mysq, php writes unicode characters

<span><span>一些特殊字符</span><span>(</span><span>图标字符</span><span>)</span><span>在保存</span><span>mysql</span><span>时</span><span>,</span><span>不能插入数据库
</span><span>可以先把字符</span><span>(</span><span>特殊字符和正常字符</span><span>)</span><span>用</span><span>base64_encode</span><span>转为</span><span>base64</span><span>编码</span><span>,</span><span>保存到</span><span>mysql
</span><span>取出还原时</span><span>,</span><span>用</span><span>base64_decode</span><span>进行</span><span>base64</span><span>解码</span><span>,</span><span>再用</span><span>json_decode</span><span>还原为原字符</span></span>

Compiled with reference to online information

/**
 * 一些特殊字符(图标字符)在保存mysql时,不能插入数据库
 * 可以先把字符(特殊字符和正常字符)用base64_encode转为base64编码,保存到mysql
 * 取出还原时,用base64_decode进行base64解码,再用json_decode还原为原字符
 */

/**
 * unicode解码
 * @param $str
 * @return mixed|string
 */
function unicode_decode($str)
{
    if (!$str)
        return $str;
    $decode = json_decode($str);
    if ($decode)
        return $decode;
    $str = '["' . $str . '"]';

    $decode = json_decode($str);
    if (count($decode) == 1) {
        return $decode[0];
    }
    return $str;
}

//$re = unicode_decode('\u963f\u55b5\ud83d\udc31\ud83d\udca6');
//echo($re);

/**
 * unicode编码
 * @param $str
 * @return string
 */
function unicode_encode($str)
{
    if (!$str)
        return $str;
    $decode = json_encode($str);
    if ($decode)
        return $decode;
    $str = '["' . $str . '"]';

    $decode = json_encode($str);
    if (count($decode) == 1) {
        return $decode[0];
    }
    return $str;
}

//$re1 = unicode_encode('阿喵');
//echo($re1);


///////////////////////////////////////////////////////////////


/**
 * 对unicode字符进行base64编码,保存入库
 */
$conn = @mysql_connect("localhost","root","111111");
if (!$conn){
    die("连接数据库失败：" . mysql_error());
}

mysql_select_db("wx_sys", $conn);
mysql_query("set character set 'gbk'");   //避免中文乱码字符转换
mysql_query("set character set 'utf8'");   // PHP 文件为 utf-8 格式时使用
//mysql_query("set names 'utf8'");	//PHP 文件为 utf-8 格式时使用

//unicode码字符
$name = '\u963f\u55b5\ud83d\udc31\ud83d\udca6';
//正常中文
//$name = '张三';
//base64编码
$re = base64_encode($name);

$sql = "insert into test (uni) values ('" . $re . "')";

if(!mysql_query($sql,$conn)){
    echo "添加数据失败：".mysql_error();
} else {
    echo "添加数据成功！";
}

/////////////////////
/**
 * 取出数据,base64解码,并还原字符
 */
$sql2 = "select * from test";
$result = mysql_query($sql2)
or die("无效查询: " . mysql_error());

//循环从数据集取出数据
while( $row = mysql_fetch_array($result) ){
    $sr = base64_decode($row['uni']);
    $ab = unicode_decode($sr);
    echo "uni:".$ab."<br />";
}

The above introduces how to write unicode characters in mysq and php, including the content. I hope it will be helpful to friends who are interested in PHP tutorials.