<select name="webone_sms_gravity_sender_number" required style="min-width: 300px;">
    <option value="">انتخاب</option>
    <?php foreach($sender_numbers as $number): ?>
        <option value="<?php echo $number; ?>"
            <?php echo $selected_sender_number === $number ? 'selected' : ''; ?>
        >
            <?php echo $number; ?>
        </option>
    <?php endforeach; ?>
</select>