PHP获取数据从数据库

Question

我试图从主题标签读取数据，其中为＃A2或#ar包括hashtag但不是我的代码工作

$sql_query = mysqli_query($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

你也可以使用你的方法做到这一点，但你只需要将#a2用引号括起来

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

希望它可以帮助