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August 19, 2011 06:06
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PHP5.3 コールバックでクロージャを使うサンプル with はてなハイクAPI
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| <?php | |
| namespace Holy\Example; | |
| class Util { | |
| public static function H($data, $default=null) { | |
| $var = $default; | |
| if (isset($data) && is_scalar($data) && strlen($data) >= 1) { | |
| $var = htmlspecialchars($data, \ENT_QUOTES, 'UTF-8'); | |
| } | |
| return $var; | |
| } | |
| } | |
| class ItemList extends \ArrayIterator { | |
| public function __call($name, $args) { | |
| if (!isset($this->$name) || !is_callable($this->$name)) { | |
| throw new \RuntimeException( | |
| sprintf("The Property '%s' is not callable.", $name)); | |
| } | |
| return call_user_func_array($this->$name, $args); | |
| } | |
| } | |
| use Holy\Example\Util as U; | |
| $word = (isset($_GET['word']) && strlen($_GET['word']) >= 1) | |
| ? $_GET['word'] : 'いただきます'; | |
| $items = new ItemList(json_decode(file_get_contents( | |
| 'http://h.hatena.ne.jp/api/statuses/keyword_timeline.json?word=' | |
| . rawurlencode($word) . '&page=1&count=50'))); | |
| $items->sort = function($name, $desc=false) use ($items) { | |
| if (!property_exists($items[0], $name)) { | |
| throw new \RuntimeException( | |
| sprintf("The field '%s' is not defined.", $name)); | |
| } | |
| $items->uasort(function($item1, $item2) use ($name, $desc) { | |
| return ($desc) | |
| ? strnatcasecmp($item2->$name, $item1->$name) | |
| : strnatcasecmp($item1->$name, $item2->$name); | |
| }); | |
| }; | |
| if (isset($_GET['sort'])) { | |
| $items->sort($_GET['sort'], | |
| (isset($_GET['desc'])) ? (bool)$_GET['desc'] : false); | |
| } | |
| $title = 'はてなハイクAPIサンプル'; | |
| $fields = array('created_at', 'favorited'); | |
| ?> | |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="UTF-8" /> | |
| <title><?=U::H($title)?></title> | |
| <style type="text/css"> | |
| table {border-collapse:collapse;border-spacing:0px;} | |
| th,td {padding:1px; border:solid 1px #999999;} | |
| </style> | |
| </head> | |
| <body> | |
| <h1><?=U::H($title)?></h1> | |
| <form method="get" action="<?=$_SERVER['SCRIPT_NAME']?>"> | |
| keyword:<input type="text" name="word" value="<?=U::H($word)?>" /> | |
| <?php foreach ($fields as $value) : ?> | |
| <input type="radio" name="sort" | |
| value="<?=U::H($value)?>" id="sort_<?=U::H($value)?>" | |
| <?=(isset($_GET['sort']) && $_GET['sort'] === $value) ? 'checked="checked"' : ''?> | |
| /><label for="sort_<?=U::H($value)?>"><?=U::H($value)?></label> | |
| <?php endforeach ?> | |
| <input type="checkbox" name="desc" value="1" id="desc" | |
| <?=(isset($_GET['desc']) && $_GET['desc']) ? 'checked="checked"' : ''?> | |
| /><label for="desc">desc</label> | |
| <input type="submit" value="送信" /> | |
| </form> | |
| <dl> | |
| <?php foreach ($items as $item) : ?> | |
| <dd> | |
| <?=U::H(date('Y-m-d H:i:s', strtotime($item->created_at)))?> | |
| <?=U::H($item->keyword)?> | |
| </dd> | |
| <dd> | |
| ☆<?=U::H($item->favorited)?> | |
| <pre><?=preg_replace_callback( | |
| '~(?:http[s]?://)[-_.!\~*a-zA-Z0-9;/?:@&=+$,%#]+\.(?:jpg|gif|png)~i', | |
| function($matches) { | |
| if (isset($matches[0])) { | |
| return sprintf( | |
| '<img src="%s" width="100" /><a href="%s" target="_blank">■</a>', | |
| U::H($matches[0]), | |
| U::H($matches[0]) | |
| ); | |
| } | |
| }, mb_substr($item->text, mb_strlen($item->keyword) + 1));?></pre> | |
| </dd> | |
| <?php endforeach ?> | |
| </dl> | |
| </body> | |
| </html> |
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コールバックでArrayIteratorをソートするのにサンプルデータを用意するのが面倒だったので、はてなハイクAPI使ってみた。
テキストに含まれる画像のURLをimgタグに置換するのにpreg_replace_callback()を使ったりと、結果的にPHP5.3のコールバックっぽい内容になったと思う。