Question

我有一个省的下拉列表，其默认值是根据从SQL中获取的用户省份确定的：

$getProvince = $db->prepare("
    SELECT province
        FROM users
        WHERE userid = :id
");
$getProvince->execute(array(
    ':id' => $_SESSION["userident"]
));
$province = $getProvince->fetchColumn();

<select name="addprov">
    <option value="AB" <?php if ($province == "AB") { echo "selected='selected'"; } ?>>Alberta</option>
    <option value="BC" <?php if ($province == "BC") { echo "selected='selected'"; } ?>>British Columbia</option>
    <option value="MB" <?php if ($province == "MB") { echo "selected='selected'"; } ?>>Manitoba</option>
    <option value="NB" <?php if ($province == "NB") { echo "selected='selected'"; } ?>>New Brunswick</option>
    <option value="NFLD" <?php if ($province == "NFLD") { echo "selected='selected'"; } ?>>Newfoundland & Labrador</option>
    <option value="NS" <?php if ($province == "NS") { echo "selected='selected'"; } ?>>Nova Scotia</option>
    <option value="ON" <?php if ($province == "ON") { echo "selected='selected'"; } ?>>Ontario</option>
    <option value="PEI" <?php if ($province == "PEI") { echo "selected='selected'"; } ?>>Prince Edward Island</option>
    <option value="QC" <?php if ($province == "QC") { echo "selected='selected'"; } ?>>Quebec</option>
    <option value="SK" <?php if ($province == "SK") { echo "selected='selected'"; } ?>>Saskatchewan</option>
</select>

你可以看到这是多么丑陋。有没有一种优化方法，所以眼睛不是很难？

Answer 1

将您的选项粘贴在数组中，然后循环html输出。

$provinces = array(
    'AB' => 'Alberta',
    'BC' => 'British Columbia',
    'MB' => 'Manitoba',
    //...
);

$province = ''; // your query result

然后输出......

<select name="addprov">
    <?php foreach ($provinces as $key => $value): ?>
    <option value="<?php echo $key; ?>" <?php if ($province === $key): ?>selected="selected"<?php endif; ?>><?php echo $value; ?></option>
    <?php endforeach; ?>
</select>

从SQL中获取默认值来优化下拉列表？

1 个答案: