如何在php中拆分冗长的URI

Question

I am sending bulk SMS with php API through a SMS gatway like this:

http://smsserviceprovider.com/sendsms.php?apikey=xxxx&text=testsms&mobiles=11111,22222,33333,44444,55555,66666.... 

(upto 1800 mobile numbers which is stored in mysqldb). But the service provider only allow me to send only 50 mobiles at once. So I have to send SMS in multiple times. How can I split the parametermobiles like this

http://smsserviceprovider.com/sendsms.php?apikey=xxxx&text=testsms&mobiles=11111,22222
http://smsserviceprovider.com/sendsms.php?apikey=xxxx&text=testsms&mobiles=33333,44444
http://smsserviceprovider.com/sendsms.php?apikey=xxxx&text=testsms&mobiles=55555,66666....

My current function in php is

function send_sms($message, $numbers) {
        $apikey="xxxxx";
        $message=urlencode($message);
        $var = "apikey=".$apikey."&text=".$message."&mobiles=".$numbers";
        $curl=curl_init('http://smsserviceprovider.com/sendsms.php?'.$var);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER,true);
        $response=curl_exec($curl);
        curl_close($curl);
        return $response; 
}

Answer 1

The trick is to build an array from your comma-separated list of phone numbers, using something like explode() and then group them into chunks of 50 using something like array_chunk(). However, this does mean your function now has to make multiple requests instead of one due to this constraint. So in the following example I return an array of responses instead of just a single response.

function send_sms($message, $numbers) {
    $responses = [];
    $params = [
        'text'    => $message,
        'mobiles' => '',
        'apikey'  => 'xxxxx',
    ];

    $numbers = explode(',', $numbers);

    foreach(array_chunk($numbers, 50) as $numlist) {
        $params["mobiles"] = $numlist;
        $queryString = http_build_query($params);
        $responses[] = file_get_contents($url . $queryString);
    }
    return $responses;
}