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run code in 300+ PHP versions simultaneously
<?php $to = 'troymlandon@gmail.com'; $subject = 'Test Subject'; $message = 'hello'; $headers = 'From: webmaster@example.com' . "\r\n" . 'Reply-To: webmaster@example.com' . "\r\n" . 'X-Mailer: PHP/' . phpversion(); mail($to, $subject, $message, $headers);

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