<?php
$hexString = "e8af9a";
$hexArray = str_split($hexString, 2); // 将十六进制编码分割为每两个字符一组

$unicode = ""; // 初始化Unicode字符串

foreach ($hexArray as $hex) {
    $unicode .= chr(hexdec($hex)); // 将十六进制转换为Unicode编码，并拼接到Unicode字符串中
}

$chineseString = mb_convert_encoding($unicode, 'UTF-8', 'UCS-2BE'); // 将Unicode编码转换为中文字符串

echo $chineseString; // 输出中文字符串
?>