如何检查电子邮件是否已经注册？

尝试此操作，使用您的连接凭据填写DB_NAME，DB_USER_NAME和DB_USER_PASS，或者如果所有内容都正确地设置为PDO对象，则使用$
con变量：

$con = new PDO( 'mysql:host=localhost;dbname=DB_NAME;charset=UTF-8', 'DB_USER_NAME', 'DB_USER_PASS' );$query = $con->prepare( "SELECt `email` FROM `tbl_name` WHERe `email` = ?" );$query->bindValue( 1, $email );$query->execute();if( $query->rowCount() > 0 ) { # If rows are found for query     echo "Email found!";}else {     echo "Email not found!";}