CURL and HTTPS Cannot resolve host

Question

I m trying to fetch the contents of a page using CURL   The page that is doing the fetching is https and the page it is trying to fetch is also https   I m getting an error  Couldn t resolve host  with all of the settings I try    c curl init    curl setopt  c  CURLOPT URL  url     curl setopt  c  CURLOPT USERAGENT   Mozilla 5 0  Windows  U  Windows NT 5 1  en-US  rv x x x  Gecko 20041107 Firefox x x    curl setopt   c  CURLOPT RETURNTRANSFER  TRUE     curl setopt  c  CURLOPT SSL VERIFYPEER  TRUE     curl setopt  c  CURLOPT SSL VERIFYHOST  TRUE   curl setopt  c  CURLOPT HEADER  FALSE     html curl exec  c    if  html     false        echo curl error  c     else       echo  Operation completed without any errors          curl close  c     Any ideas

User · Answer

Just a note which may be helpful- I was having this trouble with Apache on my laptop  which connects by wifi AFTER startup   and restarting the server  after connect  fixed the issue  I guess in my case this may be to do with apache starting offline and perhaps there noting that DNS lookups fail

User · Answer

I found that CURL can decide to use IPv6  in which case it tries to resolve but doesn t get an IPv6 answer  or something to that effect  and times out    You can try the command line switch -4 to test this out    In PHP  you can configure this line by setting this   curl setopt   h  CURLOPT IPRESOLVE  CURL IPRESOLVE V4

User · Answer

We need to add host security certificate to php ini file  For local developement enviroment we can add cacert pem in your local php ini   do phpinfo    and file your php ini path open and add uncomment  curl capath  curl capath path of your cacert pem

User · Answer

After tried all above  still can t resolved my issue yet    But got new solution for my problem    At server where you are going to make a request  there should be a entry of your virtual host   sudo vim  etc hosts   and insert      192 xxx x xx     www domain com   The reason if you are making request from server to itself then  to resolve your virtual host or to identify it  server would need above stuff  otherwise server won t understand your requesting origin  host

User · Answer

There is a current bug in glibc on Ubuntu which can have this effect  https   bugs launchpad net ubuntu  source glibc  bug 1674733  To resolve it  update libc and all related  Packages that will be upgraded  libc-bin libc-dev-bin libc6 libc6-dev libfreetype6 libfreetype6-dev locales multiarch-support  and restart the server

User · Answer

Your getting the error because you re probably doing it on your Local server environment  You need to skip the certificates check when the cURL call is made  For that just add the following options  curl setopt  c  CURLOPT SSL VERIFYPEER  false   curl setopt  c  CURLOPT SSL VERIFYHOST   0

User · Answer

If you do it on Windows XAMPP WAMP it probaly won t work as in my case   I solved the problem setting up Laravel s Homestead Vagrant solution to create my  Ubuntu  development environment - it has built-in  Nginx  PHP 5 6  PHP 7 3  PHP 7 2  PHP 7 1  MySQL  PostgreSQL  Redis  Memcached  Node    to name just a few   See here for info how to set up the environment - it s really worth the effort      Laravel Homestead is an official  pre-packaged Vagrant box that provides you a wonderful development environment without requiring you to install PHP  a web server  and any other server software on your local machine  No more worrying about messing up your operating system  Vagrant boxes are completely disposable  If something goes wrong  you can destroy and re-create the box in minutes    Then you can easily switch PHP versions or set up more virtual hosts  new databases just in seconds

User · Answer

I had the same problem  Coudn t resolve google com  There was a bug somewhere in php fpm  which i am using  Restarting php-fpm solved it for me

User · Answer

add yourlocalhost ex    127 0 0 1         cards localhost in the  etc hosts directory  Now restart apache server

User · Answer

Maybe a DNS issue   Try your URL against this code     h   curl init    curl setopt   h  CURLOPT HEADER  1   curl setopt   h  CURLOPT RETURNTRANSFER  1   curl setopt   h  CURLOPT HTTPGET  1   curl setopt   h  CURLOPT URL   YOUR URL     curl setopt   h  CURLOPT DNS USE GLOBAL CACHE  false    curl setopt   h  CURLOPT DNS CACHE TIMEOUT  2     var dump curl exec   h    var dump curl getinfo   h    var dump curl error   h

User · Answer

You may have to enable the HTTPS part   curl setopt  c  CURLOPT SSL VERIFYPEER  FALSE   curl setopt  c  CURLOPT SSL VERIFYHOST   2     And if you need to verify  authenticate yourself  you may need this too   curl setopt  c  CURLOPT USERPWD   username password

[php] CURL and HTTPS, "Cannot resolve host"

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