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<?php $mails = array( 'a.yamada@yamada.com', 'a.yamada@sub.yamada.com', 'a.yamada@sub.sub.yamada.com', 'a.yamada@sub.sub.sub.yamada.com', 'a.yamada@sub.sub.sub.yamada.com', 'a.yamada@yamada.net', 'a.yamada@sub.yamada.net', 'a.yamada@sub.sub.yamada.net', 'a.yamada@sub.sub.sub.yamada.net', 'a.yamada@sub.sub.sub.yamada.net', ); foreach ($mails as $mail) { if (preg_match('/@([^.]+\.){0,}yamada.com$/', $mail)) { echo "DISCARD\n"; } else { echo "OK\n"; } }
Output for git.master, git.master_jit, rfc.property-hooks
DISCARD DISCARD DISCARD DISCARD DISCARD OK OK OK OK OK

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