如何利用PHP和阿里云OCR快速提取PDF文件中的文字？

composer require alibabacloud/ocr-sdk-php

<?php
use AlibabaCloudClientAlibabaCloud;
use AlibabaCloudClientExceptionClientException;
use AlibabaCloudClientExceptionServerException;

AlibabaCloud::accessKeyClient('your-access-key-id', 'your-access-key-secret')
            ->regionId('cn-shanghai')
            ->asDefaultClient();
?>

try {
    $result = AlibabaCloud::rpc()
              ->product('ocr')
              ->scheme('https')
              ->version('2019-12-30')
              ->action('ocr_document_recognize')
              ->method('POST')
              ->host('ocr.cn-shanghai.aliyuncs.com')
              ->options([
                'query' => [
                  'RegionId' => 'cn-shanghai',
                  'AccessKeyId' => 'your-access-key-id',
                  'AccessKeySecret' => 'your-access-key-secret',
                ],
              ])
              ->request();
    
    // 解析返回结果
    $text = '';
    foreach ($result['Data']['Regions'] as $region) {
        foreach ($region['Lines'] as $line) {
            $text .= $line['Text'] . "
";
        }
    }
    
    // 打印提取的文字
    echo $text;

} catch (ClientException $e) {
    echo $e->getErrorMessage() . PHP_EOL;
} catch (ServerException $e) {
    echo $e->getErrorMessage() . PHP_EOL;
}