我需要编写一个 php 脚本，它将接受 csv 文件作为输入，然后解析其中提供的产品 url。

然后我需要验证哪些产品 url 存在，哪些不存在。 我有这两个选项 curl() 和 get_headers()。

那么你能告诉我哪个更快更可靠吗？

任何帮助将不胜感激。

最佳答案

我用 100 个不同的域测试了这个:

$urls = [
  "http://familyshare.com/",
  "http://elitedaily.com/",
  "http://www.pickthebrain.com/",
  "http://i100.independent.co.uk/",
  "http://thingsorganizedneatly.tumblr.com/",
  "http://www.cheatsheet.com/",
  "https://jet.com/",
  "https://nightwalk.withgoogle.com/en/panorama",
  "http://www.vumble.com/",
  "http://fusion.net/",
  "https://www.zozi.com",
  "http://joshworth.com/dev/pixelspace/pixelspace_solarsystem.html",
  "http://how-old.net/",
  "https://www.dosomething.org",
  "https://devart.withgoogle.com/",
  "http://www.ranker.com/",
  "http://the-toast.net/",
  "https://www.futurelearn.com/",
  "https://croaciaaudio.com/",
  "http://www.thesimpledollar.com/",
  "http://giphy.com/giphytv",
  "http://snapzu.com/",
  "https://www.touchofmodern.com/",
  "http://www.howstuffworks.com/",
  "http://www.sporcle.com/",
  "http://www.factcheck.org/",
  "https://www.privacytools.io/",
  "http://tiffanithiessen.com/",
  "http://www.supercook.com/",
  "http://www.livescience.com/",
  "http://www.freshnessmag.com",
  "http://www.abeautifulmess.com/",
  "http://cardboardboxoffice.com/",
  "http://www.takepart.com/",
  "http://www.fixya.com/",
  "http://bestreviews.com/",
  "http://theodysseyonline.com/",
  "http://justdelete.me/",
  "http://adventure.com/",
  "http://www.carryology.com/",
  "http://whattheysee.tumblr.com/",
  "https://unsplash.com/",
  "http://fromwhereidrone.com/",
  "http://www.attn.com/",
  "http://ourworldindata.org/",
  "http://www.melty.com/",
  "http://www.truthdig.com/",
  "https://tosdr.org/",
  "https://thinga.com/",
  "http://forvo.com/",
  "http://tiii.me/",
  "https://snapguide.com/",
  "http://www.tubefilter.com/",
  "http://www.inherentlyfunny.com/",
  "http://www.someecards.com/",
  "https://this.cm/",
  "http://littlebigdetails.com/",
  "http://clapway.com/",
  "http://www.nerdfitness.com/",
  "http://iwantdis.com/",
  "http://Racked.com",
  "http://thesweetsetup.com/",
  "http://www.we-heart.com/",
  "https://www.revealnews.org/",
  "https://featuredcreature.com/",
  "http://www.scotthyoung.com/blog/",
  "http://www.thehandandeye.com/",
  "http://www.thenorthernpost.com/",
  "http://www.welzoo.com/",
  "http://www.tickld.com/",
  "http://thinksimplenow.com/",
  "http://www.quietrev.com/",
  "http://www.freshoffthegrid.com/",
  "https://www.generosity.com/",
  "http://addicted2success.com/",
  "http://cubiclane.com/",
  "http://waitbutwhy.com/",
  "http://toolsandtoys.net/",
  "http://googling.co/",
  "http://penelopetrunk.com/",
  "http://iaf.tv/",
  "http://artofvisuals.com/",
  "http://www.lifeaftercollege.org/blog",
  "http://listverse.com/",
  "http://chrisguillebeau.com/",
  "http://expeditionportal.com/",
  "http://www.marieforleo.com/",
  "http://mostexclusivewebsite.com/",
  "http://www.alphr.com/",
  "http://www.rtings.com/",
  "http://all-that-is-interesting.com/",
  "http://theunbeatnpath.xyz/",
  "http://www.keepinspiring.me/",
  "https://paidtoexist.com/blog/",
  "http://www.lovethispic.com/",
  "http://riskology.co/blog/",
  "http://geyserofawesome.com/",
  "http://www.eugenewei.com/",
  "http://clickotron.com/"
];


$startTime = microtime(true);
  stream_context_set_default(
      array(
          'http' => array(
              'method' => 'HEAD'
          )
      )
  );
  $headers1 = [];
  foreach ($urls as $url) {
    $headers1[] = get_headers($url);
  }
$endTime = microtime(true);
$elapsed = $endTime - $startTime;
echo "Execution time : $elapsed seconds \n";


$startTime = microtime(true);
  $headers2 = [];
  foreach ($urls as $url) {
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL,            $url);
    curl_setopt($ch, CURLOPT_HEADER,         true);
    curl_setopt($ch, CURLOPT_NOBODY,         true);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_TIMEOUT,        10);
    $header2[] = curl_exec($ch);
  }
$endTime = microtime(true);
$elapsed = $endTime - $startTime;
echo "Execution time : $elapsed seconds \n";

get_headers(GET) 与 cURL:

Execution time : 139.95884609222 seconds
Execution time : 65.998840093613 seconds

get_headers(HEAD)与 cURL:

Execution time : 114.60515785217 seconds
Execution time : 66.077962875366 seconds

所以 cURL 确实显着更快。

关于php - get_headers() 与 curl () 哪个更快？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/29844926/