How to use CURL to send data for Wordpress - php

Question

I would like to send data from one WP site to an other.
I have two plugins the sender ad the reciver.
In the sender side I used the init hook
add_action('init', array($this, 'say_hello') );
....
public function say_hello() {
$data = get_plugin_data( $this->pDIR.'/plugin.php', $markup = false, $translate = false );
$url = $_SERVER['HTTP_HOST'].'/wp-admin/admin-ajax.php';
$fields = array(
'action' => 'Hello_ajax',
'zpm_hello' => '1',
'zpm_plugin_version' => $data['Version'],
'zpm_host' => $_SERVER['HTTP_HOST']
);
foreach($fields as $key=>$value) {
$fields_string .= $key.'='.$value.'&';
}
rtrim($fields_string, '&');
//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, count($fields));
curl_setopt($ch,CURLOPT_POSTFIELDS, $fields_string);
//execute post
$result = curl_exec($ch);
var_dump($result);
//close connection
curl_close($ch);
}
The variables are fine the url is correct I printed out.
On the reciver side I registered the admin ajax
add_action('wp_ajax_Hello_ajax', array($this, 'zpm_api_hello'));
add_action('wp_ajax_nopriv_Hello_ajax', array($this, 'zpm_api_hello'));
public function zpm_api_hello() {
$response['success'] = false;
$response['response'] = "";
$error = false;
$hello = $_POST['zpm_hello'];
$plugin_version = $_POST['zpm_plugin_version'];
$plugin_host = $_POST['zpm_host'];
if(!isset($hello)) {
$error = true;
$response['response'] .= "Ello >> Auth ERROR - CODE - 01 ";
}
if(!isset($plugin_version)) {
$error = true;
$response['response'] .= "Ello >> Plugin Version error - CODE - 02 ";
}
if(!isset($plugin_host)) {
$error = true;
$response['response'] .= "Ello >> Plugin host error - CODE - 03 ";
}
if(!$error) {
$response['success'] = true;
$response['response'] .= "Ello >> Auth OK ";
}
echo json_encode($response);
die();
}
So the code is here.
My problem is when I try to load the sender site it is just loading and loading for ever and I doesn't get back the result. Could you tell me what could be the problem with this method? Thanks all of your answers!

Answer 1

you might want to use this example to build your PHP request, if you send me the POST body, headers and url parameters I will even build it for you:
<?php
$curl = curl_init();
curl_setopt_array($curl, array(
CURLOPT_URL => "http://example.com//wp-admin/admin-ajax.php",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => "blakey=blaval",
CURLOPT_HTTPHEADER => array(
"action: Hello_ajax",
"cache-control: no-cache",
"content-type: application/x-www-form-urlencoded",
"postman-token: fd5bcc0b-f46d-0cf8-a5cf-dc83bfe7dbec",
"zpm_hello: 1"
),
));
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}