MYSQL 写入emoji表情字符处理

这个鬼emoji表情是4个字节，mysql使用的utf8编码，UTF8占3个字节，要存储那个emoji表情需要将mysql编码由UFT8改为UFT8的超集，utf8mb4;

改数据库编码容易引起大面的乱码灾难。所以当遇到emoji字符表情的时候做特殊处理。网上也有很多处理方案，最后找到了一个贴上地址和代码:https://github.com/BriquzStudio/php-emoji ,多谢

class Emoji
{
	/**
	 * Encode emoji in text
	 * @param string $text text to encode
	 */
	public static function Encode($text) {
		return self::convertEmoji($text,"ENCODE");
	}
	/**
	 * Decode emoji in text
	 * @param string $text text to decode
	 */
	public static function Decode($text) {
		return self::convertEmoji($text,"DECODE");
	}
	private static function convertEmoji($text,$op) {
		if($op=="ENCODE"){
			return preg_replace_callback('/([0-9|#][x{20E3}])|[x{00ae}|x{00a9}|x{203C}|x{2047}|x{2048}|x{2049}|x{3030}|x{303D}|x{2139}|x{2122}|x{3297}|x{3299}][x{FE00}-x{FEFF}]?|[x{2190}-x{21FF}][x{FE00}-x{FEFF}]?|[x{2300}-x{23FF}][x{FE00}-x{FEFF}]?|[x{2460}-x{24FF}][x{FE00}-x{FEFF}]?|[x{25A0}-x{25FF}][x{FE00}-x{FEFF}]?|[x{2600}-x{27BF}][x{FE00}-x{FEFF}]?|[x{2600}-x{27BF}][x{1F000}-x{1FEFF}]?|[x{2900}-x{297F}][x{FE00}-x{FEFF}]?|[x{2B00}-x{2BF0}][x{FE00}-x{FEFF}]?|[x{1F000}-x{1F9FF}][x{FE00}-x{FEFF}]?|[x{1F000}-x{1F9FF}][x{1F000}-x{1FEFF}]?/u',array('self',"encodeEmoji"),$text);
		}else{
			return preg_replace_callback('/(\u[0-9a-f]{4})+/',array('self',"decodeEmoji"),$text);
		}
	}
	private static function encodeEmoji($match) {
		return str_replace(array('[',']','"'),'',json_encode($match));
	}
	
	private static function decodeEmoji($text) {
		if(!$text) return '';
		$text = $text[0];
		$decode = json_decode($text,true);
		if($decode) return $decode;
		$text = '["' . $text . '"]';
		$decode = json_decode($text);
		if(count($decode) == 1){
		   return $decode[0];
		}
		return $text;
	}
}

　

$nickName = Emoji::Decode($userinfo['nickname']);

$realName = empty($nickName) ? '微信用户:' . time() : $nickName;