Chinese characters ending up blank in Database [duplicate] - php

Question

This question already has answers here:
UTF-8 all the way through
(13 answers)
Closed 3 years ago.
Im making an API for a company that inserts orders via this api into our DB, but I'm running into a problem:
Chinese characters don't get stored into my tables, how to fix this?
I have:
- My test file which uses cURL to post set to utf8 via header*
- The API code which inserts the data set to utf8 via header*
- Stored my phpfile as an UTF-8 encoded file
- mysqli connection set to utf8 ($connection->set_charset("utf8"))
- mysql-database set to utf8_general_ci
- mysql-table set to utf8_general_ci
- mysql-columns set to utf8_general_ci
- I insert the values into a VARCHAR and into a TEXT column (for test purposes)
- Inserted the values directly into the query -> no result
- Inserted the values via iconv("ISO-8859-1","UTF-8", $text)-> weird result
- Inserted the values via iconv("UTF-8","UTF-8", $text)-> no result
- Tested characters like áéíúó, which work perfectly fine
- Set my postvalues for curl via foreach($post as $k=>$v){ $data.= $k.'='.$v;} to send as data
- Set my postvalues for curl via http_build_query($post) to send as data
- Used a query before inserted doing SET CHARACTER SET utf8
- Used a query before inserted doing SET NAMES 'utf8'
When I echo the query before inserting it, I see the chinese characters
When I check the database, it's blank values
(not unexpected:) When I Select it and output it, it's blank
*PHP charset header:
header('Content-Type: text/html; charset=utf-8');
I'm out of ideas, anyone?

Answer 1

I have same problem and use this query and my problem solved
("SET CHARACTER SET utf8")
$mysqli->query("SET CHARACTER SET utf8")

Answer 2

Verify that the field has utf8_unicode_ci
CREATE TABLE `table` (
`id` int(15) NOT NULL,
`fieldname` varchar(20) NOT NULL,
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
and the charset is utf8
mysqli_set_charset($con,"utf8");

Answer 3

OOP
public function open_connection() {
$this->connection = mysqli_connect(DB_SERVER, DB_USER, DB_PASS, DB_NAME);
if(mysqli_connect_errno()) {
$msg = "Database connection failed: ";
$msg .= mysqli_connect_error();
$msg .= " (" . mysqli_connect_errno() . ")";
exit($msg);
}
// Change character set to utf8
mysqli_set_charset($this->connection,"utf8");
}