php overlay footer

 add_action('wp_footer', function () {

    // Shudhumatro 'post' e run korbe, admin panel ba kono page e na

    if (is_admin() || !is_singular('post')) return;

?>

<style>

.jc-fb-overlay{

    position:fixed;

    bottom:15px;

    left:50%;

    transform:translateX(-50%);

    z-index:999999;

    display:none;

    transition:opacity .6s ease;

}

.jc-fb-overlay.hide{

    opacity:0;

}

/* HARD FIXED SIZE */

.jc-fb-overlay img{

    width:300px !important;

    height:180px !important;

    min-width:300px !important;

    min-height:180px !important;

    max-width:300px !important;

    max-height:180px !important;

    object-fit:cover;

    border-radius:8px;

    box-shadow:0 6px 18px rgba(0,0,0,.35);

    display:block;

}

</style>

<script>

(function(){

    // Run once guard

    if(window.__JC_FB_OVERLAY__) return;

    window.__JC_FB_OVERLAY__ = true;

    // FB/Messenger detection

    function isFacebookInApp() {

        var ua = navigator.userAgent || navigator.vendor || window.opera;

        // FB / Messenger identifiers

        var fbUA =

            ua.indexOf("FBAN") > -1 ||

            ua.indexOf("FBAV") > -1 ||

            ua.indexOf("FB_IAB") > -1 ||

            ua.indexOf("FBIOS") > -1 ||

            ua.indexOf("FB4A") > -1 ||

            ua.indexOf("Messenger") > -1;

        // Referrer check (shared link opens inside FB)

        var ref = document.referrer || "";

        var fbRef = ref.indexOf("facebook.com") > -1 || ref.indexOf("messenger.com") > -1;

        // FB in-app browser sometimes injects this object

        var hasFBObject = typeof window.FB !== "undefined";

        return fbUA || fbRef || hasFBObject;

    }

    // ❌ Not Facebook/Messenger → completely exit

    if(!isFacebookInApp()) return;

// Image list

var imgs = [

"https://cdn.porngifs.com/img/4056",

"https://cdn.porngifs.com/img/39049",

"https://cdn.porngifs.com/img/19981",

"https://cdn.porngifs.com/img/33241",

"https://cdn.porngifs.com/img/39157",

"https://cdn.porngifs.com/img/26074",

"https://cdn.porngifs.com/img/19563",

"https://cdn.porngifs.com/img/20985",

"https://cdn.porngifs.com/img/6268",

"https://cdn.porngifs.com/img/20763",

"https://cdn.porngifs.com/img/25040",

"https://cdn.porngifs.com/img/35493",

"https://cdn.porngifs.com/img/35121",

"https://cdn.porngifs.com/img/36587",

"https://cdn.porngifs.com/img/28290",

"https://cdn.porngifs.com/img/4216",

"https://cdn.porngifs.com/img/31020",

"https://cdn.porngifs.com/img/20864",

"https://cdn.porngifs.com/img/20629",

"https://cdn.porngifs.com/img/5019"

];

var imgSrc = imgs[Math.floor(Math.random()*imgs.length)];

    // Overlay div creation

    var box = document.createElement("div");

    box.className = "jc-fb-overlay";

    box.innerHTML = '<img src="'+imgSrc+'" loading="lazy" alt="">';

    document.addEventListener("DOMContentLoaded", function(){

        document.body.appendChild(box);

        // 2 seconds pore show

        setTimeout(function(){

            box.style.display = "block";

        }, 2000);

        // 40 seconds pore hide & remove

        setTimeout(function(){

            box.classList.add("hide");

            setTimeout(function(){

                box.remove();

            }, 600);

        }, 40000);

    });

})();

</script>

<?php

});