<?php

/**
 * Get submission data
 *
 * http://api.jotform.com/docs/#submission-id
 */
require '../../vendor/autoload.php';
$key = 'your-api-key-from-jotform';
$client = new JotForm\JotFormClient();
$client->setAPIKey($key);
$submission = new JotForm\Resource\Submission($client);
try {
    $submissionId = 'submission-ID-here';
    $data = $submission->getSubmissionData($submissionId);
    print_r($data);
} catch (\JotForm\Exception\ClientException $e) {
    echo $e->getMessage() . "\n";
}
<?php

/**
 * Delete submission data
 *
 * http://api.jotform.com/docs/#delete-submission-id
 */
require '../../vendor/autoload.php';
$key = 'your-api-key-from-jotform';
$client = new JotForm\JotFormClient();
$client->setAPIKey($key);
$submission = new JotForm\Resource\Submission($client);
try {
    $submissionId = 'submission-ID-here';
    $data = $submission->deleteSubmissionData($submissionId);
    print_r($data);
} catch (\JotForm\Exception\ClientException $e) {
    echo $e->getMessage() . "\n";
}
<?php

/**
 * Update submission data
 *
 * http://api.jotform.com/docs/#post-submission-id
 */
require '../../vendor/autoload.php';
$key = 'your-api-key-from-jotform';
$client = new JotForm\JotFormClient();
$client->setAPIKey($key);
$submission = new JotForm\Resource\Submission($client);
try {
    $submissionId = 'submission-ID-here';
    $submissionUpdate = ['submission' => ['2' => 'Update submission entry', '3' => '*****@*****.**', '4' => ['Foo-update', 'Bar-update']]];
    $response = $submission->updateSubmissionData($submissionId, $submissionUpdate);
    print_r($response);
} catch (\JotForm\Exception\ClientException $e) {
    echo $e->getMessage() . "\n";
}