How to send mail weekly once WordPress backup taken or not?

Finally I got the answer

First install the AWS S3 package refer this 'https://docs.aws.amazon.com/sdk-for-php/v3/developer-guide/s3-examples-creating-buckets.html' Then below mentioned code create index.php file then call in browser working good

When you want to automatically run index.php file use cron

require 'vendor/autoload.php';use Aws\S3\S3Client;use Aws\Exception\AwsException;$bucketData = '{   "bucket":{      "1":{         "name":"bucketname-1",         "backup":"backups/"      },      "2":{         "name":"bucketname-2",         "backup":"backups/"      }      },   "uncheck":[      "menardsimages"    ]}';//multile-bucket-having-mentioned-except'uncheck'$bucketData = json_decode($bucketData);/** * List your Amazon S3 buckets. * * This code expects that you have AWS credentials set up per: * https://docs.aws.amazon.com/sdk-for-php/v3/developer-guide/guide_credentials.html */$key = 'xxxxxxxxx';$secret = 'yyyyyyyy';//Create a S3Client$s3Client = new S3Client([    'region' => 'us-west-2',    'version' => 'latest',    'credentials' => [        'key' => $key,        'secret' => $secret,    ]]);function recent_backup_verify($objects){    $tendays_bf_today = date('Y-m-d',(strtotime ( '-7 day' , strtotime ( date("Y-m-d")) ) ));     foreach ($objects as $object) {       $created_date = $object['LastModified']->format('Y-m-d');       if($created_date > $tendays_bf_today){           return $created_date;       }    }    return false;}function searchForName($name, $array) {   foreach ($array as $key => $val) {       if ($val->name === $name) {           return $val->backup;       }   }   return null;}$buckets = $s3Client->listBuckets();//print_r($created_bucketlist);$backup_array = array();foreach ($buckets['Buckets'] as $bucket) {    //files-listing-insideofthe-bucket    if(!in_array($bucket['Name'], $bucketData->uncheck)){        $objects = $s3Client->getIterator('ListObjects', array(            "Bucket" => $bucket['Name'],            "Prefix" => searchForName($bucket['Name'], $bucketData->bucket) //must have the trailing forward slash "/"        ));        $getbackup_result = recent_backup_verify($objects);        if($getbackup_result != false){            $backup_array[$bucket['Name']]['status'] = 'Taken';            $backup_array[$bucket['Name']]['date'] = $getbackup_result;        }else{            $backup_array[$bucket['Name']]['status'] = 'Not Taken';            $backup_array[$bucket['Name']]['date'] = '-';        }    }}sendgrid_form($backup_array);function sendgrid_form($backup_array){    $msg = '<table border="1" cellpadding="5" cellspacing="0" width="500px" style="border-color:#ddd;">';    $msg .= '<tr bgcolor="#555" style="color:#fff;">';    $msg .= '<th>S.No</th><th>Site Name</th><th width="100px">Backup Date</th><th width="100px">Backup Status</th>';    $msg .= '</tr>';    $s_no = 1;    foreach($backup_array as $site=>$val){        if($val['status'] == 'Taken'){$color = 'green';}else{$color='red';}        $msg .= '<tr>';        $msg .= '<td align="center">'.$s_no.'</td><td>'.$site.'</td><td align="center" >'.$val['date'].'</td><td align="center" style="color:'.$color.'">'.$val['status'].'</td>';        $msg .= '</tr>';        $s_no++;    }    $msg .= '</table>';    $message_html = "<hr width='20%' align='left'>                    <img src='logo.png' width='100px'>                    <hr width='20%' align='left'>                    <h3>Hi Team,</h3>                    <p>This is the list that has the every week backup status of our websites/applications that received in our AWS S3. If the 'Backup Status' is 'Not Taken' please check with the script/plugin immediately.</p>                    ".$msg."                    <p>Thank You</p>";    $to = 'reciever@example.com';    $json_string = array(        'to' => array($to),        'category' => 's3_backup'    );    $params = array(    'api_user' => 'xxxxx',    'api_key' => 'yyyy',    'x-smtpapi' => json_encode($json_string),    'to' => $to,    'subject' => 'Backup S3 Report!',    'html' => $message_html,    'from' => 'info@example.com',    );    $request = 'https://api.sendgrid.com/api/mail.send.json';    $session = curl_init($request);    curl_setopt ($session, CURLOPT_POST, true);    curl_setopt ($session, CURLOPT_POSTFIELDS, $params);    curl_setopt($session, CURLOPT_HEADER, false);    curl_setopt($session, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1_2);    curl_setopt($session, CURLOPT_RETURNTRANSFER, true);    $response = curl_exec($session);    curl_close($session);    $temp = json_decode($response);    if($temp->message == 'success'){        $data['success'] = "Email Send Successfully!";    }else{        $data['success'] = "Email Send Failed!";    }    echo json_encode($data);}