QUESTION Load ajax subpage

[werty1001]

Slice the array using the page number via query string
See array_slice

Thanks, i add this code in functions.php

PHP Code:

if($_POST['ajaxload']) {

    $num = $_POST['ajaxload'];    
    $children=getChildren(news);
    $sliced = array_slice($children, 0, $num);
    
    foreach ($sliced as $subpage){
        $title=returnPageField($subpage,'title');
        $url=returnPageField($subpage,'slug');
        echo '<li><a href="/'.$url.'.html">'.$title.'</a></li>';
     }

} 


Code:

$('body').on('click', '#load', function() {

    
    $.ajax({  
                    type: "POST",  
                    url: "/theme/news/functions.php",
                    context: this,
                    data: {
                           ajaxload : '10'
                    },
                    success: function(data) {
             console.log(data);
                        alert(data);
                    },
                    error: function(output){
                      alert(resp);
                    }
                });
        
});

But onclick error

<b>Fatal error</b>: Call to undefined function getChildren()