PHP Decode

<?php
if(!extension_loaded('Php Express')){$__['os']=strtoupper(substr(PHP_OS,0,3));$__['ver']=strtoupper(substr(PHP_VERSION,0,3));$__['ext']=($__['os']=='WIN')?'.dll':'.so';$__['nam']='phpexpress-php-'.$__['ver'].$__['ext'];$__['edr']=realpath(ini_get('extension_dir'));$__['sdr']=getcwd();if($__['os']=='WIN'){$__['idr']=str_replace('\\','/',$__['edr']);$__['sdr']=str_replace('\\','/',$__['sdr']);if((strlen($__['idr'])>2)&&($__['idr'][1]==':'))$__['idr']=substr($__['idr'],2);if((strlen($__['sdr'])>2)&&($__['sdr'][1]==':'))$__['sdr']=substr($__['sdr'],2);}else{$__['idr']=$__['edr'];}$__['rd']=str_repeat('/..',substr_count($__['idr'],'/')).$__['sdr'].'/';$__['i']=strlen($__['rd']);while(true){$__['i']=strrpos($__['rd'],'/');if($__['i']!==false){$__['rd']=substr($__['rd'],0,$__['i']);$__['lp']=$__['rd'].'/phpexpress/'.$__['nam'];if(file_exists($__['edr'].$__['lp'])){$__['nam']=$__['lp'];break;}$__['lp']=$__['rd'].'/'.$__['nam'];if(file_exists($__['edr'].$__['lp'])){$__['nam']=$__['lp'];break;}}else	break;}@dl($__['nam']);if(function_exists('__pe_dl_init')){return __pe_dl_init();}else{echo('<h2>Error:</h2><br>file <i>'.__FILE__."</i> requires Php Express loader to be installed by the web site administrator.\n");exit(2);}}die('File '.__FILE__." is corrupted.\n");
?>