Handling emoji Expressions (Unicode)

Handling emoji Expressions (Unicode)

Available for Android and IOS

/**
 * @brief kill emoji
 * @autho chenjinya@baidu.com
 * @param {string} $strText
 * @return {string} Removeemoji
 **/
static function Escapeemoji ($strText, $bool = False) {
    $preg =  '/\\\ud ([8-9a-f][ 0-9A-Z]{2})/I ';
    if ($bool = = True) {
        $boolPregRes = (Preg_match ($preg, Json_encode ($strText, True));
        return $boolPregRes;
    } else {
        $strPregRes = (preg_replace ($preg, ', Json_encode ($strText, True));
        $strRet = Json_decode ($strPregRes, true);
        return $strRet;
    }
 

Principle:

PHP is not able to parse the Unicode character after D800
The general emoji is between D800 and D8ff (Chinese is: 4E00-9FBF)

Write like this

$preg = '/[\x{d800}-\x{d8ff}]+/iu '; 

is invalid.

So it can only be converted to Unicode through Json_encode, and then the Unicode character is processed by regular, and then the normal string is reversed.