php transfer wechat emoticon emoji

Emoji transcoding

/**
转义emoji
 */
function userTextEncode($str){
    
    
    if(! is_string($str)) return $str;
    if(!$str || $str=="undefined")return "";
    $text = json_encode($str); //暴露出unicode
    $text = preg_replace_callback("/(\\\u[ed][0-9a-f]{3})/i",function($str){
    
    
        return addslashes($str[0]);
    },$text); //将emoji的unicode留下，其他不动，这里的正则比原答案增加了d，因为我发现我很多emoji实际上是\ud开头的，反而暂时没发现有\ue开头。

    return json_decode($text);

}
 

Emoticon decoding

/**
解码上面的转义
 */

function userTextDecode($str)
{
    
    
    $text = json_encode($str); //暴露出unicode
    $text = preg_replace_callback('/\\\\\\\\/i', function ($str) {
    
    
        return '\\';
    }, $text); //将两条斜杠变成一条，其他不动
    return json_decode($text);
}
 

The emoji emoticon dumped during storage has '\', which is filtered out

Use addslashes to escape

 $nick= addslashes(self::userTextEncode($userInfo['nick']));