Bluemix の Cloudant から、 PHP で画像ファイルをダウンロード

次のページで行うことと同じことを、PHP で行いました。
Bluemix の Cloudant から、python3 で画像ファイルをダウンロード
Bluemix の Cloudant から、 Node.js で画像ファイルをダウンロード

from_cloudant.php

#! /usr/bin/php
<?php
// ------------------------------------------------------------------
//  from_cloudant.php
//
//                  Jul/27/2017
//
// ------------------------------------------------------------------
function curl_get_proc ($url)
{
    $ch = curl_init();
    curl_setopt ($ch, CURLOPT_URL, $url);
    curl_setopt ($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt ($ch, CURLOPT_PROXY, "");

    $data = curl_exec($ch);

    curl_close($ch);

    return $data;
}

// ------------------------------------------------------------------
function file_write_proc ($string_out,$file_out)
{
    $fp_out=fopen ($file_out,"w");
    flock ($fp_out,LOCK_EX);
    fputs ($fp_out,$string_out);
    flock ($fp_out,LOCK_UN);
    fclose ($fp_out);

    chmod ($file_out,0666);
}

// ------------------------------------------------------------------
// [6]:
function download_jpg_proc($url_collection,$key)
{
    $file_jpg= $key . ".jpg";

    $url_jpg = $url_collection . "/" . $key . "/" . $file_jpg;

    $image = curl_get_proc ($url_jpg);

    file_write_proc ($image,$file_jpg);
}

// ------------------------------------------------------------------
// [2]:
function list_keys_proc($url_collection)
{
    $url_all_docs = $url_collection . "/_all_docs?include_docs=true";

    $json_string = curl_get_proc ($url_all_docs);

    $list_aa = json_decode ($json_string,true);

    $rows = $list_aa['rows'];

    $keys= array ();
    foreach ($rows as $unit)
        {
        $keys[] = $unit['key'];
        }

    return $keys;
}

// ------------------------------------------------------------------
print   "*** 開始 ***\n";

$url="https://44b508dd-f332-4f91-81f2-78369c7d29d9-bluemix:[e-mail]";
#
$url_collection = $url . '/jpg';
print   "url_collection = " .$url_collection . "\n";

$keys = list_keys_proc($url_collection);

foreach ($keys as $key)
    {
    print $key . "\n";
    download_jpg_proc($url_collection,$key);
    }

print   "*** 終了 ***\n";

// ------------------------------------------------------------------
?>