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.example.com
I expect the cURL to return a response like result=OK. Are there any examples?
<?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&postvar2=value2&postvar3=value3");
// In real life you should use something like:
// curl_setopt($ch, CURLOPT_POSTFIELDS,
// http_build_query(array('postvar1' => 'value1')));
// Receive server response ...
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$server_output = curl_exec($ch);
curl_close($ch);
// Further processing ...
if ($server_output == "OK") { ... } else { ... }
?>
Procedural
// set post fields
$post = [
'username' => 'user1',
'password' => 'passuser1',
'gender' => 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
<?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->url = $url;
$this->options = $options;
}
/**
* Get the response
* #return string
* #throws \RuntimeException On cURL error
*/
public function __invoke(array $post)
{
$ch = \curl_init($this->url);
foreach ($this->options as $key => $val) {
\curl_setopt($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' => 'user1',
'password' => 'passuser1',
'gender' => 1,
]);
} catch (\RuntimeException $ex) {
// catch errors
die(sprintf('Http error %s with code %d', $ex->getMessage(), $ex->getCode()));
}
Side note here: it would be best to create some kind of interface called AdapterInterface for example with getResponse() method and let the class above implement it. Then you can always swap this implementation with another adapter of your like, without any side effects to your application.
Using HTTPS / encrypting traffic
Usually there's a problem with cURL in PHP under the Windows operating system. While trying to connect to a https protected endpoint, you will get an error telling you that certificate verify failed.
What most people do here is to tell the cURL library to simply ignore certificate errors and continue (curl_setopt($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.
A live example of using php curl_exec to do an HTTP post:
Put this in a file called foobar.php:
<?php
$ch = curl_init();
$skipper = "luxury assault recreational vehicle";
$fields = array( 'penguins'=>$skipper, 'bestpony'=>'rainbowdash');
$postvars = '';
foreach($fields as $key=>$value) {
$postvars .= $key . "=" . $value . "&";
}
$url = "http://www.google.com";
curl_setopt($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);
?>
Then run it with the command php foobar.php, it dumps this kind of output to screen:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Title</title>
<meta http-equiv="Pragma" content="no-cache">
<meta http-equiv="Expires" content="0">
<body>
A mountain of content...
</body>
</html>
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.
It's can be easily reached with:
<?php
$post = [
'username' => 'user1',
'password' => 'passuser1',
'gender' => 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);
1.Step by step
Initialize the cURL session:
$url = "www.domain.com";
$ch = curl_init($url);
If your request has headers like bearer token or defining JSON contents you have to set HTTPHEADER options to cURL:
$token = "generated token code";
curl_setopt(
$ch,
CURLOPT_HTTPHEADER,
array(
'Content-Type: application/json', // for define content type that is json
'bearer: '.$token, // send token in header request
'Content-length: 100' // content length for example 100 characters (can add by strlen($fields))
)
);
If you want to include the header in the output set CURLOPT_HEADER to true:
curl_setopt($ch, CURLOPT_HEADER, false);
Set RETURNTRANSFER option to true to return the transfer as a string instead of outputting it directly:
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
To check the existence of a common name in the SSL peer certificate can be set to 0(to not check the names), 1(not supported in cURL 7.28.1), 2(default value and for production mode):
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
For posting fields as an array by cURL:
$fields = array(
"username" => "user1",
"password" => "passuser1",
"gender" => 1
);
curl_setopt($ch, CURLOPT_POSTFIELDS, $fields);
Execute cURL and return the string. depending on your resource this returns output like result=OK:
$result = curl_exec($ch);
Close cURL resource, and free up system resources:
curl_close($ch);
2.Use as a class
The whole call_cURL class that can be extended:
class class_name_for_call_cURL {
protected function getUrl() {
return "www.domain.com";
}
public function call_cURL() {
$token = "generated token code";
$fields = array(
"username" => "user1",
"password" => "passuser1",
"gender" => 1
);
$url = $this->getUrl();
$output = $this->_execute($fields, $url, $token);
// if you want to get json data
// $output = json_decode($output);
if ($output == "OK") {
return true;
} else {
return false;
}
}
private function _execute($postData, $url, $token) {
// for sending data as json type
$fields = json_encode($postData);
$ch = curl_init($url);
curl_setopt(
$ch,
CURLOPT_HTTPHEADER,
array(
'Content-Type: application/json', // if the content type is json
