PHP curl HTTP POST sample code

Question

Can anyone show me how to do a php curl with an HTTP POST   I want to send data like this   username user1  password passuser1  gender 1   To www domain com  I expect the curl to return a response like result OK   Are there any examples

User · Answer

If you try to login on site with cookies.

This code:

if ($server_output == "OK") { ... } else { ... }

May not works if you try to login, because many sites returns status 200, but the post is not successful.

Easy way to check if the login post is successful is check if it setting cookies again. If in output have Set-Cookies string, this means the posts is not successful and it starts new session.

Also the post can be successful, but the status can be redirect instead 200.

To be sure the post is successful try this:

Follow location after the post, so it will go to the page where the post do redirect to:

curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);

And than check if new cookies existing in the request:

if (!preg_match('/^Set-Cookie:\s*([^;]*)/mi', $server_output)) 

{echo 'post successful'; }

else { echo 'not successful'; }

User · Answer

Procedural    set post fields  post          username    gt   user1        password    gt   passuser1        gender      gt  1       ch   curl init  http   www example com    curl setopt  ch  CURLOPT RETURNTRANSFER  true   curl setopt  ch  CURLOPT POSTFIELDS   post       execute   response   curl exec  ch       close the connection  release resources used curl close  ch       do anything you want with your response var dump  response    Object oriented  lt  php     mutatis mutandis namespace MyApp Http   class CurlPost       private  url      private  options                              param string  url     Request URL         param array   options cURL options             public function   construct  url  array  options                      this- gt url    url           this- gt options    options                        Get the response         return string         throws  RuntimeException On cURL error             public function   invoke array  post                 ch    curl init  this- gt url                    foreach   this- gt options as  key   gt   val                 curl setopt  ch   key   val                       curl setopt  ch   CURLOPT RETURNTRANSFER  true            curl setopt  ch   CURLOPT POSTFIELDS   post             response    curl exec  ch            error       curl error  ch            errno       curl errno  ch                    if   is resource  ch                  curl close  ch                      if  0      errno                throw new  RuntimeException  error   errno                              return  response           Usage    create curl object  curl   new  MyApp Http CurlPost  http   www example com     try          execute the request     echo  curl            username    gt   user1            password    gt   passuser1            gender      gt  1            catch   RuntimeException  ex           catch errors     die sprintf  Http error  s with code  d    ex- gt getMessage     ex- gt getCode         Side note here  it would be best to create some kind of interface called AdapterInterface for example with getResponse   method and let the class above implement it  Then you can always swap this implementation with another adapter of your like  without any side effects to your application  Using HTTPS   encrypting traffic Usually there s a problem with cURL in PHP under the Windows operating system  While trying to connect to a https protected endpoint  you will get an error telling you that certificate verify failed  What most people do here is to tell the cURL library to simply ignore certificate errors and continue  curl setopt  ch  CURLOPT SSL VERIFYPEER  false     As this will make your code work  you introduce huge security hole and enable malicious users to perform various attacks on your app like Man In The Middle attack or such  Never  ever do that  Instead  you simply need to modify your php ini and tell PHP where your CA Certificate file is to let it verify certificates correctly    modify the absolute path to the cacert pem file curl cainfo c  php cacert pem  The latest cacert pem can be downloaded from the Internet or extracted from your favorite browser  When changing any php ini related settings remember to restart your webserver

User · Answer

lt  php       A very simple PHP example that sends a HTTP POST to a remote site      ch   curl init     curl setopt  ch  CURLOPT URL  http   www example com tester phtml    curl setopt  ch  CURLOPT POST  1   curl setopt  ch  CURLOPT POSTFIELDS               postvar1 value1 amp postvar2 value2 amp postvar3 value3        In real life you should use something like     curl setopt  ch  CURLOPT POSTFIELDS               http build query array  postvar1    gt   value1          Receive server response     curl setopt  ch  CURLOPT RETURNTRANSFER  true     server output   curl exec  ch    curl close   ch       Further processing     if   server output     OK           else           gt

