PHP中对汉字进行UNICODE编码和解码的实现

UNICODE编码在PHP中使用UCS-2编码，之前还真是没有发现，一直还以为是UTF-8就行了。贴出代码：

//将内容进行UNICODE编码，编码后的内容格式：YOKA/u738b （原始：YOKA王）function unicode_encode($name){ $name = iconv('UTF-8', 'UCS-2', $name); $len = strlen($name); $str = ''; for ($i = 0; $i < $len - 1; $i = $i + 2) { $c = $name[$i]; $c2 = $name[$i + 1]; if (ord($c) > 0) { // 两个字节的文字 $str .= '/u'.base_convert(ord($c), 10, 16).base_convert(ord($c2), 10, 16); } else { $str .= $c2; } } return $str;}

// 将UNICODE编码后的内容进行解码，编码后的内容格式：YOKA/u738b （原始：YOKA王）function unicode_decode($name){ // 转换编码，将Unicode编码转换成可以浏览的utf-8编码 $pattern = '/([/w]+)|(///u([/w]{4}))/i'; preg_match_all($pattern, $name, $matches); if (!empty($matches)) { $name = ''; for ($j = 0; $j < count($matches[0]); $j++) { $str = $matches[0][$j]; if (strpos($str, '//u') === 0) { $code = base_convert(substr($str, 2, 2), 16, 10); $code2 = base_convert(substr($str, 4), 16, 10); $c = chr($code).chr($code2); $c = iconv('UCS-2', 'UTF-8', $c); $name .= $c; } else { $name .= $str; } } } return $name;}
测试用例：

echo '<h3>YOKA/u738b -> '.unicode_decode('YOKA/u738b').'</h3>';
$name = 'YOKA王';
echo '<h3>'.unicode_encode($name).'</h3>';