好玩的聊天内容转emoji表情加解密算法

php算法代码，emoji表情换成自己喜欢的就行

• post请求
• api源码

<?php

// 可以封装成以下的API代码，接受GET请求，参数包括：

// action：指定API动作，encode表示加密，decode表示解密；

// content：需要加密或解密的字符串，使用urlencode编码；
 $miyu = ['表情1','表情2','表情3','表情4','表情5','表情6','表情7','表情8','表情9','表情10'];
function encode($str, $miyu)
{
    $code = null;
    $hexArray = str_split_unicode(bin2hex($str));
    foreach ($hexArray as $k => $v) {
        $x = base_convert($v, 16, 10) + $k % 16;
        if ($x >= 16) {
            $x -= 16;
        }
        $code .= $miyu[($x / 10)] . $miyu[$x % 10];
    }
    return $code;
}

function decode($str, $miyu)
{
    $code = null;
    $hexArray = str_split_unicode($str);
    $n = count($hexArray);
    for ($i = 0; $i < $n; $i++) {
        if ($i % 2 == 0) {
            if (empty($hexArray[$i + 1])) {
                break;
            }
            $A = array_search($hexArray[$i], $miyu);
            $B = array_search($hexArray[$i + 1], $miyu);
            $x = (($A * 10) + $B) - (($i / 2) % 16);
            if ($x < 0) {
                $x += 16;
            }
            $code .= dechex($x);
        }
    }
    return pack("H*", $code);
}

function str_split_unicode($str, $l = 0)
{
    if ($l > 0) {
        $ret = array();
        $len = mb_strlen($str, "UTF-8");
        for ($i = 0; $i < $len; $i += $l) {
            $ret[] = mb_substr($str, $i, $l, "UTF-8");
        }
        return $ret;
    }
    return preg_split("//u", $str, -1, PREG_SPLIT_NO_EMPTY);
}

function daddslashes($string, $force = 0, $strip = FALSE)
{
    !defined('MAGIC_QUOTES_GPC') && define('MAGIC_QUOTES_GPC', get_magic_quotes_gpc());
    if (!MAGIC_QUOTES_GPC || $force) {
        if (is_array($string)) {
            foreach ($string as $key => $val) {
                $string[$key] = daddslashes($val, $force, $strip);
            }
        } else {
            $string = addslashes($strip ? stripslashes($string) : $string);
        }
    }
    return $string;
}

if (isset($_POST['action']) && isset($_POST['content'])) {
    $action = daddslashes($_POST['action']);
    $content = daddslashes($_POST['content']);
    if ($action == 'encode') {
        $result = encode($content, $miyu);
        echo json_encode(array('error' => 200, 'data' => $result, 'message' => '加密成功'), JSON_UNESCAPED_UNICODE);
    } else if ($action == 'decode') {
        $result = decode($content, $miyu);
        echo json_encode(array('error' => 200, 'data' => $result, 'message' => '解密成功'), JSON_UNESCAPED_UNICODE);
    } else {
        echo 'Invalid action';
    }
} else {
    echo 'Invalid parameters';
}

?>