PHP按值调用返回较少的值到main函数

时间:2017-09-05 05:09:33

标签: php function recursion laravel-5 call-by-value

我有一个奇怪的问题,我写了一个递归函数来从facebook获得更多结果。在被调用的函数(递归)中,我将值返回到main函数。在被调用的函数中,当我打印返回的值时,它显示确切的值(通常是数组大小为90)。但是在主函数中,当我打印返回的值时,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..?

1 个答案:

答案 0 :(得分:1)

您正在使用递归函数但未使用内部调用返回的值...

固定代码是:

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;
    }
}