'bearer: '.$token // if you need token in header
)
);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($ch, CURLOPT_POSTFIELDS, $fields);
$result = curl_exec($ch);
curl_close($ch);
return $result;
}
}
Using the class and call cURL:
$class = new class_name_for_call_cURL();
var_dump($class->call_cURL()); // output is true/false
3.One function
A function for using anywhere that needed:
function get_cURL() {
$url = "www.domain.com";
$token = "generated token code";
$postData = array(
"username" => "user1",
"password" => "passuser1",
"gender" => 1
);
// for sending data as json type
$fields = json_encode($postData);
$ch = curl_init($url);
curl_setopt(
$ch,
CURLOPT_HTTPHEADER,
array(
'Content-Type: application/json', // if the content type is json
'bearer: '.$token // if you need token in header
)
);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($ch, CURLOPT_POSTFIELDS, $fields);
$result = curl_exec($ch);
curl_close($ch);
return $result;
}
This function is usable just by:
var_dump(get_cURL());
Curl Post + Error Handling + Set Headers [thanks to #mantas-d]:
function curlPost($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 $response;
}
curlPost('google.com', [
'username' => 'admin',
'password' => '12345',
]);
curlPost('google.com', [
'username' => 'admin',
'password' => '12345',
]);
function curlPost($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;
}
I'm surprised nobody suggested file_get_contents:
$url = "http://www.example.com";
$parameters = array('username' => 'user1', 'password' => 'passuser1', 'gender' => '1');
$options = array('http' => array(
'header' => 'Content-Type: application/x-www-form-urlencoded\r\n',
'method' => 'POST',
'content' => http_build_query($parameters)
));
$context = stream_context_create($options);
$result = file_get_contents($url, false, $context);
it's simple, it works; I use it in an environment where I control the code at both ends.
even better, use json_decode (and set up your code to return JSON)
$result = json_decode(file_get_contents($url, false, $context), TRUE);
this approach invokes curl behind the scenes, but you don't jump through as many hoops.
Answer refined from this original answer elsewhere on Stack Overflow:
PHP sending variables to file_get_contents()
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.
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']);}
Here are some boilerplate code for PHP + curl
http://www.webbotsspidersscreenscrapers.com/DSP_download.php
include in these library will simplify development
<?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, "");
...
?>
Examples of sending form and raw data:
$curlHandler = curl_init();
curl_setopt_array($curlHandler, [
CURLOPT_URL => 'https://postman-echo.com/post',
CURLOPT_RETURNTRANSFER => true,
/**
* Specify POST method
*/
CURLOPT_POST => true,
/**
* Specify array of form fields
*/
CURLOPT_POSTFIELDS => [
'foo' => 'bar',
'baz' => 'biz',
],
]);
$response = curl_exec($curlHandler);
curl_close($curlHandler);
echo($response);
If you try to login on site with cookies.
This code:
if ($server_output == "OK") { ... } else { ... }
It May not works if you try to login, because many sites return status 200, but the post is not successful.
The easy way to check if the login post is successful is to check if it setting cookies again. If in output have a Set-Cookies string, this means the posts are not successful and it starts a new session.
Also, the post can be successful, but the status can redirect instead of 200.
To be sure the post is successful try this:
Follow location after the post, so it will go to the page where the post does redirect to:
curl_setopt($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'; }
Easiest is to send data as application/json. This will take an array as input and properly encodes it into a json string:
$data = array(
'field1' => 'field1value',
'field2' => 'field2value',
)
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
'Content-Type:application/json',
));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$resultStr = curl_exec($ch);
return json_decode($resultStr, true);
I am android developer and have some knowledge in php. I need to make post request in php. I found two ways to achieve it.
1. Using CURL.
$url = "your url";
$content = json_encode("your data to be sent");
$curl = curl_init($url);
curl_setopt($curl, CURLOPT_HEADER, false);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HTTPHEADER,
array("Content-type: application/json"));
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_POSTFIELDS, $content);
$json_response = curl_exec($curl);
$status = curl_getinfo($curl, CURLINFO_HTTP_CODE);
if ( $status != 201 ) {
die("Error: call to URL $url failed with status $status, response $json_response, curl_error " . curl_error($curl) . ", curl_errno " . curl_errno($curl));
}
curl_close($curl);
$response = json_decode($json_response, true);
2. Using Simple Post(file_get_contents).
$options = array(
'http' => array(
'method' => 'POST',
'content' => json_encode( $data ),
'header'=> "Content-Type: application/json\r\n" .
