How to pass GET parameters in curl PHP - php

Question

I am new to PHP development. I am working on CURL to call my WEB API. As a newbie I found very hard to understand things.
How my API is working
API_URL is http://localhost:14909/api/meters/GetByMsn/002999000077/2017-10-11T12:16:20
It takes a meter serial number and a data time and gives the response by authorizing the URL. The response I get is
{
"data": {
"Response": "No"
}
}
What I want to do
Now In PHP I am using CURL to make the request. The request is simple as it takes the current selected meter serial number and a current date time also it should take authorization key.
What I have done till now
Below is the code so far i have done
if( isset($_REQUEST['selected_meters']))
{
$m = MetersInventoryStore::findOne($_REQUEST['selected_meters']);
$msn = $m->meter_serial; // current selected meter serial number is saved
$date_time = str_replace(' ','T',date('Y-m-d H:i:s')); // current date time
$api_url = 'http://116.xx.xx.xx:xxxx/api/meters/GetByMsn/'; // my base URL
$curl = curl_init($api_url);
curl_setopt($curl,CURLOPT_RETURNTRANSFER, CURLOPT_HTTPHEADER, array('Authorization: MY_KEY')); // setting the authorization key in header.
exit();
}
Now I want to send the meter serial number and date time parameters. For this I have searched many articles but all I found a way to pass parameters as query and related link.
One method I am thinking of is passing parameters direct to the URL Like:
$api_url = 'http://116.xx.xx.xx:xxxx/api/meters/GetByMsn/[$msn]/[$date_time]';
OR
$api_url = 'http://116.xx.xx.xx:xxxx/api/meters/GetByMsn/' + $msn + '/'+$date_time;
But I don't know will it works or not
Any help would be highly appreciated.

Answer 1

Try this out and see if it works:
$api_url = 'http://116.xx.xx.xx:xxxx/api/meters/GetByMsn/${msn}/${date_time}';
or
$api_url = 'http://116.xx.xx.xx:xxxx/api/meters/GetByMsn/{$msn}/{$date_time}';

Answer 2

So after a lot of searching I manage to get a response. Concatenate both of the parameters in the URL and changing the curl_setopt.
Changes:
From
$api_url = 'http://116.xx.xx.xx:xxxx/api/meters/GetByMsn/'; // my base URL
To
$api_url = 'http://116.xx.xx.xx:xxxx/api/meters/GetByMsn/'.$msn . '/' . $date_time; // my base URL
And
curl_setopt($curl,CURLOPT_RETURNTRANSFER, CURLOPT_HTTPHEADER, array('Authorization: MY_KEY')); // setting the authorization key in header.
To
curl_setopt($curl CURLOPT_HTTPHEADER, array('Authorization: MY_KEY')); // Removed the CURLOPT_RETURNTRANSFER
And then
$curl_response = curl_exec($curl);
print_r($curl_response);
/* print_r($msn);
echo $date_time;*/
//echo date('Y-m-d H:i:s');
exit();