Use Docomo Image API Sample

use_docomo.php

<?php
$file = file_get_contents($image_path);
$ch = curl_init();
curl_setopt_array($ch,[
    CURLOPT_URL => $api_url . '?APIKEY=' . $api_key,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST => true,
    CURLOPT_POSTFIELDS => [
        'modelName' => 'food',
        'image' => new CURLFile($image_path)
    ],
]);
$exec = curl_exec($ch);
$results = json_decode($exec);
$results = $results->candidates;
foreach ($results as $result) {
    $tag = $result->tag;
    $score = $result->score;
}