[英]How to put categories and subcategories on selectbox with optgroup with just one query with PHP?
[英]How to generate dynamic selectbox with optgroup
嗨,我有這個mysql表。
CREATE TABLE IF NOT EXISTS `selling_counties` (
`county_id` int(11) NOT NULL auto_increment,
`country` varchar(20) collate utf8_unicode_ci NOT NULL,
`county_name` varchar(25) collate utf8_unicode_ci NOT NULL,
`datecreated` datetime NOT NULL,
`datemodified` datetime NOT NULL,
PRIMARY KEY (`county_id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=97 ;
我需要一個帶有optgroup的selectbox,其中country將是,County_name將是s,例如
<select name ="county">
<optgroup label="England">
<option>South Yorkshire</option>
<option>Staffordshire</option>
<option>Suffolk</option>
<option>Surrey</option>
<option>Tyne and Wear</option>
<option>Warwickshire</option>
<option>West Midlands</option>
<option>West Sussex</option>
<option>West Yorkshire</option>
<option>Wiltshire</option>
<option>Worcestershire</option>
</optgroup>
<optgroup label="Wales">
<option>Clwyd</option>
<option>Dyfed</option>
<option>Gwent</option>
<option>Gwynedd</option>
<option>Mid Glamorgan</option>
<option>Powys</option>
<option>South Glamorgan</option>
<option>West Glamorgan</option>
</optgroup>
<optgroup label="Scotland">
<option>Aberdeenshire</option>
<option>Angus</option>
<option>Argyll</option>
<option>Selkirkshire</option>
<option>Shetland</option>
<option>Stirlingshire</option>
<option>Sutherland</option>
<option>West Lothian</option>
<option>Wigtownshire</option>
</optgroup>
<optgroup label="Northern Ireland">
<option>Antrim</option>
<option>Armagh</option>
<option>Down</option>
<option>Fermanagh</option>
<option>Londonderry</option>
<option>Tyrone</option>
</optgroup>
</select>
我已經嘗試過該PHP:使用optgroup進行動態下拉,但是對我來說有點復雜,因為我是php的新手,而且它來自2個單獨的表,而我來自同一表。
任何幫助將是非常可貴的。
創建一個像這樣的新數組,將國家作為鍵,將縣數組作為每個值。 假設$rows
是原始表行的數組。
<?php
$countries = array();
foreach($rows as $row)
{
if(isset($countries[$row['country']])) // <-- edit, was missing a ]
{
$contries[$row['country']][] = $row['county_name'];
}
else
{
$countries[$row['country']] = array($row['county_name']);
}
}
?>
<select name ="county">
<?php foreach($countries as $country => $counties): ?>
<optgroup label="<?php echo htmlentities($country); ?>">
<?php foreach($counties as $county): ?>
<option><?php echo htmlentities($county); ?></option>
<?php endforeach; ?>
</optgroup>
<?php endforeach; ?>
</select>
您需要從表中選擇值
$mysqli = new mysqli($host, $user, $passwd, $database);
$result = $mysqli->query('select county_id, country, county_name from selling_counties');
$countries = array();
while ($row = $result->fetch_assoc()) {
$country = $row['country'];
if (!array_key_exists($country, $countries))
$countries[$country] = array();
$countries[$country][] = array($row['county_id'], $row['county']);
}
並將它們放在您的html select中。
更新以在<option>
添加county_id
:
<option value="<?php echo htmlentities($county[0]); ?>"><?php echo htmlentities($county[1]); ?></option>
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.