php curl根据记录总数来从url获取数据

I am connecting to rest api which gives me json data with only 50 results at a time and i save the result in a variable ,but i want to retrieve 20000 records and i would like to know how i can build dynamic url to get all the data and save that in a variable.

Below is my current code

    $url = "https://org.atlassian.net/rest/api/2/search?jql=project=PS+order+by+key&startAt=0";
    $ch = curl_init();

    $headers = array('Accept: application/json','Content-Type: application/json');


    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

    curl_setopt($ch, CURLOPT_VERBOSE, 1);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "GET");
    curl_setopt($ch, CURLOPT_URL, $url);
    $result = curl_exec($ch);
    $ch_error = curl_error($ch);

            if ($ch_error) {
            echo "cURL Error: $ch_error";
            } else {
            $json = json_decode($result, true);}

In my url i have parameter to specify from which number i can return records like first request will be startAt=0 and second would be startAt=51 and thits would be startAt=101 or can i use a formula like x = total no of records/50 and then run curl x times and save all the result in variable or save all the json array and then merge it.Request you to help me on the same.

Thanks in Advance

There is a query parameter called maxResults which defaults to 50. You can specify a higher number.

maxResults (int): the maximum number of issues to return (defaults to 50). The maximum allowable value is dictated by the JIRA property 'jira.search.views.default.max'. If you specify a value that is higher than this number, your search results will be truncated.

https://docs.atlassian.com/jira/REST/cloud/#api/2/search-search

I created a loop for this and resolved the problem.