Get popular post by category

Hello Ahmed,

To get the most popular posts in each category, start with getting a list of categories.
Then you will get the most popular posts for each category and finally, display them in a list.

1) Get a list of categories
The following will return an array of all the categories:

$arCat = get_categories();

See: https://developer.www.ads-software.com/reference/functions/get_categories/

2) Get the most popular posts for each category.
For this, create a function like below:

function MostPopular($NumPosts, $Category){
//Returns most popular posts.
	$query = new WP_Query( array(
		'meta_key' => 'post_views_count',
		'orderby' => 'meta_value_num',
		'posts_per_page' => $NumPosts,
		 'cat' => $Category
	) );

	wp_reset_postdata();
	return $query->posts;
}

See: https://codex.www.ads-software.com/Class_Reference/WP_Query

3) Start building the list:

$arCat = get_categories(); 	//Get array of all categories

echo '<ul>';			//Start the list
foreach ($arCat As $Category) {		// Go through each category
	echo '<li>'.$Category->name;	// Print the category name
		echo '<ul>';		// Start the posts list for each category
		     $CatID = $Category->term_id;
		     $arPopular = MostPopular(2, $CatID );	//Get posts for this category.  Only shows 2 of them

		     foreach ($arPopular As $popPost) {	//Display posts
			echo '<li>'
			       .'<a href="'.get_permalink($popPost->ID).'">'.$popPost->post_title.'</a>'	// Get Permalink for post and display
			     .'</li>';
		     }
		echo '</ul>';
	echo '</li>';

}
echo '</ul>';

See: https://developer.www.ads-software.com/reference/functions/get_categories/
See: https://developer.www.ads-software.com/reference/functions/get_permalink/