"Accept: application/json\r\n"
)
);
$context = stream_context_create( $options );
$result = file_get_contents( $url, false, $context );
$response = json_decode( $result );
But, I just want to know which is better and efficient way to do that and why?
Is there any server/browser or any platform related issue any of them?
Or is there any other technique to achieve that?
Suggestions are welcome.Thanks
Best way to achieve is always
Using CURL.
as this is fastest & more reliable..
If you are just sending a JSON reply from a PHP script launched by a call from your Android JAVA code then the simplest and probably the fasted is just to echo the JSON string from your PHP script.
i.e.
<?php
// read the $_POST inputs from Android call
// Process whatever building an array
// or better still an object containing all
// data and statuses you want to return to the
// android JAVA code
echo json_encode($theObjectOrArray);
exit;
This way it is all part of the same post/responce. If you get CURL involved you are breaking the simple life cycle.
I'm the using MailChimp 2.0 api and trying to post a lists/subscribe call using php. The call is returning an error "You must specify a apikey value".
Here's the code that makes the post:
function json_post ($url, $params)
{
print '<p>url = ' . $url . '</p>';
$data = json_encode ($params);
print '<p>data = ' . $data . '</p>';
$handle = curl_init ($url);
curl_setopt ($handle, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt ($handle, CURLOPT_POST_FIELDS, $data);
curl_setopt ($handle, CURLOPT_RETURNTRANSFER, true);
curl_setopt ($handle, CURLOPT_HTTPHEADER, array ('Content-Type: application/json',
'Content-Length: ' . strlen($data_string)));
$result = curl_exec ($handle);
print '<p>curl_error: ' . curl_errno ($handle) . '</p>';
return $result;
}
The print statements show:
url = https://us10.api.mailchimp.com/2.0/lists/subscribe.json
data = {"apikey":"...","id":"...","email":{"email":"test1#abc.com"},"merge_vars":{"groupings":{"name":"test"}}}
curl_error: 0
{"status":"error","code":-100,"name":"ValidationError","error":"You must specify a apikey value"}
I presume there's something wrong with the syntax. The api key is cut & pasted from my mailchimp account page. I've tried it with and without the -us10 suffix. Any ideas?
To subscribe:
$email='';
$apikey='';
$listId='';
$data = array(
'email_address'=>$email,
'apikey'=>$apikey,
'merge_vars' => array(),
'id' => $listId,
'double_optin' => false,
'update_existing' => true,
'replace_interests' => false,
'send_welcome' => false,
'email_type' => 'html'
);
$submit_url = "http://us6.api.mailchimp.com/1.3/?method=listSubscribe";
$payload = json_encode($data);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $submit_url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, urlencode($payload));
$result = curl_exec($ch);
curl_close ($ch);
$data = json_decode($result);
if (isset($data->error) and $data->error){
//Error
} else {
//Ok
}
Cases where you get "API Key Missing" but the API Key is definitely there usually comes from JSON Syntax errors, which MailChimp doesn't catch specifically. You'll want to make sure that JSON isn't getting double-encoded or anything like that.
In this case, it is probably CURLOPT_POST_FIELDS -- the actual PHP Constant you're looking for is CURLOPT_POSTFIELDS.
You should use Guzzle or another HTTP library to ensure you're not double-encoding your JSON or otherwise getting tripped up by the Curl library's verbosity.
I am trying to send data to device with GCM but getting curly braces in output(as below image). I'm new to php and I wonder how to fix this issue. Here is the part of PHP server code :
public function send_notification($registatoin_ids, $message, $title) {
// include config
include_once './config.php';
$url = 'https://android.googleapis.com/gcm/send';
$data = array("title" => $title, "message" => $message);
$fields = array(
'registration_ids' => $registatoin_ids,
'data' => $data
);
$headers = array(
'Authorization: key=' . GOOGLE_API_KEY,
'Content-Type: application/json'
);
// Open connection
$ch = curl_init();
// Set the url, number of POST vars, POST data
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
// Disabling SSL Certificate support temporarly
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));
// Execute post
$result = curl_exec($ch);
if ($result === FALSE) {
die('Curl failed: ' . curl_error($ch));
}
// Close connection
curl_close($ch);
echo $result;
}
/////////
I changed the send_message.php like this and it fixed.
if (isset($_GET["regId"]) && isset($_GET["message"]) && isset($_GET["title"])) {
$regId = $_GET["regId"];
$messagem = $_GET["message"];
$titlem = $_GET["title"];
include_once './GCM.php';
$gcm = new GCM();
$registatoin_ids = array($regId);
$message = array("message" => $messagem);
$title = array($titlem);
$result = $gcm->send_notification($registatoin_ids, $messagem, $titlem);
echo $result;`
}
EDIT: sorry, with JSON GCM payload data should be an assoc array. Mixed up with an older flavor of the protocol. That said, what is your intent on the Android side like?
