<?php $emails = str_replace(' ','','ben@wearejh.com, john@wearejh.com, mike@wearejh.com'); $recipientsArray = preg_grep('/[-0-9a-zA-Z.+_]+@[-0-9a-zA-Z.+_]+\.[a-zA-Z]+/', explode(',', $emails)); var_dump($recipientsArray);
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