How to perform fuzzy query in thinkphp

In the process of WEB development, data query is a very important operation, and fuzzy query is one of the more commonly used ones. ThinkPHP is a very popular PHP development framework. It provides a convenient and fast fuzzy query method. Here I will share how to perform fuzzy query in ThinkPHP.

First of all, in ThinkPHP, we can operate the database through the Db class. Specifically, we can specify which data table to use through the table method of the Db class, and then call the corresponding query method. When performing fuzzy queries, we can use the like method. The first parameter of this method is the field name that needs to be fuzzy matched, and the second parameter is the string that needs to be matched. For example, if we want to query all users whose names contain "Zhang", we can write the code like this:

Db::table('user')->where('name', 'like', '%张%')->select();

In this statement, the first parameter of the where method is the condition to be queried, where 'name' is the data The field name in the table, the second parameter 'like' indicates that we want to perform fuzzy matching, and the third parameter '%张%' is the string that needs to be matched. % means that it can match any number of any characters, so that all users whose names contain "Zhang" can be found.

In addition to using the query methods provided by the Db class, ThinkPHP also provides some more advanced query methods, such as model query and related query, etc. Model queries are performed by defining model classes, which can make queries more concise. For example, we can define a searchByName method in the User model to query all users whose names contain the specified string:

class User extends Model
{
    public function searchByName($keyword)
    {
        return $this->where('name', 'like', '%' . $keyword . '%')->select();
    }
}

In this method, $this represents the object of the current User model, and the where method is The same as described above, except that the Db class is replaced by $this. We can also encapsulate this query method so that it can be reused throughout the entire application:

class User extends Model
{
    public static function searchByName($keyword)
    {
        return self::where('name', 'like', '%' . $keyword . '%')->select();
    }
}

Here we change the searchByName method to a static method and replace $this with self, so that You can directly call the User::searchByName() method anywhere to query.

Associative query refers to using the JOIN statement to connect multiple related data tables for query. Relevant queries in ThinkPHP are implemented by defining model associations. The specific implementation method is beyond the scope of this article. However, it should be noted that when performing fuzzy queries, the JOIN statement will reduce the query efficiency. In this case, you can consider performing fuzzy queries first. , and then perform related queries, or use caching and other methods to improve query speed.

To summarize, fuzzy queries in ThinkPHP generally require the use of the where method and like method of the Db class, or the use of model queries and related queries. It should be noted that when performing fuzzy queries, you need to pay attention to query efficiency and correctness, and try to avoid using too complex matching methods.

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