database - Trouble running $wpdb->query() with last_insert_id

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I am trying to get a primary key from a coupon table to put it in my target table as a foreign key. In between I would like to run a query to get the last insert id. I can't get the syntax right though

$couponId = $wpdb->query("select last_insert_id() from frequentVisitorCoupons_coupons");
  var_dump($couponId); // false
$couponId = $wpdb->query("select * from frequentVisitorCoupons_coupons where last_insert_id()");
  var_dump($couponId); // false

What is the correct syntax for this query?

I am trying to get a primary key from a coupon table to put it in my target table as a foreign key. In between I would like to run a query to get the last insert id. I can't get the syntax right though

$couponId = $wpdb->query("select last_insert_id() from frequentVisitorCoupons_coupons");
  var_dump($couponId); // false
$couponId = $wpdb->query("select * from frequentVisitorCoupons_coupons where last_insert_id()");
  var_dump($couponId); // false

What is the correct syntax for this query?

• database
• mysql
• wpdb

Share Improve this question asked May 1, 2019 at 3:07 Sean DSean D 38788 silver badges2121 bronze badges

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1 Answer 1

Sorted by: Reset to default 2

You can get the last inserted ID from $wpdb with the insert_id property:

$wpdb->insert( ... );
$couponId = $wpdb->insert_id

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