How to count the number of records under specified conditions in ThinkPHP5

The following tutorial column will introduce to you the method of counting the number of records under specified conditions in ThinkPHP5. I hope it will be helpful to friends in need! ThinkPHP5 counts the number of records under specified conditions

Description

ThinkPHP5 counts the number of records under specified conditions

Application examples

Statistics on the number of orders

Solution

Use "aggregation query". Reference documentation

Backend code

Use model.

1. Query statement

$recordNum = \app\index\Model\Reservation::where('username','=',session('username'))->count();

2. Pay the query result to the front desk

$this->assign([
    'recordNum'=>$recordNum,
]);

Front-end code

<p>A total of {$recordNum}</p>

Result

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