下面是“iOS省市二级联动的数据组织PHP版”详细攻略,分以下几个部分:
1.前置知识
2.数据组织
3.PHP实现代码
4.示例说明
1.前置知识
在进行iOS省市二级联动之前,我们需要掌握以下前置知识:
- PHP基础语法:包括变量、数组、循环语句等
- 数据库基本操作:包括增删改查操作(CRUD操作)
- JSON数据格式:了解JSON数据结构的基本概念及用法
2.数据组织
这里我们使用MySQL数据库存储省市区数据。表结构如下:
CREATE TABLE IF NOT EXISTS `area` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`pid` int(11) NOT NULL,
`name` varchar(50) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;
其中,id
为区域唯一标识,pid
为父级区域的id,name
为区域名称。
我们需要在该表中插入省市区数据。省市区数据格式如下:
{
"北京市": {
"北京市": [
"东城区",
"西城区",
"崇文区",
"宣武区",
"朝阳区",
"海淀区",
"丰台区",
"石景山区",
"房山区",
"通州区",
"顺义区",
"昌平区",
"大兴区",
"怀柔区",
"平谷区",
"密云区",
"延庆区"
]
},
"天津市": {
"天津市": [
"和平区",
"河东区",
"河西区",
"南开区",
"河北区",
"红桥区",
"东丽区",
"西青区",
"津南区",
"北辰区",
"武清区",
"宝坻区",
"滨海新区",
"宁河区",
"静海区",
"蓟县"
]
},
...
}
我们需要将该JSON数据格式转换为MySQL数据库的数据格式。可以通过遍历该JSON数据,将其转换为如下格式:
id pid name
1 0 北京市
2 1 北京市
3 2 东城区
4 2 西城区
...
其中,pid
为0表示省级区域,非0表示市级或区级区域。
3.PHP实现代码
接下来,我们使用PHP实现将JSON数据格式转换并插入MySQL数据库的操作。
连接MySQL数据库
$conn = mysqli_connect($host, $user, $password, $dbname);
其中,$host
为数据库主机地址,$user
为数据库用户名,$password
为数据库密码,$dbname
为数据库名。
解析JSON数据
$json = file_get_contents('area.json');
$data = json_decode($json, true);
通过file_get_contents
函数读取JSON文件数据,然后通过json_decode
函数将JSON数据解析为数组。
遍历数组并插入数据
foreach ($data as $province => $cities) {
$province_sql = "INSERT INTO area (pid, name) VALUES (0, '{$province}')";
mysqli_query($conn, $province_sql);
$province_id = mysqli_insert_id($conn);
foreach ($cities as $city => $districts) {
$city_sql = "INSERT INTO area (pid, name) VALUES ({$province_id}, '{$city}')";
mysqli_query($conn, $city_sql);
$city_id = mysqli_insert_id($conn);
foreach ($districts as $district) {
$district_sql = "INSERT INTO area (pid, name) VALUES ({$city_id}, '{$district}')";
mysqli_query($conn, $district_sql);
}
}
}
遍历二维数组,分别插入省、市、区数据。
完整代码
$conn = mysqli_connect($host, $user, $password, $dbname);
$json = file_get_contents('area.json');
$data = json_decode($json, true);
foreach ($data as $province => $cities) {
$province_sql = "INSERT INTO area (pid, name) VALUES (0, '{$province}')";
mysqli_query($conn, $province_sql);
$province_id = mysqli_insert_id($conn);
foreach ($cities as $city => $districts) {
$city_sql = "INSERT INTO area (pid, name) VALUES ({$province_id}, '{$city}')";
mysqli_query($conn, $city_sql);
$city_id = mysqli_insert_id($conn);
foreach ($districts as $district) {
$district_sql = "INSERT INTO area (pid, name) VALUES ({$city_id}, '{$district}')";
mysqli_query($conn, $district_sql);
}
}
}
4.示例说明
示例1:查询所有省份
$sql = "SELECT * FROM area WHERE pid=0";
$result = mysqli_query($conn, $sql);
$provinces = array();
while ($row = mysqli_fetch_array($result)) {
$provinces[] = $row['name'];
}
print_r($provinces);
示例2:查询某个省份下的所有城市
$province = '广东省';
$province_sql = "SELECT id FROM area WHERE name='{$province}' AND pid=0";
$result = mysqli_query($conn, $province_sql);
$row = mysqli_fetch_array($result);
$province_id = $row['id'];
$city_sql = "SELECT * FROM area WHERE pid={$province_id}";
$result = mysqli_query($conn, $city_sql);
$cities = array();
while ($row = mysqli_fetch_array($result)) {
$cities[] = $row['name'];
}
print_r($cities);
以上就是“iOS省市二级联动的数据组织PHP版”的完整攻略。
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