wpdb更新查询不起作用

Question

我已经制作了一个电子邮件脚本,只要wp_mail有结果就应该更新.出于某种原因,我的价值不会更新.我错过了什么吗？我收到邮件,所以wp_mail工作.

干杯!

$email_result = wp_mail( $to, $subject, $message, $headers );

if( $email_result ){//wp_mail() processed the request successfully
    global $wpdb;
    $table_name = $wpdb->prefix . "wpsc_coupon_codes";
    $coupon_id = $ereminder->ID;

$ereminders = $wpdb->query( $wpdb->prepare("
    UPDATE *
    FROM $table_name
    SET reminder = 1
    WHERE ID = $coupon_id
") );

}

Answer 1

试试这个:

$wpdb->update( $table_name, array( 'reminder' => 1),array('ID'=>$coupon_id));

Answer 2

试试这个

UPDATE  $table_name
SET reminer = 1
WHERE ID = $coupon_id

Answer 3

我们可以$wpdb->update这样使用：

 global $wpdb;
 $table_name = $wpdb->prefix.'your_table_name';
 $data_update = array('row_name_1' => $row_data_1 ,'row_name_2' => $row_data_2);
 $data_where = array('row_name' => $row_data);
 $wpdb->update($table_name , $data_update, $data_where);