<?php/** * 汉字转Unicode编码 * @param string $str 原始汉字的字符串 * @param string $encoding 原始汉字的编码 * @param boot $ishex 是否为十六进制表示（支持十六进制和十进制） * @param string $prefix 编码后的前缀 * @param string $postfix 编码后的后缀 */function unicode_encode($str, $encoding = &#39;UTF-8&#39;, $ishex = false, $prefix = &#39;&#&#39;, $postfix = &#39;;&#39;) {$str = iconv($encoding, &#39;UCS-2&#39;, $str);$arrstr = str_split($str, 2);$unistr = &#39;&#39;;for($i = 0, $len = count($arrstr); $i < $len; $i++) {$dec = $ishex ? bin2hex($arrstr[$i]) : hexdec(bin2hex($arrstr[$i]));$unistr .= $prefix . $dec . $postfix;}return $unistr;}/** * Unicode编码转汉字 * @param string $str Unicode编码的字符串 * @param string $decoding 原始汉字的编码 * @param boot $ishex 是否为十六进制表示（支持十六进制和十进制） * @param string $prefix 编码后的前缀 * @param string $postfix 编码后的后缀 */function unicode_decode($unistr, $encoding = &#39;UTF-8&#39;, $ishex = false, $prefix = &#39;&#&#39;, $postfix = &#39;;&#39;) {$arruni = explode($prefix, $unistr);$unistr = &#39;&#39;;for($i = 1, $len = count($arruni); $i < $len; $i++) {if (strlen($postfix) > 0) {$arruni[$i] = substr($arruni[$i], 0, strlen($arruni[$i]) - strlen($postfix));}$temp = $ishex ? hexdec($arruni[$i]) : intval($arruni[$i]);$unistr .= ($temp < 256) ? chr(0) . chr($temp) : chr($temp / 256) . chr($temp % 256);}return iconv(&#39;UCS-2&#39;, $encoding, $unistr);}header(&#39;Content-Type: text/html; charset=UTF-8&#39;);// UTF-8字符串测试$str = &#39;龕龖龗龘龙龚龛龜龝龞龟龠龡龢龣龤龥&#39;;var_dump($str);// 简单的$uni_str = mb_convert_encoding($str, &#39;HTML-ENTITIES&#39;, &#39;UTF-8&#39;);var_dump($uni_str);$str3 = mb_convert_encoding($uni_str, &#39;UTF-8&#39;, &#39;HTML-ENTITIES&#39;);var_dump($str3);$uni_str = unicode_encode($str);var_dump($uni_str); // 龕龖龗龘龙龚龛龜龝龞龟龠龡龢龣龤龥$str2 = unicode_decode($uni_str);var_dump($str2); // 龕龖龗龘龙龚龛龜龝龞龟龠龡龢龣龤龥$uni_str = unicode_encode($str, &#39;UTF-8&#39;, true, &#39;\u&#39;, &#39;&#39;);var_dump($uni_str); // \u9f95\u9f96\u9f97\u9f98\u9f99\u9f9a\u9f9b\u9f9c\u9f9d\u9f9e\u9f9f\u9fa0\u9fa1\u9fa2\u9fa3\u9fa4\u9fa5$str2 = unicode_decode($uni_str, &#39;UTF-8&#39;, true, &#39;\u&#39;, &#39;&#39;);var_dump($str2); // 龕龖龗龘龙龚龛龜龝龞龟龠龡龢龣龤龥// GBK字符串测试$str = &#39;PHP汉字转UNICODE&#39;;$str = iconv(&#39;UTF-8&#39;, &#39;GBK//IGNORE&#39;, $str);$uni_str = unicode_encode($str, &#39;GBK&#39;);var_dump($uni_str); // PHP汉字转UNICODE$str2 = unicode_decode($uni_str, &#39;GBK&#39;);$str2 = iconv(&#39;GBK&#39;, &#39;UTF-8&#39;, $str2);var_dump($str2); // PHP汉字转UNICODE$uni_str = unicode_encode($str, &#39;GBK&#39;, true, &#39;\u&#39;, &#39;&#39;);var_dump($uni_str); // \u0050\u0048\u0050\u6c49\u5b57\u8f6c\u0055\u004e\u0049\u0043\u004f\u0044\u0045$str2 = unicode_decode($uni_str, &#39;GBK&#39;, true, &#39;\u&#39;, &#39;&#39;);$str2 = iconv(&#39;GBK&#39;, &#39;UTF-8&#39;, $str2);var_dump($str2); // PHP汉字转UNICODE