PHP 按值调用向主函数返回较少的值

Question

我有一个奇怪的问题，我写了一个递归函数来从 facebook 获取更多结果。在被调用函数（递归）中，我将值返回给主函数。在被调用的函数中，当我打印返回值时，它会显示确切的值（通常是数组大小 90）。但是在主函数中，当我打印返回值时，它总是更少（每次数组大小正好是 50）。这是我的代码..

public function mainFunction(){
    $response = $fb->get('/me?fields=id,name,accounts', $useraccesstoken);    
    $userData = $response->getDecodedBody();
    $pages = $userData['accounts'];
    $pages = $this->getMorePages($pages);
}

public function getMorePages($pages){
    if(count($pages)>1 && isset($pages['paging']['next'])){
        $morePages = file_get_contents($pages['paging']['next']);
        $morePages = json_decode($morePages,true);
        foreach($morePages['data'] as $page){
            array_push($pages['data'],$page);
        }
        if(count($morePages)>1 && isset($morePages['paging']['next'])) {
            $pages['paging']['next']=$morePages['paging']['next'];
            $this->getMorePages($pages);
        }
        return $pages;
    }else{
        return $pages;
    }
}

我的代码有什么问题..？

Answer 1

您正在使用递归函数，但内部调用未使用值 return...

固定码为：

public function getMorePages($pages){
    if(count($pages)>1 && isset($pages['paging']['next'])){
        $morePages = file_get_contents($pages['paging']['next']);
        $morePages = json_decode($morePages,true);
        foreach($morePages['data'] as $page){
            array_push($pages['data'],$page);
        }
        if(count($morePages)>1 && isset($morePages['paging']['next'])) {
            $pages['paging']['next']=$morePages['paging']['next'];

            // Add return values to the main array
            //$pages += $this->getMorePages($pages);
            // For more support use array_merge function
            $pages = array_merge( $this->getMorePages($pages), $pages )
        }
        return $pages;
    }else{
        return $pages;
    }
}

PHP 按值调用向主函数返回较少的值

PHP call by value returning less value to the main function

php

function

recursion

laravel-5

call-by-value