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Are you sure you're getting results from your query? Your query/code doesn't make a whole lot of sense anyway. Your querying for records where SubRenew = 30, and the only data you're using as a result of that query is the SubRenew column which is guaranteed to be 30 at that point so why bother?

Look at the cleaned up block of your code loop; foreach ($result as $row) { $mail->addAddress('[email protected]', 'James Coates'); $mail->Body("This subscription is expiring on" . $row['subRenew']); $mail->send(); // DROP THIS LINE!!! if (!$mail->Send()) echo 'Something went wrong'; else echo 'Mail sent to somebody Complete.'; //Clear all addresses and attachments for the next iteration $mail->clearAddresses(); $mail->clearAttachments(); } As you can see you were doing the send (?) twice although function names are different. Secondly - where are you using the results of your query loop? I see a static address but nothing from your loop.

The purpose of that is to change a date string (eg '19-04-2022') which is in %d-%m-%Y format to a correct DATE format. RTFM - https://dev.mysql.com/doc/refman/5.7/en/date-and-time-functions.html#function_str-to-date