Problems with gzip encoding or compression?

Question

PHP

Faced such problem: I send request through curl post to which the answer comes.
Website: https://gr.investing.com/holiday-calendar/
You need to get calendar data in different languages.
Everything works fine if English is used, but does not work with other languages ​​(Greek, Russian, etc.).
The response from the server is:
{"data":"\n \t\n \t24.01.2017<\/td>\n <\/span>\u03a1\u03bf\u03c5\u03bc\u03b1\u03bd\u03af\u03b1<\/a>< \/td>\n \u03a7\u03c1\u03b7\u03bc\u03b1\u03c4\u03b9\u03c3\u03c4\u03ae\u03c1\u03b9\u03bf \u0392\u03bf\u03c5\u03ba\u03bf\u03c5\u03c1\u03c1 \u03c4\u03b9<\/td>\n \u0397\u03bc\u03ad\u03c1\u03b1 \u03c4\u03b7\u03c2 \u00a0\u0395\u03bd\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03c2\ u03c4\u03b7\u03c2 \u0392\u03bf\u03c5\u03bb\u03b3\u03b1\u03c1\u03af\u03b1\u03c2<\/td>\n <\/tr>\n \t\n \t25.01.2017<\/ td>\n <\/span>B\u03c1\u03b1\u03b6\u03b9\u03bb\u03af\u03b1<\/a><\/td>\n \u03a7\u03c1\u03b7\u03bc\u03b1\u03c4\u03b9 \u03c3\u03c4\u03ae\u03c1\u03b9\u03bf \u03a3\u03ac\u03bf \u03a0\u03ac\u03bf\u03bb\u03bf<\/td>\n \u0395\u03c0\u03ad\u03c4\u03b5\u03b9\u03bf\u03c2 \u03c4\u03b7\u03c2 \u03a0\u03cc\u03bb\u03b7\u03c2 \u03c4\u03bf\u03c5 \u03a3\u03\u03ac\a \u03bf\u03bb\u03bf<\/td>\n <\/tr>\n \t\n \t<\/td>\n <\/span>\u03a4\u03b1\u03ca\u03b2\u03ac\u03bd <\/a><\/td>\n \u03a7\u03c1\u03b7\u03bc\u03b1\u03c4\u03b9\u03c3\u03c4\u03ae\u03c1\u03b9\u03bf \u03a4\u03b1\u03ca\u03b2\u03ac\u03bd <\/td>\n \u0391\u03c1\u03b3\u03af\u03b1 \u03c3\u03c5\u03bd\u03b1\u03bb\u03bb\u03b1\u03b3\u03ce\u03bd<\/td>\n <\/tr>\ n \n ","noresult":0,"timeframe":"custom","dateFrom":"2017-01-24","dateTo":"2017-01-25","rows_num":3," last_time_scope":1485302400,"bind_scroll_handler":false}false}false}\/span>\u03a4\u03b1\u03ca\u03b2\u03ac\u03bd<\/a><\/td>\n \u03a7\u03c1\u03b7\u03bc\u03b1\u03c4\u03b9\u03c3\u03c4\u03ae\u03c1 \u03b9\u03bf \u03a4\u03b1\u03ca\u03b2\u03ac\u03bd<\/td>\n \u0391\u03c1\u03b3\u03af\u03b1 \u03c3\u03c5\u03bd\u03b1\u03bb\u03bb\u03b1\u03b3 u03ce\u03bd<\/td>\n <\/tr>\n \n ","noresult":0,"timeframe":"custom","dateFrom":"2017-01-24","dateTo" :"2017-01-25","rows_num":3,"last_time_scope":1485302400,"bind_scroll_handler":false}\/span>\u03a4\u03b1\u03ca\u03b2\u03ac\u03bd<\/a><\/td>\n \u03a7\u03c1\u03b7\u03bc\u03b1\u03c4\u03b9\u03c3\u03c4\u03ae\u03c1 \u03b9\u03bf \u03a4\u03b1\u03ca\u03b2\u03ac\u03bd<\/td>\n \u0391\u03c1\u03b3\u03af\u03b1 \u03c3\u03c5\u03bd\u03b1\u03bb\u03bb\u03b1\u03b3 u03ce\u03bd<\/td>\n <\/tr>\n \n ","noresult":0,"timeframe":"custom","dateFrom":"2017-01-24","dateTo" :"2017-01-25","rows_num":3,"last_time_scope":1485302400,"bind_scroll_handler":false}\n \u0391\u03c1\u03b3\u03af\u03b1 \u03c3\u03c5\u03bd\u03b1\u03bb\u03bb\u03b1\u03b3\u03ce\u03bd<\/td>\n <\/tr>\n \n ", "noresult":0,"timeframe":"custom","dateFrom":"2017-01-24","dateTo":"2017-01-25","rows_num":3,"last_time_scope":1485302400, "bind_scroll_handler":false}\n \u0391\u03c1\u03b3\u03af\u03b1 \u03c3\u03c5\u03bd\u03b1\u03bb\u03bb\u03b1\u03b3\u03ce\u03bd<\/td>\n <\/tr>\n \n ", "noresult":0,"timeframe":"custom","dateFrom":"2017-01-24","dateTo":"2017-01-25","rows_num":3,"last_time_scope":1485302400, "bind_scroll_handler":false}
Any ideas what is the problem here?

Answer 1

There are no problems here. This is the specifics of character encoding in json. Do json_decode() and see the data at least through var_dump(). See that everything is in order there.