Question

我正在使用codeigniter 运行以下查询后：

$names = this->db->query("SELECT AES_DECRYPT(nombre,'".$key."') AS nombre FROM places")

我从var_dump（$ names）

获得以下输出

[43]=>
array(1) {
  ["nombre"]=>
  string(41) "Industriales de Campeche"
}
[44]=>
array(1) {
  ["nombre"]=>
  string(67) "Evaristo Garc�a ESE"
}
[45]=>
array(1) {
  ["nombre"]=>
  string(39) "San Jose Popay�n"

phpmyadmin上的查询结果如下所示：

如您所见，包含特殊字符的字段以十六进制表示形式显示。当我使用这个工具http://www.rapidtables.com/convert/number/hex-to-ascii.htm我可以毫无问题地转换十六进制字段（显示特殊字符），但事情是我无法使它在codeigniter中工作。即使我使用utf-8编码，特殊字符仍然显示为。

值得一提的是，在加密数据库之前我没有遇到任何问题。

Answer 1

你需要做两件事

将表格和字段整理设置为＆＃34; utf8_general_ci＆＃34;

在HTML中设置元内容类型，如下所示

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>

Answer 2

Check your MySQL data column is using _unicode_ or utf8mb4_ character collations. Also check your table as a whole is using the same character set (in PHPMyAdmin look in <table> -> Operations -> Collation ).
Check that your MySQL connection is using UTF8mb4_ connection character set (see below).
Check that your HTML headers are set to UTF-8 (the headers, not the <head> section of the page, although that can't hurt to set to UTF-8 too.).

I'm pretty sure your issue comes that your connection to your database from your PHP (or whatever) is not the required full UTF-8 character set.

 // In your database connection class. 
 // Once initial contact has been established
 $this->dbObject->set_charset("utf8mb4");

Some further reading: UTF-8 all the way through

无法显示从AES_DECRYPT检索到的特殊字符

2 个答案: