Php Infinitus _ PHP Tutorial

Php Infinitus classification. Php Infinitus classification is often used. I have used it well before, so I have not studied it carefully. today, due to the needs of the project, A php Infinitus classification is required temporarily.

Php Infinitus classification is often used. I have used it well before, so I have not studied it carefully. today, due to the needs of the project, you need to temporarily create a php Infinitus classification, and then make a simple one. The record is as follows. if you need it, you can check it out.

Data table structure

Create table if not exists 'Category '('id' int (5) not null AUTO_INCREMENT COMMENT 'unique auto-incrementing ID', 'pid' int (5) not null default '0' COMMENT 'parent ID', 'sort 'int (2) not null default '0' comment' sort number', 'name' varchar (30) default null comment 'name', primary key ('id') ENGINE = MyISAM default charset = utf8 COMMENT = 'infinitus classification table' AUTO_INCREMENT = 1;

Data

Insert into 'category '('id', 'pid', 'sort ', 'name') VALUES (1, 0, 1, 'php'), (2, 0, 2, 'database'), (3, 0, 3, 'javascript '), (4, 1, 1, 'framework template'), (5, 1, 2, 'function summary'), (6, 2, 1, 'mysql'), (7, 4, 1, 'framework'), (8, 4, 2, 'Template'), (9, 8, 1, 'smarty '), (10, 7, 2, 'thinkphp'), (11, 10, 1, 'thinkphp Times'), (12, 10, 2, 'thinkphp templates'), (13, 12, 3, 'Template knowledge summary'), (14, 12, 2, 'template video example'), (15, 11, 1, 'Model Times ');

Function implementation code

function tree(&$list,$pid=0,$level=0,$html='--'){    static $tree=array();    foreach($list as $v){        if($v['pid']==$pid){            $v['level']=$level;            $v['html']=str_repeat($html,$level);            $tree[]=$v;            tree($list,$v['id'],$level+1,$html);        }     }    return $tree;}

The first parameter $ list of the tree function above is the result set obtained from a two-dimensional array in the preceding table. Note that order by sort asc must be added to the SQL statement used to obtain the result set from the database. Otherwise, the sort field cannot be used for sorting.

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Limit php Infinitus classification is often used. I have used it well before, so I have not studied it carefully. today, due to the needs of the project, I need to do a temporary task...