如何从另一个类调用一个类中的函数？卷曲

Question

我使用 Rollingcurl 爬取各种页面。

Rollingcurl：https://github.com/LionsAd/rolling-curl

<?php
error_reporting(E_ALL);
ini_set('display_errors', 1);

require "RollingCurl.php";
require "tmdb_class.php";
$tmdb = new Tmdb;

if (isset($_GET['action']) || isset($_POST['action'])) {
    $action = (isset($_GET['action'])) ? $_GET['action'] : $_POST['action'];
} else {
    $action = "";
}

echo "  Test<br /><br />";


/*function most_popular($response, $info)
{

    $doc = new DOMDocument();

    libxml_use_internal_errors(true); //disable libxml errors

    if (!empty($response)) {
        //if any html is actually returned

        $doc->loadHTML($response);
        libxml_clear_errors(); //remove errors for yucky html

        $xpath = new DOMXPath($doc);

        //get all the h2's with an id
        $row   = $xpath->query("//div[contains(@class, 'lister-item-image') and contains(@class, 'float-left')]/a/@href");
        $nexts = $xpath->query("//a[contains(@class, 'lister-page-next') and contains(@class, 'next-page')]");
        $names   = $xpath->query('//img[@class="loadlate"]');

        foreach ($nexts as $next) {
            echo "Next URL: " . $next->getAttribute('href') . "<br/>";
        }

        foreach ($names as $name) {
            echo "Release Name: " . $name->getAttribute('alt') . "<br/>";
        }

        if ($row->length > 0) {
            foreach ($row as $row) {
                echo $doc->saveHtml($row) . "<br/>";
            }
        }

    }
}*/

if ($action == "most_popular") {

    if (isset($_GET['date'])) {
        $link = "https://www.imdb.com/search/title?title_type=feature,tv_movie&release_date=,".$_GET['date'];
    } else {
        $link = "https://www.imdb.com/search/title?title_type=feature,tv_movie&release_date=,2018";
    }

    $urls            = array($link);
    $rc              = new RollingCurl("most_popular");
    $rc->window_size = 20;
    foreach ($urls as $url) {
        $request = new RollingCurlRequest($url);
        $rc->add($request);
    }
    $stream = $rc->execute();
}

简单来说，函数“most_popular”当然可以调用。但我想为某些功能构建并调用我自己的类。

如果函数“most_popular”在我的类中，那么调用它就不是那么容易了：

我的班级：

<?php

class Tmdb
{


    public function __construct()
    {
      /* */
    }

    // SEARCH
    public function most_popular($response, $info)
    {

        $doc = new DOMDocument();

        libxml_use_internal_errors(true); //disable libxml errors

        if (!empty($response)) {
            //if any html is actually returned

            $doc->loadHTML($response);
            libxml_clear_errors(); //remove errors for yucky html

            $xpath = new DOMXPath($doc);

            //get all the h2's with an id
            $row   = $xpath->query("//div[contains(@class, 'lister-item-image') and contains(@class, 'float-left')]/a/@href");
            $nexts = $xpath->query("//a[contains(@class, 'lister-page-next') and contains(@class, 'next-page')]");
            $names = $xpath->query('//img[@class="loadlate"]');

            foreach ($nexts as $next) {
                echo "Next URL: " . $next->getAttribute('href') . "<br/>";
            }

            foreach ($names as $name) {
                echo "Release Name: " . $name->getAttribute('alt') . "<br/>";
            }

            if ($row->length > 0) {
                foreach ($row as $row) {
                    echo $doc->saveHtml($row) . "<br/>";
                }
            }

        }
    }
}

有人知道这是如何工作的吗？

这不起作用：

$rc              = new RollingCurl($tmdb->most_popular);

或

$rc              = new RollingCurl($tmdb->most_popular());

非常感谢您。

Answer 1

要将对象方法用作回调，请创建一个包含对象和方法名称的数组。

$rc = new RollingCurl([$tmdb, 'most_popular']);