抓取結果集對象中數據並且轉換數組
$row = mysqli_fetch_assoc(結果集對象);
從結果集對象中抓取一行記錄->轉換關聯數組
$row = mysqli_fetch_row(結果集對象);
從結果集對象中抓取一行記錄->轉換索引數組

例子：

<?php
//1:創建連接
$conn = mysqli_connect("127.0.0.1","root","","dangdang");
//2:設置編碼
mysqli_query($conn,"SET NAMES UTF8");
//3:創建sql,發送sql
$sql = "SELECT * FROM dd_book";
 
$result = mysqli_query($conn,$sql);
//4:獲取返回結果
//5:抓取一行記錄 關聯數組
while($row = mysqli_fetch_assoc($result)){
    echo $row[‘id‘].$row[‘title‘].‘<br/>‘;
}
//6: 抓取一行記錄，索引數組
//while($row = mysqli_fetch_row($result)){
//    echo $row[0].$row[1].‘<br />‘;
//}

?>

php mysql 查詢