问如何在多维PHP数组中获取next()？

EN

$current_page = 'Artist'; // as an example

$prev = $next = false; // the keys you're trying to find

$last = false; // store the value of the last iteration in case the next element matches

// flag if we've found the current element so that we can store the key on the next iteration
// we can't just use $last here because if the element is found on the first iteration it'll still be false
$found = false;

foreach ($products as $key => $value) {

    // if we found the current key in the previous iteration
    if ($found) {
        $next = $key;
        break; // no need to continue
    }

    // this is the current key
    if ($key == $current_page) {
        $found = true;
        $prev = $last;
    }

    $last = $key; // store this iteration's key for possible use in the next iteration
}

function custom_array_pagination($data = array()) {

    $current_page = 'Baseball-Bat-Swing';    //$current_page = $_GET['product']; //Change to this when you have set up your final code
    $data_keys = array_keys($data);  //This is the array all the work is done

    $s = '';

    if (!in_array($current_page, $data_keys)) {  //If there is no such element as the $_GET element in the array
        return $s;
    }

    $is_first = false;
    $is_last = false;
    $found_prev = false;
    $found_next = false;

    $next_text = '';

    if ($current_page == $data_keys[0]) {
        $is_first = true;
    }
    if ($current_page == end($data_keys)) {
        $is_last = true;
    }

    $s .= '<ul class="pagination">';

    if ($is_first) {    //If it is the first element then show only text
        $s .= '<li class="first">First'.'</li>';
    } else {
        $s .= '<li class="first"><a href="'.$data_keys[0].'">First</a>'.'</li>';
    }

    foreach($data_keys as $key => $value) {

        if ($is_first && !$found_prev) {   //If it is the first element then show only text
            $found_prev = true;
            $s .= '<li class="prev">Prev'.'</li>';
        } else {
            if (!$found_prev) { //If prev has not been found yet
                $prev = $data_keys[array_search($current_page, $data_keys) - 1];
                $found_prev = true;
                $s .= '<li class="prev"><a href="'.$prev.'">Prev</a>'.'</li>';
            }
        }

        if ($current_page == $value) {
            $s .= '<li class="current">'.$data[$value]['name'].'</li>';
        } else {
            $s .= '<li class="current"><a href="'.$value.'">'.$data[$value]['name'].'</a>'.'</li>';
        }

        if ($is_last && !$found_next) {   //If it is the last element then show only text
            $found_next = true;
            $next_text = '<li class="next">Next'.'</li>';
        } else {
            if (!$found_next) { //If next has not been found yet
                if ($value == $data_keys[count($data_keys) - 1]) {    //If this value is the last value in the table
                    $found_next = true;
                    $next = $data_keys[array_search($current_page, $data_keys) + 1];
                    $next_text = '<li class="next"><a href="'.$next.'">Next</a>'.'</li>';
                }
            }
        }

    }

    $s .= $next_text;

    if ($is_last) { //If it is the last element then show only text
        $s .= '<li class="last">Last</li>';
    } else {
        $s .= '<li class="last"><a href="'.$data_keys[count($data_keys) - 1].'">Last</a>'.'</li>';
    }

    return $s;

}

echo custom_array_pagination($products);