Direct HTTP API for High-Accuracy Invoice Parsing

<?php

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// 👉 https://structocr.com/register

$apiKey = 'YOUR_API_KEY_HERE';
$apiUrl = 'https://api.structocr.com/v1/invoice';
$imagePath = 'invoice.jpg';

// 1. Validate File
if (!file_exists($imagePath)) {
    die("Error: File not found at $imagePath");
}

// 2. Encode Image to Base64
$imageData = file_get_contents($imagePath);
$base64Image = base64_encode($imageData);

// 3. Prepare Payload
$payload = json_encode(['img' => $base64Image]);

// 4. Initialize cURL
$ch = curl_init();
curl_setopt_array($ch, [
    CURLOPT_URL => $apiUrl,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST => true,
    CURLOPT_POSTFIELDS => $payload,
    CURLOPT_HTTPHEADER => [
        'Content-Type: application/json',
        'x-api-key: ' . $apiKey, // Key Header
        'Content-Length: ' . strlen($payload)
    ]
]);

// 5. Execute Request
$response = curl_exec($ch);
$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

if (curl_errno($ch)) {
    die('cURL Error: ' . curl_error($ch));
}
curl_close($ch);

// 6. Handle Response
$result = json_decode($response, true);

if ($httpCode === 200 && isset($result['success']) && $result['success']) {
    $data = $result['data'];
    
    echo "✅ Invoice Processed Successfully!\n";
    echo "----------------------------------\n";
    echo "Invoice #: " . ($data['invoice_number'] ?? 'N/A') . "\n";
    echo "Date:      " . ($data['date'] ?? 'N/A') . "\n";
    echo "Vendor:    " . ($data['merchant']['name'] ?? 'Unknown') . "\n";
    
    // Financials
    $fin = $data['financials'] ?? [];
    echo "Total:     " . ($fin['total_amount'] ?? 0) . " " . ($data['currency'] ?? '') . "\n";
    
    // Line Items
    echo "\n--- Line Items ---\n";
    if (!empty($data['line_items'])) {
        foreach ($data['line_items'] as $item) {
            echo "- " . str_pad($item['description'], 30) . ": " . $item['amount'] . "\n";
        }
    }
} else {
    echo "❌ Processing Failed (Status $httpCode)\n";
    if (isset($result['error'])) {
        echo "Error: " . $result['error'] . "\n";
        echo "Message: " . ($result['message'] ?? '') . "\n";
    } else {
        echo $response;
    }
}
?>