monicapaula

Hi. I already found the answer. Maybe my files weren’t compatible that’s why it didn’t work but here is the full code.

<?php
    function my_password_form() {
        global $post;
        $label = 'pwbox-'.( empty( $post->ID ) ? rand() : $post->ID );
        $o = '<form action="' . get_option('siteurl') . '/wp-login.php?action=postpass" method="post">
        ' . __( "To view this protected post, enter the password below:" ) . '
        <label for="' . $label . '">' . __( "Password:" ) . ' </label><input name="post_password" id="' . $label . '" type="password" size="20" maxlength="20" /><input type="submit" name="Submit" value="' . esc_attr__( "Submit" ) . '" />
        </form>
        ';
        return $o;
    }
    add_filter( 'the_password_form', 'my_password_form' );
    ?>

NOTE : I am using WordPress 3.9.2