if-query不起作用PHP [关闭]

Question

Why does it always insert something in the Mysql table, if i fill in nothing on the html website.

My code:

if($message =! ""){
$result = mysql_query("INSERT INTO Blog (Inhalt) VALUES ('$message')");}

Answer 1

You have made a mistake: should be != "" but not a =! ""

Use :

 if($message != ""){
        $result = mysql_query("INSERT INTO Blog (Inhalt) VALUES ('$message')");
   }

OR:

if($message){
        $result = mysql_query("INSERT INTO Blog (Inhalt) VALUES ('$message')");
   }