How PHP determines emoji

iOS input emoji MySQL storage not (online can not change utf8mb4), how to determine the input character contains emoji, and then prompt

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iOS input emoji MySQL storage not (online can not change utf8mb4), how to determine the input character contains emoji, and then prompt

Do not determine whether it is emoji, the transmission of the Json_encode encrypted after the database, and then take out the time with Json_decode to show it, Json_decode can also urlencode a bit before, Take out the time to urldecode a bit;

Before storing the database

$message = json_encode($message);

After removal

$message = json_decode($message)

Code

$regex = '/([0-9|#][\x{20E3}])|[\x{00ae}|\x{00a9}|\x{203C}|\x{2047}|\x{2048}|\x{2049}|\x{3030}|\x{303D}|\x{2139}|\x{2122}|\x{3297}|\x{3299}][\x{FE00}-\x{FEFF}]?|[\x{2190}-\x{21FF}][\x{FE00}-\x{FEFF}]?|[\x{2300}-\x{23FF}][\x{FE00}-\x{FEFF}]?|[\x{2460}-\x{24FF}][\x{FE00}-\x{FEFF}]?|[\x{25A0}-\x{25FF}][\x{FE00}-\x{FEFF}]?|[\x{2600}-\x{27BF}][\x{FE00}-\x{FEFF}]?|[\x{2900}-\x{297F}][\x{FE00}-\x{FEFF}]?|[\x{2B00}-\x{2BF0}][\x{FE00}-\x{FEFF}]?|[\x{1F000}-\x{1F6FF}][\x{FE00}-\x{FEFF}]?/u';var_dump(preg_match($regex, '?'));var_dump(preg_match($regex, '?'));var_dump(preg_match($regex, '?'));var_dump(preg_match($regex, '测试'));var_dump(preg_match($regex, 'hello, world'));var_dump(preg_match($regex, 'testing'));var_dump(preg_match($regex, '中文 English'));

Result

int(1)int(1)int(1)int(0)int(0)int(0)int(0)

The expression is found, and you can look at the range of emoji in the UTF8 's Code table (or go UTF8 from the Unicode Code table range)

But suggest or change utf8mb4, this kind of migration basically is painless, full test can

The fundamental solution is that the database supports emoji

Are you sure you don't put emoji in the database, but you detect and then prompt?

Detection

//返回true就表示有emojifunction testEmoji($str){    $text = json_encode($str); //暴露出unicode    return preg_match("/(\\\u[ed][0-9a-f]{3})/i",$text);}

Escaping and depositing into the database

Look at my old problems, http://segmentfault.com/q/1010000003711491.

