誰かが間違いを見つけることができますか:
mysqli_query($connection, "INSERT INTO comments (event_id, fulltext, date_posted) VALUES (5, 'Hallo', 430234)");
接続は確立されますが、新しい行は挿入されません。
include("../../connect.php");
$event_id = intval($_GET["event_id"]);
$fulltext = $_GET["fulltext"];
$date = intval($_GET["date"]);
mysqli_query($connection, "INSERT INTO comments ('event_id', 'fulltext', 'date_posted') VALUES (5, 'Hallo', 430234)");
echo "INSERT INTO comments (event_id, fulltext, date_posted) VALUES (5, 'Hallo', 430234)";
mysqli_close($connection);