将问号（？）插入数据库[重复]

Question

可能重复：
iPhone emoticons insert into MySQL but become blank value
insert an Unicode character in databsae

我正在尝试在数据库中插入一个 Unicode 字符，例如：（????），但是当我在 textarea 中插入该（????）时，它会在数据库中添加一个问号（？）？

数据库：

CREATE TABLE `t1` (
  `id` int(4) NOT NULL auto_increment,
  `msg` varchar(500) NOT NULL,
  PRIMARY KEY  (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8_mb4 AUTO_INCREMENT=7 ;

insert.php添加数据：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>my page</title>
    </head>

    <body>
    <form id="form1" name="form1" method="post" action="insert-ok.php">
      <p>
        <label for="textarea"></label>
        <textarea name="textarea" id="textarea" cols="45" rows="5"></textarea>
      </p>
      <p>
        <input type="submit" name="button" id="button" value="Submit" />
      </p>
    </form>
    </body>

insert-ok.php 插入和查看数据：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>my data</title>
</head>

<body>
<?php 
$con = mysql_connect("localhost","root","4530");
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }
  mysql_query("set names 'utf8'"); 
mysql_select_db("test", $con); 
$post= $_POST['textarea'];
$sql = "insert into t1 values('$id','$post')";
mysql_query($sql,$con);

$result=mysql_query("select * from t1 ");

while($row = mysql_fetch_array($result))
{

    echo $row['msg'].'<br>';
}
?>
</body>
</html>

Answer 1

SET NAMES utf8mb4 COLLATE utf8mb4_unicode_ci

• 来源：http://mathiasbynens.be/notes/mysql-utf8mb4

另一件事是（如documentation says）已弃用mysql_ 不支持字符集。