Files and Attachments APIs

Copied//Get instance of AttachmentsOperations Class that takes recordId and moduleAPIName as parameter
$attachmentOperations = new AttachmentsOperations($moduleAPIName, $recordId);
//Get instance of ParameterMap Class
$paramInstance = new ParameterMap();
//Possible parameters of Get Attachments Operation
// $paramInstance->add(GetAttachmentsParam::fields(), "id,Modified_Time");
$paramInstance->add(GetAttachmentsParam::page(), 1);
$paramInstance->add(GetAttachmentsParam::perPage(), 100);
//Call getAttachments method that takes ParameterMap instance as parameter
$response = $attachmentOperations->getAttachments($paramInstance);

Copied<?php
class GetAttachments{
    
    public function execute(){
        $curl_pointer = curl_init();
        
        $curl_options = array();
        $url = "https://www.zohoapis.com/crm/v2.1/Leads/3524033000005495065/Attachments?";
        $parameters = array();
        $parameters["fields"]="id";
        $parameters["page"]="1";
        $parameters["per_page"]="10";
        
        foreach ($parameters as $key=>$value){
            $url =$url.$key."=".$value."&";
        }
        $curl_options[CURLOPT_URL] = $url;
        $curl_options[CURLOPT_RETURNTRANSFER] = true;
        $curl_options[CURLOPT_HEADER] = 1;
        $curl_options[CURLOPT_CUSTOMREQUEST] = "GET";
        $headersArray = array();
        $headersArray[]= "If-Modified-Since".":"."2020-10-12T17:59:50+05:30";
        $headersArray[] = "Authorization". ":" . "Zoho-oauthtoken " ."1000.30f3a589XXXXXXXXXXXXXXXXXXX4077.dc5XXXXXXXXXXXXXXXXXXXee9e7c171c";
        $curl_options[CURLOPT_HTTPHEADER]=$headersArray;
        
        curl_setopt_array($curl_pointer, $curl_options);
        
        $result = curl_exec($curl_pointer);
        $responseInfo = curl_getinfo($curl_pointer);
        curl_close($curl_pointer);
        list ($headers, $content) = explode("\r\n\r\n", $result, 2);
        if(strpos($headers," 100 Continue")!==false){
            list( $headers, $content) = explode( "\r\n\r\n", $content , 2);
        }
        $headerArray = (explode("\r\n", $headers, 50));
        $headerMap = array();
        foreach ($headerArray as $key) {
            if (strpos($key, ":") != false) {
                $firstHalf = substr($key, 0, strpos($key, ":"));
                $secondHalf = substr($key, strpos($key, ":") + 1);
                $headerMap[$firstHalf] = trim($secondHalf);
            }
        }
        $jsonResponse = json_decode($content, true);
        if ($jsonResponse == null && $responseInfo['http_code'] != 204) {
            list ($headers, $content) = explode("\r\n\r\n", $content, 2);
            $jsonResponse = json_decode($content, true);
        }
        var_dump($headerMap);
        var_dump($jsonResponse);
        var_dump($responseInfo['http_code']);
        
    }
    
}
(new GetAttachments())->execute();