Untitled

<?php

/**
 * 呼叫 flickr.people.getPublicPhotos
 * @param string $user_id 要傳回照片的user id
 * @return string json格式的字串
 */
function getPublicPhotos($user_id) {
    $ch = curl_init();
    //產生API網址，有部分參數在此寫死，例如輸出格式這邊是直接設定為JSON
    $api_key = '3dd490cec911376eb3356af84efc05e6';
    $url = "https://api.flickr.com/services/rest/?method=flickr.people.getPublicPhotos&api_key={$api_key}&user_id={$user_id}&format=json&nojsoncallback=1";
    $options = array(
        CURLOPT_URL => $url,
        CURLOPT_HEADER => false,
        CURLOPT_RETURNTRANSFER => true,
            //CURLOPT_SSL_VERIFYHOST => 0,
            //CURLOPT_SSL_VERIFYPEER => 0,
    );
    curl_setopt_array($ch, $options);
    $result = curl_exec($ch);
    curl_close($ch);
    return $result;
}

//檢查是否有GET的user_id參數
if (isset($_GET['user_id']) and !empty($_GET['user_id'])) {
    $user_id = $_GET['user_id'];
    $data = getPublicPhotos($user_id);
    $json = json_decode($data, true);
    $photos = $json['photos']['photo'];
} else {
    $photos = array();
}
?>

<html>
    <head></head>
    <body>
        <form method="get">
            <label>user_id <input type="text" name="user_id" value="<?php echo isset($_GET['user_id']) ? $_GET['user_id'] : ''; ?>"></label>
            <input type="submit">
        </form>
        <div>
            <?php
            foreach ($photos as &$photo) {
                //產生flickr的連結
                $url = "https://www.flickr.com/photos/{$photo['owner']}/{$photo['id']}";
                //產生照片的連結
                $img = "http://www.flickr.com/photos/{$photo['id']}_{$photo['secret']}.jpg";
                //另一種產生照片連結的方法
                //$img = "https://farm{$photo['farm']}.staticflickr.com/{$photo['server']}/{$photo['id']}_{$photo['secret']}.jpg";
                echo "<a href=\"$url\" target=\"_blank\"><img src=\"{$img}\" border=\"0\"></a>\n";
            }
            ?>
        </div>
    </body>
</html>