PHP从数据库中获取数据

Question

我正在尝试从hashtag中获取数据，其中＃a2或#ar hashtag但不能使用我的代码

$sql_query = mysqli_query($conn, "SELECT * FROM posts WHERE hashtag=#a2");

Answer 1

试试这个，

$data = "#a2";
$sql_query = mysqli_query($conn, "SELECT * FROM posts WHERE hashtag LIKE '%$data%'");

Answer 2

$sql_query = mysqli_query($conn, "SELECT * FROM posts WHERE hashtag LIKE '%#a2%'");

Answer 3

您也可以使用自己的方法进行操作，但只需将#a2括在引号中，例如

$sql_query = mysqli_query($conn, "SELECT * FROM posts WHERE hashtag='#a2'");

希望有所帮助