Contact Form 7 placeholder for select menu

Finally got the solution for adding placeholder/watermark in contact form7. This code is working and replacing the “—” blank value from contact form7 select menu. Add this code to your functions.php and change the text “Please select…” to your own text.

function my_wpcf7_form_elements($html) {
    $text = 'Please select...';
    $html = str_replace('<option value="">---</option>', '<option value="">' . $text . '</option>', $html);
    return $html;
}
add_filter('wpcf7_form_elements', 'my_wpcf7_form_elements');

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