MySQL CREATE TRIGGER using php [duplicate] - php

Question

This question already has answers here:
When to use single quotes, double quotes, and backticks in MySQL
(13 answers)
Closed 6 years ago.
I have read some other posts like mine, but none of them solve my problem,
I have two tables, user and purchase, When a user signup, I want to add the same user_id to the purchase table as well. I try to right a php code for that like this:
$query = "CREATE TRIGGER `purchase_insert` AFTER INSERT ON `user` FOR EACH ROW BEGIN INSERT INTO purchase (user_id) VALUES (NEW.user_id)";
$result = mysqli_query($connection, $query);
if($result){echo "<br>TRIGGER Success!";} else {die("<br>Database query failed. " . mysqli_error($connection));}
this is the error I get:
Database query failed. You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
I'm sorry if the question is repetitious.

Answer 1

It should be back tick not single quotes
CREATE TRIGGER `purchase_insert` AFTER INSERT ON `user` FOR EACH ROW BEGIN INSERT INTO purchase (user_id) VALUES (NEW.user_id)
UPDATE
Try this
DELIMITER$$
CREATE TRIGGER `purchase_insert`
AFTER INSERT ON `user`
FOR EACH ROW
BEGIN
INSERT INTO purchase (user_id) VALUES (NEW.user_id);
END$$
DELIMITER ;