Mini Shell

<?php

    include '../db/database.php';
    include 'function_date.php';
    
    $teachercrID = $_POST['teachercrID'];
    $crownID = $_POST['crownID'];
    $year = $_POST['year'];
    $date = $_POST['date'];
    
    $date1 = mydate($date);
    //เช็ค Username ซ้ำกันหรือไม่
    $sql_year = "SELECT year FROM history_crown WHERE year='$year' AND teachercrID= '$teachercrID'";
    $result_year = mysqli_query($link, $sql_year);
    $is_year = mysqli_num_rows($result_year);
    if ($is_year == 1) {
        header('Content-Type: application/json');
        $errors = "ปี พ.ศ ซ้ำกัน" . mysqli_error($link);
        echo json_encode(array('status' => 'danger','message' => $errors));
        exit;
    } 

    
    $sql = "INSERT INTO `history_crown` (`teachercrID`, `crownID`, `year`, `date`) VALUES 
          ('$teachercrID', '$crownID', '$year', '$date1')";
    $result = mysqli_query($link, $sql);
    
    if ($result) {
        header('Content-Type: application/json');
        echo json_encode(array('status' => 'success','message' => 'บันทึกข้อมูลเรียบร้อยแล้ว'));
    } else {
        header('Content-Type: application/json');
        $errors = "ไม่สามารถบันทึกข้อมูลได้";
        echo json_encode(array('status' => 'danger','message' => $errors));
    }