mysql和php無限分類 資料歸類 輸出

資料歸類解釋：利用pid(子級)=id(父級)；讓子級迴圈的時自己去找父級在哪兒，然後加入其中；

資料表結構：

create table `newtable` (

`id`  int(10) unsigned not null auto_increment ,
`pid`  int(10) unsigned not null ,
`name`  varchar(255) character set utf8 collate utf8_general_ci null default '' ,
primary key (`id`),
index `pid` (`pid`) using btree 
)engine=innodb
default character set=latin1 collate=latin1_swedish_ci
auto_increment=1
row_format=compact;

insert into `test1` values (1, 0, 'menu1');

insert into `test1` values (2, 0, 'menu2');
insert into `test1` values (3, 0, 'menu3');
insert into `test1` values (4, 0, 'menu4');
insert into `test1` values (5, 0, 'menu5');
insert into `test1` values (6, 0, 'menu6');
insert into `test1` values (7, 1, 'menu1-1');
insert into `test1` values (8, 1, 'menu1-2');
insert into `test1` values (9, 1, 'menu1-3');
insert into `test1` values (10, 7, 'menu7-1');
insert into `test1` values (11, 7, 'menu7-2');
insert into `test1` values (12, 7, 'menu7-3');
insert into `test1` values (13, 7, 'menu7-4');
insert into `test1` values (14, 10, 'menu10-1');
insert into `test1` values (15, 10, 'menu10-2');
insert into `test1` values (16, 10, 'menu10-3');
insert into `test1` values (17, 8, 'menu8-1');

<?php

use think\db;
use think\debug;
class index 
//將有pid的元素，整合到對應的pid=id（這一步是最重要的）
foreach ($tree as $key => $val) 
}//去除tree中有pid的元素，因為他們已經被歸類了；
foreach ($tree as $key => $val) 
$temp = array();
$grup = '';
$flag = '|--';
$this->recursive($tree,$temp,$grup,$flag);
var_dump($temp);exit;
}public function recursive($data,&$temp,&$division,$flag)
}$division = $divit;
return false;
}}

array(17)

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