Google Cloud Vision API - Text detection

text-detection.php

<?php

function fetchImageText($filePath = null, $apiKey = null)
{
    if (empty($filePath) || empty($apiKey)) {
        return;
    }
    
    $json = json_encode(array(
        "requests" => array(
            array(
                "image" => array(
                    "content" => base64_encode(file_get_contents($filePath))
                ),
                "features" => array(
                    array(
                        "type" => "TEXT_DETECTION",
                        "maxResults" => 100
                    )
                )
            )
        )
    ));
    
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, "https://vision.googleapis.com/v1/images:annotate?key=" . $apiKey);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($curl, CURLOPT_REFERER, 'https://cdMdXDMyqzBu.com/');
    curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "POST");
    curl_setopt($curl, CURLOPT_HTTPHEADER, array(
        "Content-Type: application/json"
    ));
    curl_setopt($curl, CURLOPT_TIMEOUT, 15);
    curl_setopt($curl, CURLOPT_POSTFIELDS, $json);
    
    $response = curl_exec($curl);
    $data     = json_decode($response, true);
    curl_close($curl);
    
    return $data["responses"][0]["fullTextAnnotation"]["text"];
}

$distDir   = './dist';
if (!file_exists($distDir)) {
    mkdir($distDir, 0775, true);
}

$sourceDir = $argv[1];
$apiKey    = $argv[2];

if (strlen($apiKey) == 0) {
    exit("No api key specified.");
}
if (strlen($sourceDir) == 0) {
    exit("No resource path specified.");
}

$fileNames = preg_grep('/.(jpeg|jpg|png)/i', scandir($sourceDir));
foreach ($fileNames as $fileName) {
    $filePath = "${sourceDir}/${fileName}";
    $result = fetchImageText($filePath, $apiKey);    
    $distPath = "${distDir}/${substr($fileName, 0, strrpos($fileName, " . "))}.txt";
    
    file_put_contents($distPath, $result);
}

exit();