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Changelog

The method allows you to download a cost invoice PDF file attached to a purchase order.

purchase_order_id

int

Purchase order identifier from BaseLinker

The method returns the data in JSON format.

status	varchar(30)	SUCCESS - request executed correctly ERROR - an error occurred during an API request. Error details will be described in 2 additional returned fields: error_message and error_code
file	text	Invoice PDF file in binary format encoded in base64, with prefix "data:"
cost_invoice_no	varchar(100)	Cost invoice number
file_name	varchar(255)	Invoice file name

Input data:
{ "purchase_order_id": 4521 } Output data:
{ "status": "SUCCESS", "file": "data:4AAQSkZJRgABA[...]", "cost_invoice_no": "FV/2026/03/001", "file_name": "FV/2026/03/001.pdf" } A sample request in PHP:
<?php $methodParams = '{ "purchase_order_id": 4521 }'; $apiParams = [ "method" => "getInventoryPurchaseOrderFile", "parameters" => $methodParams ]; $curl = curl_init("https://api.baselinker.com/connector.php"); curl_setopt($curl, CURLOPT_POST, 1); curl_setopt($curl, CURLOPT_HTTPHEADER, ["X-BLToken: xxx"]); curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query($apiParams)); $response = curl_exec($curl);