Basic PHP NetSuite OAuth1.0 (SHA256) authentication to call RESTlet script.

NetSuite_TBA_OAuth.php

<?php
/**
 * @Author        w3bguy
 * @Created       2021-09-08
 *  
 * Description:
 *  Basic PHP NetSuite OAuth1.0 (SHA256) authentication to call RESTlet script.
 *
 * @modifications
 *  Date          Author    Version     Remarks
 *  2021-09-08    w3bguy    v21.9.8-1   Created
 *
 */

if(!defined('NETSUITE_DEPLOYMENT_URL')){
  define("NETSUITE_DEPLOYMENT_URL",'https://[NS Account Number].restlets.api.netsuite.com/app/site/hosting/restlet.nl?script=[NS Script ID]&deploy=[NS Deploy ID]');
}
if(!defined('NETSUITE_URL')){
  define("NETSUITE_URL",'https://[NS Account Number].restlets.api.netsuite.com');
}
if(!defined('NETSUITE_REST_URL')){
  define("NETSUITE_REST_URL",'https://[NS Account Number].restlets.api.netsuite.com/app/site/hosting/restlet.nl');
}
if(!defined('NETSUITE_SCRIPT_ID')){
  define("NETSUITE_SCRIPT_ID",'[NS Script ID]');
}
if(!defined('NETSUITE_DEPLOY_ID')){
  define("NETSUITE_DEPLOY_ID",'[NS Deploy ID]');
}
if(!defined('NETSUITE_ACCOUNT')){
  define("NETSUITE_ACCOUNT",'[NS Account Number]');
}
if(!defined('NETSUITE_CONSUMER_KEY')){
  define("NETSUITE_CONSUMER_KEY",'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx');
}
if(!defined('NETSUITE_CONSUMER_SECRET')){
  define("NETSUITE_CONSUMER_SECRET",'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx');
}
if(!defined('NETSUITE_TOKEN_ID')){
  define("NETSUITE_TOKEN_ID",'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx');
}
if(!defined('NETSUITE_TOKEN_SECRET')){
  define("NETSUITE_TOKEN_SECRET",'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx');
}

$payload='';

$encoded=json_encode($payload);
$data_string=$encoded;
$oauth_nonce=md5(mt_rand());
$oauth_timestamp=time();
$oauth_signature_method='HMAC-SHA256';
$oauth_version="1.0";
  
$base_string=
  "POST&".urlencode(NETSUITE_REST_URL)."&".
  urlencode(
    "deploy=".NETSUITE_DEPLOY_ID
    ."&oauth_consumer_key=".NETSUITE_CONSUMER_KEY
    ."&oauth_nonce=".$oauth_nonce
    ."&oauth_signature_method=".$oauth_signature_method
    ."&oauth_timestamp=".$oauth_timestamp
    ."&oauth_token=".NETSUITE_TOKEN_ID
    ."&oauth_version=".$oauth_version
    ."&script=".NETSUITE_SCRIPT_ID
  );

$key=rawurlencode(NETSUITE_CONSUMER_SECRET).'&'.rawurlencode(NETSUITE_TOKEN_SECRET);
$signature=base64_encode(hash_hmac("sha256",$base_string,$key,true));
$auth_header='OAuth '
  .'realm="'.rawurlencode(NETSUITE_ACCOUNT).'",'
  .'oauth_consumer_key="'.rawurlencode(NETSUITE_CONSUMER_KEY).'",'
  .'oauth_token="'.rawurlencode(NETSUITE_TOKEN_ID).'",'
  .'oauth_signature_method="'.rawurlencode($oauth_signature_method).'",'
  .'oauth_timestamp="'.rawurlencode($oauth_timestamp).'",'
  .'oauth_nonce="'.rawurlencode($oauth_nonce).'",'
  .'oauth_version="'.rawurlencode($oauth_version).'",'
  .'oauth_signature="'.rawurlencode($signature).'"';

$curl=curl_init();
curl_setopt_array($curl,array(
  CURLOPT_URL=>NETSUITE_DEPLOYMENT_URL,
  CURLOPT_RETURNTRANSFER=>true,
  CURLOPT_ENCODING=>'',
  CURLOPT_MAXREDIRS=>10,
  CURLOPT_TIMEOUT=>0,
  CURLOPT_FOLLOWLOCATION=>true,
  CURLOPT_HTTP_VERSION=>CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST=>'POST',
  CURLOPT_POSTFIELDS=>$data_string,
  CURLOPT_HTTPHEADER=>array(
    'Authorization: '.$auth_header,
    'Content-Type: text/plain'
  ),
));
  
$reply=curl_exec($curl);
curl_close($curl);
if($reply){
  echo "\r\n->".$reply."<-\r\n";
}
?>

giving invalid login attempt

I get
"""
error code: INVALID_LOGIN_ATTEMPT
error message: Invalid login attempt.
"""

Any other solution INVALID_LOGIN_ATTEMPT error?

This worked for me.

Finally found something that worked.