User · Answer

Curl Post   Error Handling   Set Headers  thanks to  mantas-d    function curlPost  url   data NULL   headers   NULL         ch   curl init  url       curl setopt  ch  CURLOPT RETURNTRANSFER  true        if  empty  data            curl setopt  ch  CURLOPT POSTFIELDS   data              if   empty  headers             curl setopt  ch  CURLOPT HTTPHEADER   headers               response   curl exec  ch        if  curl error  ch             trigger error  Curl Error     curl error  ch               curl close  ch       return  response      curlPost  google com          username    gt   admin        password    gt   12345

User · Answer

It s can be easily reached with    lt  php   post          username    gt   user1        password    gt   passuser1        gender      gt  1      ch   curl init    curl setopt  ch  CURLOPT URL   http   www domain com    curl setopt  ch  CURLOPT RETURNTRANSFER  true   curl setopt  ch  CURLOPT POSTFIELDS  http build query  post     response   curl exec  ch   var export  response

User · Answer

Here are some boilerplate code for PHP   curl  http   www webbotsspidersscreenscrapers com DSP download php   include in these library will simplify development    lt  php   Initialization include  LIB http php    include  LIB parse php     product array array     product count 0     Download the target  store  web page  target    http   www tellmewhenitchanges com buyair    web page   http get  target                 gt

User · Answer

curlPost  google com          username    gt   admin        password    gt   12345         function curlPost  url   data         ch   curl init  url       curl setopt  ch  CURLOPT RETURNTRANSFER  true       curl setopt  ch  CURLOPT POSTFIELDS   data        response   curl exec  ch        error   curl error  ch       curl close  ch       if   error                   throw new  Exception  error              return  response

User · Answer

If the form is using redirects  authentication  cookies  SSL  https   or anything else other than a totally open script expecting POST variables  you are going to start gnashing your teeth really quick  Take a look at Snoopy  which does exactly what you have in mind while removing the need to set up a lot of the overhead

User · Answer

Examples of sending form and raw data    curlHandler   curl init     curl setopt array  curlHandler        CURLOPT URL   gt   https   postman-echo com post       CURLOPT RETURNTRANSFER   gt  true                  Specify POST method             CURLOPT POST   gt  true                  Specify array of form fields             CURLOPT POSTFIELDS   gt             foo    gt   bar            baz    gt   biz                response   curl exec  curlHandler    curl close  curlHandler    echo  response

User · Answer

A simpler answer IF you are passing information to your own website is to use a SESSION variable   Begin php page with   session start      If at some point there is information you want to generate in PHP and pass to the next page in the session  instead of using a POST variable  assign it to a SESSION variable   Example     SESSION  message    www     GET  school     edu was not found   Please try again     Then on the next page you simply reference this SESSION variable  NOTE  after you use it  be sure you destroy it  so it doesn t persist after it is used   if  isset   SESSION  message      echo   SESSION  message    unset   SESSION  message

User · Answer

A live example of using php curl exec to do an HTTP post   Put this in a file called foobar php    lt  php    ch   curl init       skipper    luxury assault recreational vehicle      fields   array   penguins   gt  skipper   bestpony   gt  rainbowdash       postvars         foreach  fields as  key  gt  value         postvars     key          value     amp           url    http   www google com     curl setopt  ch CURLOPT URL  url     curl setopt  ch CURLOPT POST  1                    0 for a get request   curl setopt  ch CURLOPT POSTFIELDS  postvars     curl setopt  ch CURLOPT RETURNTRANSFER  true     curl setopt  ch CURLOPT CONNECTTIMEOUT  3     curl setopt  ch CURLOPT TIMEOUT  20      response   curl exec  ch     print  curl response is      response    curl close   ch     gt    Then run it with the command php foobar php  it dumps this kind of output to screen    lt  DOCTYPE HTML PUBLIC  -  W3C  DTD HTML 4 01  EN    http   www w3 org TR html4 strict dtd  gt   lt html gt   lt head gt   lt meta http-equiv  Content-Type  content  text html  charset utf-8  gt   lt title gt Title lt  title gt    lt meta http-equiv  Pragma  content  no-cache  gt   lt meta http-equiv  Expires  content  0  gt   lt body gt    A mountain of content     lt  body gt   lt  html gt    So you did a PHP POST to www google com and sent it some data   Had the server been programmed to read in the post variables  it could decide to do something different based upon that

[php] PHP + curl, HTTP POST sample code?

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