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プルダウンを使ったarray_filter関数のサンプル

配列定義


// フルーツ種類定義 
define("APPLE",  1);
define("BANANA", 2);
define("ORANGR", 3);
define("CHERRY", 4);
define("GRAPE",  5);


// フルーツ配列
define(
	'FRUIT',
	array(
		APPLE  => 'りんご',
		BANANA => 'バナナ',
        ORANGR => 'オレンジ',
        CHERRY => 'さくらんぼ',
        GRAPE  => 'ぶどう',
	)
);

array_filterで範囲を指定

バナナまでの表示に設定

// リンゴからバナナに指定
$filtered_furuit = array_filter(
    FRUIT,
    function ($key) {
        return $key <= ORANGR;
    },
    ARRAY_FILTER_USE_KEY
);

表示

<th>フルーツ</th>
<td>
    <select name="furuit" class="chosen-select">
    <option value="">全て</option>
        <?php foreach ($filtered_furuit as $key => $val) { ?>
            <option value="<?php echo $key; ?>"<?php echo (isset($_POST['furuit']) && $_POST['furuit'] == $key) ? 'selected' : ''; ?>><?php echo $val; ?></option>
        <?php } ?>
    </select>
</td>
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