {
if ( ! $this->is_old_file_valid( $full_path ) ) {
$this->processed_count++;
@unlink( $full_path );
}
} elseif ( ! $this->is_valid( $full_path ) ) {
$old_entry_path = $full_path . '_old';
$this->processed_count++;
if ( ! @rename( $full_path, $old_entry_path ) ) {
// if we can delete old entry - do second attempt to store in old-entry file.
if ( @unlink( $old_entry_path ) ) {
if ( ! @rename( $full_path, $old_entry_path ) ) {
// last attempt - just remove entry.
@unlink( $full_path );
}
}
}
}
}
/**
* Checks if file is valid
*
* @param string $file File.
*
* @return bool
*/
public function is_valid( $file ) {
if ( $this->time_min_valid > 0 && file_exists( $file ) ) {
$ftime = @filemtime( $file );
if ( $ftime && $ftime >= $this->time_min_valid ) {
return true;
}
}
return false;
}
/**
* Checks if old file is valid
*
* @param string $file File.
*
* @return bool
*/
public function is_old_file_valid( $file ) {
if ( $this->old_file_time_min_valid > 0 && file_exists( $file ) ) {
$ftime = @filemtime( $file );
if ( $ftime && $ftime >= $this->old_file_time_min_valid ) {
return true;
}
}
return false;
}
/**
* Checks if directory is empty
*
* @param string $dir Directory.
*
* @return bool
*/
public function is_empty_dir( $dir ) {
$files = @scandir( $dir );
return $files && count( $files ) <= 2;
}
}