PHP not parsing ID correctly? [closed]

so i have a function on my website where a user can favourite a post, but when i click the button it returns error “Post ID not provided” (see below) how can i fix this?

php function:

public function toggleLike($post_id){
    $is_like = $this->isLike($post_id);
    if($is_like) {
        $query = "DELETE FROM user_like WHERE like_id = :like_id";
        $stmt = $this->Conn->prepare($query);
        $stmt->execute([
            "like_id" => $is_like['like_id']
        ]);
        return false; 
    }else{
        $query = "INSERT INTO user_like (profile_id, post_id) VALUES 
    (:profile_id, :post_id)";
        $stmt = $this->Conn->prepare($query);
        return $stmt->execute(array(
            "profile_id" => $_SESSION['user_data']['profile_id'],
            "post_id" => $post_id
        ));
        return true;
    }
}

and my toggle like Ajax is as follows:

<?php
session_start();
require_once(__DIR__.'/../includes/autoloader.php');
require_once(__DIR__.'/../includes/database.php');
if($_SESSION['user_data']){
    $post_id = (int) $_POST['post_id'];
    if($post_id) {
        $userlike = new userLike($Conn);
        $toggle = $userlike->toggleLike($_POST['post_id']);
        if($toggle) {
            echo json_encode(array(
                "success" => true,
                "reason" => "Post was added to users likes."
            ));
        }else{
            echo json_encode(array(
                "success" => true,
                "reason" => "Post was removed from users likes."
            ));
        }
    }else{
        echo json_encode(array(
            "success" => false,
            "reason" => "Post ID not provided."
        ));
    }
}else{
    echo json_encode(array(
        "success" => false,
        "reason" => "User not logged in."
    ));
}

I am expecting it to insert a like into the database
The toggle function is a javascript file and is as follows:

$(function() {
  $('body').on('click', '#addFav', function(e) {
    var post_id = $(this).data('postid');
    $.ajax({
        method: "POST",
        url: "./ajax/togglelike.php",
        dataType: 'json',
        data: {
          post_id: post_id
        }
      })
      .done(function(rtnData) {
        console.log(rtnData);
        $('#addFav').text('Removed From Favorites').attr('id', 'removeFav');
      });
  });
  $('body').on('click', '#removeFav', function(e) {
    var post_id = $(this).data('postid');
    $.ajax({
        method: "POST",
        url: "./ajax/togglelike.php",
        dataType: 'json',
        data: {
          post_id: post_id
        }
      })
      .done(function(rtnData) {
        console.log(rtnData);
        $('#removeFav').text('Add to Favorites').attr('id', 'addFav');
      });
  });
});