PHP send and receive data curl or json - php

Question

I'm trying to make two file talk to each other.
'output_file.php' to send data from domain 'a' to input_file located on domain 'b'.
Data from output file will later be send to crm via api.
I'm stuck as I don't know what am I doing wrong, what should I change in these files?
Here is output_file.php:
<?php
//send cURL
$curl = 'https://domain_name/input.php';
$fields = array(
'name' => urlencode($_POST['name']),
'email' => urlencode($_POST['email']),
'tel' => urlencode($_POST['tel']),
);
//var_dump($fields);
foreach($fields as $key=>$value) { $fields_string .= $key.'='.$value.'&'; }
rtrim($fields_string, '&');
//var_dump($fields_string);
$ch = curl_init();
curl_setopt($ch,CURLOPT_URL, $curl);
curl_setopt($ch,CURLOPT_POST, count($fields));
curl_setopt($ch,CURLOPT_POSTFIELDS, $fields_string);
$result = curl_exec($ch);
//var_dump($result);
curl_close($ch);*/
?>
Here is input_file.php:
// main data about the person. person_id is added later dynamically - PERSON DATA
$person = array(
'name' => 'name from output_file.php',
'email' => 'email from output_file.php',
'phone' => 'tel from output_file.php'
);

Answer 1

You can use below snippet for this. It should be work.
Ps. Please delete POST functions from your output file, it's uncesseray and useless.
$person = array(
'name' => $_REQUEST['name'],
'email' => $_REQUEST['email'],
'phone' => $_REQUEST['phone'],
);
Best,

Answer 2

As you do use POST to send your data, you will need to capture the POST on the target site. As you do use $_POST variables, you may want to have a look into security, to make sure the data recieved can not harm you:
PHP $_GET security, $_POST security best practice
Your Outfile:
<?php
$curl = 'https://domain_name/input.php';
$fields = array(
'name' => urlencode($_POST['name']),
'email' => urlencode($_POST['email']),
'tel' => urlencode($_POST['tel']),
);
// here you do prepare your POST data
foreach($fields as $key=>$value) { $fields_string .= $key.'='.$value.'&'; }
rtrim($fields_string, '&');
$ch = curl_init();
curl_setopt($ch,CURLOPT_URL, $curl);
// here you define that your data will be sent via POST
curl_setopt($ch,CURLOPT_POST, count($fields));
curl_setopt($ch,CURLOPT_POSTFIELDS, $fields_string);
// this curlopt ensures the output of your destination is captured
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$result = curl_exec($ch);
curl_close($ch);
?>
Your Input/Destination file:
<?php
// user $_POST to populate your array
$person = array(
'name' => $_POST['name'],
'email' => $_POST['email'],
'phone' => $_POST['tel']
);
// see the result
var_dump($person);
?>