Php Codeigniter中的JQuery自动完成编码

这适用于英语字符，但不适用于阿拉伯语。我为

$title

打印了带有“فف”的查询，我在其中发现了如下奇怪字符：

SELECT * FROM users WHERE agent_id = 1 AND type LIKE "owner" AND (firstName LIKE "%\%D9\%81\%D9\%81%" OR lastName LIKE "%\%D9\%81\%D9\%81%") 

这是我的密码： 控制器：

public function getResultExtend($title) {     
    $user_id = $this->session->userdata('id');        
    $result = $this->user->getOwners($user_id, $title);        
    foreach ($result as $user) {
      $user->userName = utf8_encode(stripslashes($user->userName));
    }
    echo json_encode($result);
}

视图：

型号：

function getOwners($user_id, $title) {
    header('Content-Type:text/html; charset=UTF-8');
    //$title = iconv(mb_detect_encoding($title, mb_detect_order(), true), "UTF-8", $title);
    $q = $this->db->query('SET NAMES utf8');
     $query = $this->db->query('SELECT * FROM users                     
                WHERE agent_id = ' . $user_id . ' AND type LIKE "owner" 
                AND (firstName LIKE "%'.$this->db->escape_like_str($title).'%"
                OR lastName LIKE "%'.$this->db->escape_like_str($title).'%")
                ');
    return $query->result();
}

我的表排序规则是utf8\u unicode\u ci，列也是utf-8。

---

那么，问题出在哪里？

检查应用程序/config/database.php中的行：

$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';

同时尝试添加.htaccess

AddDefaultCharset UTF-8

或者直接添加到index.php

header('Content-type: text/html; charset=utf-8' );

---

完成，但什么也没发生：（在PHPMyAdmin中尝试查询后，我发现它工作正常。

header('Content-type: text/html; charset=utf-8' );