EDIT: dump the whole extra bundle.
Bundle b = intent.getExtras();
for(String k : b.keySet())
Log.d("tag", k + "=" + b.get(k).toString());
edited:
ok, I think your problem is you're posting the value {.....} with no key. it's like saying
http://..... com?{myjson:"stuff"}
I haven't reviewed the api, but it seems it should be something like post "data=".json_encode($fields);
I recently got an email from Microsoft saying that the Bing API was moving to the Windows Azure Marketplace. It seemed that the main difference between the new request was the authentication.
After reading many posts on forums, I found this:
$accountKey = '#########';
$api = 'https://api.datamarket.azure.com/Bing/Search/Web?$format=json&$top=8&Query=';
$context = stream_context_create(array(
'http' => array(
'request_fulluri' => true,
'header' => "Authorization: Basic " . base64_encode($accountKey . ":" . $accountKey)
)
));
$request = $api.'%27'.$q.'%27&$skip='.$start;
$result = file_get_contents($request, 0, $context);
However, I still get the error "The authorization type you provided is not supported. Only Basic and OAuth are supported".
Does anyone know how I can fix this. I have also tried cURL and that doesn't work.
Thanks to anyone who can find me a solution.
I think the URLs have changed. This code works. Note the URL in the first line:
$api = 'https://api.datamarket.azure.com/Data.ashx/Bing/Search/v1/Web?$format=json&$top=8&Query=';
$context = stream_context_create(array(
'http' => array(
'request_fulluri' => true,
'header' => "Authorization: Basic " . base64_encode($accountKey . ":" . $accountKey)
)
));
$q = 'test';
$request = $api.'%27'.$q.'%27';
echo file_get_contents($request, 0, $context);
Here is working example of Search API just replace your access key with "XXXX". Even i wasted quite a few hours to get it work using cURL but it was failing cause of "CURLOPT_SSL_VERIFYPEER" on local :(
$url = 'https://api.datamarket.azure.com/Bing/Search/Web?Query=%27xbox%27';
$process = curl_init($url);
curl_setopt($process, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
curl_setopt($process, CURLOPT_USERPWD, "username:XXXX");
curl_setopt($process, CURLOPT_TIMEOUT, 30);
curl_setopt($process, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($process, CURLOPT_SSL_VERIFYPEER, false);
$response = curl_exec($process);
# Deliver
return $response;
# Have a great day!
curl_close($process);
I met the same problem, now fixed, the root_url has changed, it is now something like:
https://user:yourAccountKey#api.datamarket.azure.com/Bing/SearchWeb/Web?Query=%27leo%20fender%27&Market=%27en-US%27&$top=50&$format=JSON">
I had the same problem which occured when I deployed a website to a new server. I think my hosting company disabled some functionality with file_get_contents to external links.
$url = 'https://api.datamarket.azure.com/Data.ashx/Bing/MicrosoftTranslator/v1/Translate?Text=%27'.urlencode($text).'%27&To=%27' . $to . '%27&From=%27' . $from . '%27&$top=100&$format=json';
$accountKey = 'APIKEY';
$handle = curl_init ($url);
if ($handle) {
$curlOptArr = array(
CURLOPT_HTTPAUTH => CURLAUTH_BASIC,
CURLOPT_USERPWD => $accountKey . ':' . $accountKey,
CURLOPT_RETURNTRANSFER => TRUE
);
curl_setopt_array($handle, $curlOptArr);
$response = curl_exec($handle);
$data = json_decode($response,true);
if (is_array($data)) {
if (isset($data['d']['results'][0]['Text'])) {
print $data['d']['results'][0]['Text'];
} else {
print false;
}
} else {
print $text;
}
$errRet = curl_error($handle);
curl_close($handle);
}
This one works for me when using cURL.