Last time I shared differences in comparative text, this time I made a comparison of folder changes-PHP source code

The last time I shared the differences between the comparative text, this time I will compare the changes in the folder. this class can compare the files in the two directories and find the changes.
It traverses the list of files retrieved from two directories.
This class can list which files are added, deleted, or modified.

 source = $source;}public function set_update($update) {$this->update = $update;}public function get_source() {return $this->source;}public function get_update() {return $this->update;}public function get_removed() {return $this->removed;}public function get_added() {return $this->added;}public function get_changed() {return $this->changed;}public function do_compare(){ $source = Array(); $destination = Array(); $currentDirectory = getcwd(); $workingDir = '';chdir($this->source); $source = $this->doTree('.', $source); if (!is_array($source)) return; chdir ($this->update); $destination = $this->doTree('.', $destination); if (!is_array($destination)) exit;chdir($currentDirectory); foreach ($source as $dir => $value) { foreach($value as $file => $hash) { if (isset($destination[$dir][$file])) { if ($hash != $destination[$dir][$file]) { $this->changed[] = $dir.'/'.$file;} } else { $this->removed[] = $dir.'/'.$file;}}} foreach ($destination as $dir => $value) { foreach($value as $file => $hash) { if (!isset($source[$dir][$file])) { $this->added[] = $dir.'/'.$file;}}}}private function checksum($file) { $ignores = Array(10, 13); $fh = fopen($file, 'r'); $buffer = ''; while (!feof($fh)) { $buffer .= fgets($fh);} fclose ($fh); foreach ($ignores as $ignore) { while (strpos($buffer, chr($ignore))) { $buffer = str_replace(chr($ignore), '', $buffer);}} return hash('crc32', $buffer).hash('crc32b', $buffer);}private function doTree($dir, &$array) { if (stripos($dir, 'checksum') !== false || stripos($dir, 'cache') !== false || stripos($dir, 'import') !== false || stripos($dir, 'custom') !== false || stripos($dir, '_notes') !== false || stripos($dir, '.svn') !== false) { return $array;} $filetypes = Array('php', 'js', 'htm', 'html', 'css', 'tpl', 'ini', 'txt'); if ($dh = opendir($dir)) { while ($file = readdir($dh)) { if ($file != '.' && $file != '..') { if (is_dir($dir.'/'.$file)) { if (count($array) == 0) $array[0] = 'Temp'; if (!$this->doTree($dir.'/'.$file, $array)) { return false;} } else { if (filesize($dir.'/'.$file)) { foreach ($filetypes as $type) { if (strpos($file.'|', '.'.$type.'|') != 0 ) {set_time_limit(30); $array[$dir][$file] = $this->checksum( $dir.'/'.$file ); //md5_file($dir.'/'.$file, false);}}}}}} if (count($array) > 1 && isset($array['0'])) unset($array['0']); return $array; } else { echo 'error opening '.$dir.''; return false;}}}

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 set_source($dir.'Source');// Directory where Source files are $cmp->set_update($dir.'Update');// Directory where pristeen files are $cmp->do_compare();// Do the compare $removed = $cmp->get_removed();// Get the results $added = $cmp->get_added();// ... $changed = $cmp->get_changed();// ... echo 'Files Changed';// Display the results foreach($changed as $file) { echo $file.' has been changed
';} echo 'Files Added'; foreach ($added as $add) { echo $add.'
';} echo 'Files Removed'; foreach ($removed as $remove) { echo $remove.'
';}?>