假设我有这样的功能：

 public function get_list($category = '', $limit = 10, $offset = 0) {
        if (!empty($category))
            $this->db->where('category', $category);
        $search = $this->input->get('search');
        if (!empty($search))
            $this->db->or_like(array('foo_column'=>$search));
        $query = $this->db->get('table_name', $limit, $offset);
        //echo $this->db->last_query();
        return $query->result();
 }

产生查询为：

SELECT * FROM table_name WHERE foo_column LIKE '%match something%'

如您所见,％通配符可以在前后添加.

以及如果我想产生像：

... WHERE foo_column LIKE '%match%something%'?

仅供参考,我使用str_replace()函数将空间更改为％,但codeigniter始终使用斜杠对其进行转义.
它产生如下查询：

... WHERE foo_column LIKE '%match\%something%'

当搜索匹配另一个匹配项和关键字匹配匹配项,并且在第一个和/或之后的通配符似乎不起作用时,这很有用.

解决方法:

为了实现这种功能,我使用了一些不同的条件来更新您的代码.

Note: Here I’ve manually placed values of categories and search

public function get_list($category = '', $limit = 10, $offset = 0) {
    $category = 'electronics';
    if (!empty($category)) {
        $this->db->where('category', $category);
    }
    $search = 'match something';
    if (preg_match('/\s/', $search) > 0) {
        $search = array_map('trim', array_filter(explode(' ', $search)));
        foreach ($search as $key => $value) {
            $this->db->or_like('foo_column', $value);
        }
    } else if ($search != ''){
        $this->db->like('foo_column', $search);
    }
    $query = $this->db->get('table_name', $limit, $offset);
    return $query->result();
}

在这里$search =’match something’,这将生成查询,如下所示：

SELECT * FROM (`table_name`) WHERE `category` = 'electronics' AND  
`foo_column` LIKE '%match%' OR `foo_column` LIKE '%something%' LIMIT 10

如果$search =’匹配其他东西’,它将生成查询为

SELECT * FROM (`table_name`) WHERE `category` = 'electronics' AND 
`foo_column` LIKE '%match%' OR `foo_column` LIKE '%something%' OR 
`foo_column` LIKE '%another%' LIMIT 10

并且如果$search =’match’它将生成查询为

SELECT * FROM (`table_name`) WHERE `category` = 'electronics' AND 
`foo_column` LIKE '%match%' LIMIT 10

并且如果$search =”它将生成查询为

SELECT * FROM (`table_name`) WHERE `category` = 'electronics' LIMIT 10