Gfrktyl

First time creating and constructing a PHP Object Class from scratch/near-scratch. Currently not using any pre-built class frameworks (although highly considering using an already constructed class like php-curl-class as a composer dependency down the line).

<?php



// Define Constants, etc.



require_once '../includeclass.php';



class Curl



    {

    const cookieJar = ROOT_DIR . DS . 'assets' . DS . 'cookie.txt';



    public function get($url, $proxy = NULL)

        {

        $this->curl = curl_init($url);

        $this->proxy = $proxy;

        $this->setup($this->proxy);

        return $this->request();

        }



    public function setup($proxy)

        {

        $this->headers = array();

        $this->truncateCookie();



        // Gets Random UserAgent (not included in post/review)

        $this->ua = $this->getUA();

        if ($proxy !== NULL)

            {

            $this->proxy = explode(':', $proxy) [0];

            $this->proxyport = explode(':', $proxy) [1];

            curl_setopt($this->curl, CURLOPT_PROXY, $this->proxy);

            curl_setopt($this->curl, CURLOPT_PROXYPORT, $this->proxyport);

            }



        curl_setopt($this->curl, CURLOPT_CONNECTTIMEOUT, 60);

        curl_setopt($this->curl, CURLOPT_TIMEOUT, 300);

        curl_setopt($this->curl, CURLOPT_RETURNTRANSFER, true);

        curl_setopt($this->curl, CURLOPT_FOLLOWLOCATION, true);

        curl_setopt($this->curl, CURLOPT_SSL_VERIFYPEER, false);

        curl_setopt($this->curl, CURLOPT_SSL_VERIFYHOST, false);

        curl_setopt($this->curl, CURLOPT_ENCODING, 1);

        curl_setopt($this->curl, CURLOPT_COOKIESESSION, 1);

        curl_setopt($this->curl, CURLOPT_COOKIEJAR, self::cookieJar);

        curl_setopt($this->curl, CURLOPT_COOKIEFILE, self::cookieJar);

        curl_setopt($this->curl, CURLOPT_USERAGENT, $this->ua);

        curl_setopt($this->curl, CURLOPT_HTTPHEADER, array(

            'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8',

            'Accept-Language:en-US,en;q=0.9',

            'Cache-Control: max-age=0',

            'Connection: keep-alive',

            'Host: example.com'

        ));

        curl_setopt($this->curl, CURLOPT_HEADERFUNCTION, array(

            $this,

            'headerCallback'

        ));

        }



    public function truncateCookie()

        {

        $cookie = ROOT_DIR . DS . 'assets' . DS . 'cookie.txt';

        $opencookiefile = @fopen($cookie, "r+");

        if ($opencookiefile !== false)

            {

            ftruncate($opencookiefile, 0);

            fclose($opencookiefile);

            }

        }



    public function headerCallback($curl, $header)

        {

        $this->headers = $header;

        $len = strlen($header);

        $header = explode(':', $header, 2);

        if (count($header) < 2) return $len;

        $name = strtolower(trim($header[0]));

        if (!array_key_exists($name, $this->headers)) $this->headers[$name] = [trim($header[1]) ];

          else $this->headers[$name] = trim($header[1]);

        return $len;

        }



    public function request()

        {

        $this->curldata = curl_exec($this->curl);

        $curlinfo = curl_getinfo($this->curl);

        $respTime = $curlinfo['connect_time'];

        $httpcode = curl_getinfo($this->curl, CURLINFO_HTTP_CODE);



        // Condition to Ensure curldata returns HTML

        if (preg_match("//[a-z]*>/i", $this->curldata) != 0) {

        // Condition to match download_size vs downloaded_size to ensure curl completed 

        // entire request in full (only applicable on some URLs that do 

        // not have any encoding in headers and actually show the 

        // content-length in retrieved headers/headers array

        if (isset($this->headers['content-length'][0]))

            {

            $download_size = (int)$this->headers['content-length'][0];

            $downloaded_size = strlen($this->curldata);

            if ($httpcode === 200 && $download_size === $downloaded_size)

                {

                curl_close($this->curl);

                return $this->curldata;

                }

            }



        if ($httpcode === 200)

            {

            curl_close($this->curl);

            return $this->curldata;

            }

        }



    echo "rnrn" . "Failed: " . curl_errno($this->curl) . "rnrn";

    curl_close($this->curl);

    return false;

    }



    // Extra I'm including, not shown in example below

    // Recursive Loop to Retry Curl Request until a Valid Response 

    // (still need to modify to create a max attempts condition..)



public function curlLoop(curl $curl, $url)

    {

    $count = 0;

    while (true)

        {

        $count++;

        echo "rnrn#" . $count . ": " . $url . "rnrn";

        outputFlush();

        $html = $curl->get($url);

        if ($html !== false)

            {

            break;

            }

        }



    return $html;

    }



// end Class

}

And I'm using it like such (only thing functions shown doesn't hit on is my curlLoop function, which I included just for fun mostly (still needs to work, so not particularly relevant for Review):

$curl = new Curl();

$resp = $curl->get($url, $proxy);

if ($resp === FALSE) {

//curl response failed

return false; 

}

else {

// do whatever, successful curl response --- $resp = $this->curldata

Happy with this so far, the code works as shown.
Couple of setbacks/issues I'm having, major point being (and question in point from title), how would I best manage/account for the myriad of different URLs being passed through?

As discussed in my comments in the class, some conditions are only applicable to certain URLs.

As of right now, my Class is unsupported if the content-length header is shown and the curl response has encoded request headers (which makes strlen($this->curldata); a few kb bit less than what the headers display).
I want this here, as it has saved me a few times where the curl response was 200 but the request for some reason failed/did not download entirely.

Additionally, I'm a bit perplexed on how to add conditions for the proper headers. As you can see, the headers are hardwired to the url example.com for all requests. This is of course a big issue as headers should be appropriated to certain URLs.

Lastly, the blanket public statement for all methods in the class is an obvious issue. I still need to go over method visibilities and do some testing, so comment on this or not.

Any reviews/comments very much appreciated.. mostly learning as I go so progress can be a bit rocky at times.