php artisan make:rule ValidMobile
php artisan make:rule ValidPassword

class ValidMobile implements ValidationRule
{
    public function __construct()
    {
        //
    }
    public function passes($attribute, $value): bool|int
    {
        return preg_match('/^9[0-9]{9}$/', $value);
    }

    public function validate(string $attribute, mixed $value, Closure $fail): void
    {
        if (!preg_match('/^9[0-9]{9}$/', $value)) {
            $fail('شماره ' . $attribute . 'شما 10 رقمی می باشد و بدون صفر وارد کنید.');
        }
    }
}

class ValidPassword implements ValidationRule
{
    public function __construct()
    {
        //
    }
    public function passes($attribute, $value): bool|int
    {
        return preg_match('/^(?=.*?[A-Z])(?=.*?[a-z])(?=.*?[0-9])(?=.*?[#?!@$ %^&*-]).{8,}$/', $value);
    }

    public function validate(string $attribute, mixed $value, Closure $fail): void
    {
        if (!preg_match('/^(?=.*?[A-Z])(?=.*?[a-z])(?=.*?[0-9])(?=.*?[#?!@$ %^&*-]).{8,}$/', $value)) {
            $fail('نوع'  . $attribute .  'نامناسب است و باید ترکیبی از حروف بزرگ و کوچک و اعداد باشد.');
        }
    }
}

use App\Rules\ValidMobile;
use App\Rules\ValidPassword;

return Validator::make($data,
       [
            'mobile' => ['nullable', 'string', 'unique:users', new ValidMobile()],
            'password' => ['required', 'string', 'confirmed', new ValidPassword()],
        ]
);

<nav class="navbar navbar-expand-lg navbar-light border-bottom menu fixed-top"></nav>

.menu.scrolling {
    background-color:rgba(40, 58, 90, 0.9);
    z-index: 9999;
    transition: all 0.5s;
}

$(window).scroll(function() {    
    var scroll = $(window).scrollTop();

    if (scroll >= 300) {
        $(".menu").addClass("scrolling");
    } else {
        $(".menu").removeClass("scrolling");
    }
});

add_filter('the_content',function ($content){
    if(is_singular('post')){
        $post_id = get_the_ID();
        ob_start();
        $args = array(
            'post_type' => 'post',
            'posts_per_page' => '1',
            'post_status' => 'publish',
            'post__not_in' => array($post_id),
            'category__in' => wp_get_post_categories($post_id),
        );
        $query = new WP_Query($args);
        if ($query->have_posts()) {
            while ($query->have_posts()) {
                $query->the_post();
                ?>
                <p>
                    <a href="<?php the_permalink(); ?>" style="padding:5px 15px;display: flex;flex-wrap:wrap;align-items: center;margin: 20px 0;border: 1px solid #ddd;border-radius: 5px;">
                        <?php the_post_thumbnail('thumbnail', ['style' => 'width:50px;height:50px;border-radius:5px;object-fit:cover;']); ?>
                        <span style="color: blue;margin: 0 15px 0 5px;font-weight: bold;display: inline-block">بیشتر بخوانید:</span>
                        <b style="color: #222;"><?php the_noscript(); ?></b>
                    </a>
                </p>
                <?php
            }
        }
        wp_reset_postdata();
        $related_html = ob_get_clean();
        $paragraphs = explode( '</p>', $content );
        $middle_index = floor( count( $paragraphs ) / 2 );
        array_splice( $paragraphs, $middle_index, 0, '<p>' . $related_html . '</p>' );
        return implode( '', $paragraphs );
    }
    return $content;
});