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Explain eai

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Marcus Bointon 2025-03-28 09:57:00 +01:00
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src/PHPMailer.php
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@ -1459,8 +1459,10 @@ class PHPMailer
* This is the pattern used in the HTML5 spec for validation of 'email' type
* form input elements (as above), modified to accept Unicode email addresses.
* This is also more lenient than Firefox' html5 spec, in order to make the regex faster.
* 'eai' is an acronym for Email Address Internationalization.
*
* @see https://html.spec.whatwg.org/#e-mail-state-(type=email)
* @see https://en.wikipedia.org/wiki/International_email
*/
return (bool) preg_match(
'/^[a-zA-Z0-9.!#$%&\'*+\/=?^_`{|}~\x80-\xff-]+@[a-zA-Z0-9\x80-\xff](?:[a-zA-Z0-9\x80-\xff-]{0,61}' .