如何在 mysql codeigniter php 中使用 select 计算匹配的关键字？

Question

如何在mysql codeigniter php中使用select统计匹配关键字？这是我的 table

例如。假设搜索关键词是，test

messages table

id | title     | msg               |date
---+-----------+-------------------+-------------+--      
1  |  test1    |  yes              | 2016-06-01 // 2 match keywords
2  |  yes1     |  no               | 2016-06-02 // 1 match keywords   
3  |  test2    |  no               | 2016-06-03 // 1 match keywords
4  |  yes2     |  yes yes yes      | 2016-06-04 // 4 match keywords
5  |  yesyes3  |  yes yes yes yes  | 2016-06-05 // 6 match keywords

现在需要用 count_match 列显示它

id | title     | msg               |date        |count_match    
---+-----------+-------------------+------------+-------------------    
1  |  test1    |  yes              | 2016-06-01 | 2
2  |  yes1     |  no               | 2016-06-02 | 1  
3  |  test2    |  no               | 2016-06-03 | 1
4  |  yes2     |  yes yes yes      | 2016-06-04 | 4
5  |  yesyes3  |  yes yes yes yes  | 2016-06-05 | 6

对于数组，它应该显示如下

array (
    [0] => array (
        [id] => 5
        [title] => yesyes3
        [msg] => yes yes yes yes
        [date] => 2016-06-05
        [match] => 6
    )
    [1] => array (
        [id] => 4
        [title] => yes2
        [msg] => yes yes yes
        [date] => 2016-06-04
        [match] => 4
    )
    [2] => array (
        [id] => 1
        [title] => test1
        [msg] => yes
        [date] => 2016-06-01
        [match] => 2
    )
    [3] => array (
        [id] => 3
        [title] => test2
        [msg] => no
        [date] => 2016-06-03
        [match] => 1
    )
    [4] => array (
        [id] => 2
        [title] => yes1
        [msg] => no
        [date] => 2016-06-02
        [match] => 1
    )
)

目前我为此获取的代码是这样的

        $match = array('test','yes');
        $orderbyString1 = "";
        $orderbyString = "";
        $likestr = "";
        foreach($match AS $value)
        {
            $orderbyString .= "IF(m.title LIKE '%".$value."%' OR m.msg LIKE '%".$value."%',1,0)+";
            $likestr .= "m.title LIKE '%".$value."%' OR m.msg LIKE '%".$value."%' OR ";
        }
        $orderbyString = substr($orderbyString, 0, -1);
        $likestr = substr($likestr, 0, -4);
        $this->db->select('m.*, ('.$orderbyString.') as count_match');
        $this->db->from('messages m');
        $this->db->where($likestr." ORDER BY ".$orderbyString." DESC");

        $query = $this->db->get();

        $results = $query->result_array();
        print_r($results);exit;

有什么方法可以让 select 使用 php codeigniter 代码显示正确的 count_match 吗？因为目前它在 count_match.

下显示 1 和 2

谢谢！

Answer 1

在 php 方面，有很多选项可以计算数组中的关键字。如果您需要其他功能，例如无大小写匹配或 word boundaries how about using regex.

一个想法preg_match_all

Returns the number of full pattern matches (which might be zero), or FALSE if an error occurred.

$pattern = '~(?:yes|test)~i';

foreach($arr AS $k => $v)
  $arr[$k]['match'] = preg_match_all($pattern, $v['title']." ".$v['msg']);

模式只是一个 alternation of the two keywords using a non-capturing group. After the closing pattern delimiter ~ used the i flag for caseless matching. Regex101 是测试模式的好地方。

Here is a demo at eval.in

如果输入是通用的，请使用 preg_quote 从其特殊的正则表达式含义中转义某些字符。

如何在 mysql codeigniter php 中使用 select 计算匹配的关键字？

how to count the matched keywords using select in mysql codeigniter php?

php

mysql

arrays

select

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