Tips for PHP developers: The clever combination of Alibaba Cloud OCR and text processing

Tips for PHP developers: The clever combination of Alibaba Cloud OCR and text processing

With the advent of the digital age, more and more companies and individuals have begun to pay attention to text processing and analysis. In PHP development, how to use existing technologies and services to achieve efficient OCR (Optical Character Recognition, optical character recognition) and text processing functions has become an urgent problem for developers to solve.

As a widely used scripting language, PHP has a wealth of third-party libraries and services to choose from. This article will focus on how to cleverly use Alibaba Cloud OCR service and text processing functions, and provide some tips for PHP developers.

1. Preparation

1. Register an Alibaba Cloud account and obtain AccessKeyId and AccessKeySecret. These two parameters will be used to call the Alibaba Cloud API interface.
2. Install aliyun-sdk-php library. This is the PHP SDK officially provided by Alibaba Cloud, which is used to conveniently make service calls. It can be installed through composer, or downloaded from github and introduced manually.

2. Use Alibaba Cloud OCR to realize image text recognition

Alibaba Cloud OCR service provides a fast and accurate way to extract text from images. The following is a basic sample code:

require_once '/path/to/aliyun-sdk-php/autoload.php';

use AlibabaCloudClientAlibabaCloud;
use AlibabaCloudClientExceptionClientException;
use AlibabaCloudClientExceptionServerException;
use AlibabaCloudOcrOcr;
use AlibabaCloudOcrOcrGeneralBasic;

AlibabaCloud::accessKeyClient('YOUR_ACCESS_KEY_ID', 'YOUR_ACCESS_KEY_SECRET')
    ->regionId('cn-hangzhou')
    ->asDefaultClient();

try {
    $res = Ocr::v20191230()->generalBasic()
        ->jsonBody([
            'ImageURL' => 'https://example.com/image.jpg'
        ])
        ->request();
    print_r($res->getData());
} catch (ClientException $e) {
    echo $e->getErrorMessage() . PHP_EOL;
} catch (ServerException $e) {
    echo $e->getErrorMessage() . PHP_EOL;
}

In the above example, the required classes are first introduced as required. Then, use accessKey and accessKeySecret to initialize the aliyun-sdk-php client. Finally, call the generalBasic interface of Alibaba Cloud OCR, pass in the URL of the image to be processed, and obtain the text recognition results.

3. Use text processing API to extract key information

Alibaba Cloud text processing service provides a series of functions, such as keyword extraction, entity recognition, sentiment analysis, etc., which can help developers more Process and analyze written information effectively. The following is a simple sample code:

require_once '/path/to/aliyun-sdk-php/autoload.php';

use AlibabaCloudClientAlibabaCloud;
use AlibabaCloudClientExceptionClientException;
use AlibabaCloudClientExceptionServerException;
use AlibabaCloudNlpNlp;

AlibabaCloud::accessKeyClient('YOUR_ACCESS_KEY_ID', 'YOUR_ACCESS_KEY_SECRET')
    ->regionId('cn-hangzhou')
    ->asDefaultClient();

try {
    $res = Nlp::v20180408()->namedEntityRecognition()->jsonBody([
        'Text' => '这是一段待处理的文本。',
        'Language' => 'ZH'
    ])->request();
    print_r($res->getData());
} catch (ClientException $e) {
    echo $e->getErrorMessage() . PHP_EOL;
} catch (ServerException $e) {
    echo $e->getErrorMessage() . PHP_EOL;
}

In the above example, the required classes are first introduced as required. Then, use accessKey and accessKeySecret to initialize the aliyun-sdk-php client. Finally, call the namedEntityRecognition interface of Alibaba Cloud Text Processing, pass in the text and language type to be processed, and obtain the named entity recognition results.

4. Example of combining Alibaba Cloud OCR and text processing services

The following is a sample code that combines Alibaba Cloud OCR and text processing services:

require_once '/path/to/aliyun-sdk-php/autoload.php';

use AlibabaCloudClientAlibabaCloud;
use AlibabaCloudClientExceptionClientException;
use AlibabaCloudClientExceptionServerException;
use AlibabaCloudOcrOcr;
use AlibabaCloudNlpNlp;

AlibabaCloud::accessKeyClient('YOUR_ACCESS_KEY_ID', 'YOUR_ACCESS_KEY_SECRET')
    ->regionId('cn-hangzhou')
    ->asDefaultClient();

try {
    $ocrRes = Ocr::v20191230()->generalBasic()->jsonBody([
        'ImageURL' => 'https://example.com/image.jpg'
    ])->request();

    $text = '';
    foreach ($ocrRes->getData()['Data']['OCRTexts']['OCRText'] as $ocrText) {
        $text .= $ocrText['Text'] . ' ';
    }

    $nlpRes = Nlp::v20180408()->keywordExtraction()->jsonBody([
        'Text' => $text,
        'Language' => 'ZH'
    ])->request();

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

In the above In the example, the Alibaba Cloud OCR service is first called to extract the text from the image. Then, the recognized text is passed to Alibaba Cloud text processing service for keyword extraction. Finally, the keyword extraction results are output.

Summary:

This article introduces how to use Alibaba Cloud OCR and text processing services to achieve efficient image text recognition and text processing functions. By combining these two services, PHP developers can more easily process and analyze large amounts of text information, providing more convenient solutions for businesses and individuals. I believe these tips will be helpful to PHP developers.

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