Chilkat Examples

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PHP Extension Web API Examples

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(PHP Extension) DynamoDB - DeleteItem

Deletes a single item in a table by primary key. You can perform a conditional delete operation that deletes the item if it exists, or if it has an expected attribute value.

For more information, see https://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_DeleteItem.html

Chilkat PHP Downloads

PHP Extension for Windows, Linux, MacOS,
Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

$rest = new CkRest();

// Implements the following CURL command:

// curl -X POST https://dynamodb.us-west-2.amazonaws.com/ \
//   -H "Accept-Encoding: identity" \
//   -H "Content-Type: application/x-amz-json-1.0" \
//   -H "Authorization: AWS4-HMAC-SHA256 Credential=<Credential>, SignedHeaders=<Headers>, Signature=<Signature>" \
//   -H "X-Amz-Date: <Date>" \
//   -H "X-Amz-Target: DynamoDB_20120810.DeleteItem" \
//   -d '{
//     "TableName": "Thread",
//     "Key": {
//         "ForumName": {
//             "S": "Amazon DynamoDB"
//         },
//         "Subject": {
//             "S": "How do I update multiple items?"
//         }
//     },
//     "ConditionExpression": "attribute_not_exists(Replies)",
//     "ReturnValues": "ALL_OLD"
// }'

// Use the following online tool to generate REST code from a CURL command
// Convert a cURL Command to REST Source Code

$authAws = new CkAuthAws();
$authAws->put_AccessKey('AWS_ACCESS_KEY');
$authAws->put_SecretKey('AWS_SECRET_KEY');
// Don't forget to change the region to your particular region. (Also make the same change in the call to Connect below.)
$authAws->put_Region('us-west-2');
$authAws->put_ServiceName('dynamodb');
// SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
$rest->SetAuthAws($authAws);

// URL: https://dynamodb.us-west-2.amazonaws.com/
$bTls = true;
$port = 443;
$bAutoReconnect = true;
$success = $rest->Connect('dynamodb.us-west-2.amazonaws.com',$port,$bTls,$bAutoReconnect);
if ($success != true) {
    print 'ConnectFailReason: ' . $rest->get_ConnectFailReason() . "\n";
    print $rest->lastErrorText() . "\n";
    exit;
}

// Note: The above code does not need to be repeatedly called for each REST request.
// The rest object can be setup once, and then many requests can be sent.  Chilkat will automatically
// reconnect within a FullRequest* method as needed.  It is only the very first connection that is explicitly
// made via the Connect method.

// Use this online tool to generate code from sample JSON:
// Generate Code to Create JSON

// The following JSON is sent in the request body.

// {
//   "TableName": "Thread",
//   "Key": {
//     "ForumName": {
//       "S": "Amazon DynamoDB"
//     },
//     "Subject": {
//       "S": "How do I update multiple items?"
//     }
//   },
//   "ConditionExpression": "attribute_not_exists(Replies)",
//   "ReturnValues": "ALL_OLD"
// }

$json = new CkJsonObject();
$json->UpdateString('TableName','Thread');
$json->UpdateString('Key.ForumName.S','Amazon DynamoDB');
$json->UpdateString('Key.Subject.S','How do I update multiple items?');
$json->UpdateString('ConditionExpression','attribute_not_exists(Replies)');
$json->UpdateString('ReturnValues','ALL_OLD');

$rest->AddHeader('Content-Type','application/x-amz-json-1.0');
$rest->AddHeader('X-Amz-Target','DynamoDB_20120810.DeleteItem');
$rest->AddHeader('Accept-Encoding','identity');

$sbRequestBody = new CkStringBuilder();
$json->EmitSb($sbRequestBody);
$sbResponseBody = new CkStringBuilder();
$success = $rest->FullRequestSb('POST','/',$sbRequestBody,$sbResponseBody);
if ($success != true) {
    print $rest->lastErrorText() . "\n";
    exit;
}

$respStatusCode = $rest->get_ResponseStatusCode();
print 'response status code = ' . $respStatusCode . "\n";
if ($respStatusCode >= 400) {
    print 'Response Status Code = ' . $respStatusCode . "\n";
    print 'Response Header:' . "\n";
    print $rest->responseHeader() . "\n";
    print 'Response Body:' . "\n";
    print $sbResponseBody->getAsString() . "\n";
    exit;
}

$jsonResponse = new CkJsonObject();
$jsonResponse->LoadSb($sbResponseBody);

$jsonResponse->put_EmitCompact(false);
print $jsonResponse->emit() . "\n";

// Sample JSON response:
// (Sample code for parsing the JSON response is shown below)

// {
//   "Attributes": {
//     "LastPostedBy": {
//       "S": "fred@example.com"
//     },
//     "ForumName": {
//       "S": "Amazon DynamoDB"
//     },
//     "LastPostDateTime": {
//       "S": "201303201023"
//     },
//     "Tags": {
//       "SS": [
//         "Update",
//         "Multiple Items",
//         "HelpMe"
//       ]
//     },
//     "Subject": {
//       "S": "How do I update multiple items?"
//     },
//     "Message": {
//       "S": "I want to update multiple items in a single call. What's the best way to do that?"
//     }
//   }
// }

// Sample code for parsing the JSON response...
// Use the following online tool to generate parsing code from sample JSON:
// Generate Parsing Code from JSON

$AttributesLastPostedByS = $jsonResponse->stringOf('Attributes.LastPostedBy.S');
$AttributesForumNameS = $jsonResponse->stringOf('Attributes.ForumName.S');
$AttributesLastPostDateTimeS = $jsonResponse->stringOf('Attributes.LastPostDateTime.S');
$AttributesSubjectS = $jsonResponse->stringOf('Attributes.Subject.S');
$AttributesMessageS = $jsonResponse->stringOf('Attributes.Message.S');
$i = 0;
$count_i = $jsonResponse->SizeOfArray('Attributes.Tags.SS');
while ($i < $count_i) {
    $jsonResponse->put_I($i);
    $strVal = $jsonResponse->stringOf('Attributes.Tags.SS[i]');
    $i = $i + 1;
}


?>

 

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