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