What is the use of loop in Worpdress Where we used it?

Question

I am working on an API integration. Now I have a problem. First I am trying to show all specific city hotels, which city is having in my database. First FOREACH worked as well its search hotel by my database city, but on Second FOREACH I am trying to show First FOREACH city hotels show only match hotel which hotels matches from database and its not worked.

My Task is: 1st search by city which city have on my database and 2nd time search in 1st time hotel and showed hotel only match my database hotel.

1st foreach:

if($RowCount>0){
            foreach($Results as $Result){
                foreach($api_array as &$value){
                    if($Result['county'] == $value['address']['city']){ 
                        $final_array[] = $value; 
                    } 
                } 
            }
        }

2nd foreach:

foreach($final_array as &$display){
            var_dump($display);
            if($Result['hotel'] == $display['property_name']){ 
                $final_array2[] = $display; 
            }  
        }

full code:

foreach($array as $api_array){
        $final_array = array(); 
        $Results = $wpdb->get_results( "select * FROM hotels where county = '$countyname'",ARRAY_A );
        $RowCount  =  $wpdb->num_rows;

        if($RowCount>0){
            foreach($Results as $Result){
                foreach($api_array as &$value){
                    if($Result['county'] == $value['address']['city']){ 
                        $final_array[] = $value; 
                    } 
                } 
            }
        }
        foreach($final_array as &$display){
            if($Result['hotel'] == $display['property_name']){ 
                $final_array2[] = $display; 
            }  
        }
    }

Answer 1

The Loop are php code used by WordPress to display posts. Using The Loop, WordPress processes each post to be displayed on the current page.check below sample code.
<?php

if ( have_posts() ) {

while ( have_posts() ) {

the_post();

//

// Post Content here

//

} // end while

} // end if

?>