微信emoji表情及输入法自带表情存储与显示

    //utf8mb4表情转换，用于存储
    function textEncode($text){
        $txtContent=json_encode($text);
        //\\\u[0-9a-f]{4}
        $txtContent=preg_replace_callback ('#(\\\u263a|\\\u2728|\\\u2b50|\\\u2753|\\\u270a|\\\u261d|\\\u2757|\\\ud[0-9a-f]{3}\\\ud[0-9a-f]{3})#',function($matches){ return  addslashes($matches[1]);}, $txtContent);
        $txtContent=json_decode($txtContent);

        return $txtContent;
    }

    //表情反转，用于显示
    function textDecode($text){
        $txtContent=json_encode($text);
        $txtContent=preg_replace_callback ('#(\\\u263a|\\\u2728|\\\u2b50|\\\u2753|\\\u270a|\\\u261d|\\\u2757|\\\ud[0-9a-f]{3})#',function($matches){ print_r($matches);return  stripslashes($matches[1]);}, $txtContent);
        $txtContent=json_decode($txtContent);

        return $txtContent;

    }
$table = '