How to play this python code in php? - php

Question

I want to convert the python function below to PHP function, if someone could help a little bit I'd appreaciate it:
p.s .: I know that for those who master the process the question may seem simple and repetitive (there are several posts about converting function in the Stack), however, for beginners it is quite complicated.
def resolvertest(url):
if not 'http://' in url:
url = 'http://www.exemplo.com'+url
log(url)
link = abrir_url(url)
match=re.compile('<iframe name="Font" ="" src="(.*?)"').findall(link)[0]
req = urllib2.Request(match)
req.add_header('User-Agent', 'Mozilla/5.0 (Linux; Android 4.4.2; Nexus 4 Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.114 Mobile Safari/537.36')
response = urllib2.urlopen(req)
link=response.read()
response.close()
url = re.compile(r'file: "(.+?)"').findall(link)[0]
return url

Answer 1

I created a function to pass all url calls through the curl getcurl($url), making it easier to read the pages and their contents.
We use a kind of loop that will go through all the sub-links you have on the page, until you get to the final page, when it arrives there, if($link) is no longer called, and your regex file: "(. +?)" is executed, capturing the desired content.
The script is written in a simple way.
$url = "http://www.exemplo.com/content.html";
$file_contents = getcurl($url);
preg_match('/<iframe name="Font" ="" src="(.*?)"/', $file_contents, $match_url);
#$match = $match_url[1];
function get_redirect($link){
$file_contents = getcurl($link);
preg_match('/<a href="(.*?)"/', $file_contents, $match_url);
#$link = $match_url[1];
if($link){
return get_redirect($link);
}else {
preg_match('/file: "(.+?)"/',$file_contents, $match_content_url);
#$match_content_url = $match_content_url[1];
return $match_content_url;
}
}
function getcurl($url){
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$url = curl_exec($ch);
curl_close ($ch);
return $url;
}
$content = get_redirect($match);
echo $content;

Answer 2

From my limited Python knowledge I'd assume this does the same:
function resolvertest($url) {
if (strpos($url, 'http://') === FALSE) {
$url = 'http://www.exemplo.com' . $url;
}
echo $url; // or whatever log(url) does
libxml_use_internal_errors(true);
$dom = new DOMDocument;
$dom->loadHTML($url);
libxml_use_internal_errors(false);
$xpath = new DOMXPath($dom);
$match = $xpath->evaluate('//iframe[#name="Font"]/#src')->item(0)->nodeValue;
$ua = stream_context_create(['http' => ['user_agent' => 'blah']]);
$link = file_get_contents($match, false, $ua);
preg_match('~file: "(.+?)~', $link, $matches);
return $matches[1];
}
Note that I didn't use a Regular Expression to get the iframe src, but actually parsed the HTML and used XPath. Getting the final link does use a Regex, because it seems to match some JSON and not HTML. If so, you want to use json_decode instead for more reliable results.