Use PHP Arrays for unlimited classification, without databases or recursion.

Copy codeThe Code is as follows:
<? Php

Class cat
{
Public $ data;

Public function _ construct ()
{
@ Include "data. php ";
$ This-> data = $ class;
}


Public function CreateSortLevel ($ fatherlevel)
{
If (empty ($ fatherlevel ))
{
If (is_array ($ this-> data ))
{
$ Fast_level = array ();
Foreach ($ this-> data as $ value)
{
If (strlen ($ value ["sortlevel"]) = 3)
{
$ Fast_level [] = $ value ["sortlevel"];
}
}
$ Max_fast_level = max ($ fast_level );
Unset ($ fast_level );
$ Sub = ceil ($ max_fast_level) + 1;
Switch (strlen ($ sub ))
{
Case 1:
Return "00 {$ sub }";
Break;
Case 2:
Return "0 {$ sub }";
Break;
Case 3:
Return $ sub;
Break;
}
}
Else
{
Return "001 ";
}
}

Foreach ($ this-> data as $ val)
{
If (eregi ("^". $ fatherlevel. ". {3} $", $ val ["sortlevel"])
{
$ Level [] = $ val ["sortlevel"];
}
}
If (is_array ($ level ))
{
$ Max_two_level = max ($ level );
$ Sub = ceil (substr ($ max_two_level,-3) + 1;
Switch (strlen ($ sub ))
{
Case 1:
Return substr ($ max_two_level, 0, strlen ($ max_two_level)-1). $ sub;
Break;
Case 2:
Return substr ($ max_two_level, 0, strlen ($ max_two_level)-2). $ sub;
Break;
Case 3:
Return substr ($ max_two_level, 0, strlen ($ max_two_level)-3). $ sub;
Break;
}
}
Else
{
Return $ fatherlevel. "001 ";
}
}

Public function orders ()
{
$ Op = $ this-> data;
$ This-> array_usort ($ op, "sortlevel", SORT_ASC );
Return $ op;
}

Public function add_cat ($ sortname, $ sortlevel)
{
$ Data = time ();
$ Arr = array
(
"{$ Data}" => array
(
"Sortname" => $ sortname,
"Sortlevel" => $ this-> CreateSortLevel ($ sortlevel)
)
);
$ Rs = $ this-> data + $ arr;
$ This-> add_wirte ($ rs );
}

Private function array_usort (& $ array)
{
$ Args = func_get_args ();
For ($ I = 1, $ cmd = '', $ size = count ($ args); $ I <$ size; $ I ++)
{
$ Num = $ I;
$ Order = "";
$ Con = "@ strcmp ($ a ['$ args [$ num]'], $ B ['$ args [$ num]'])";
While (++ $ I <$ size)
{
If ($ args [$ I] === SORT_NUMERIC)
{
$ Con = "($ a ['$ args [$ num]']-$ B ['$ args [$ num]'])";
}
Else if ($ args [$ I] === SORT_DESC)
{
$ Order = "-1 *";
}
Else if (is_string ($ args [$ I])
{
$ I --;
Break;
}
}
$ Cmd. = "if ($ num = $ con) return $ order $ num; else ";
If ($ order! = '')
{
$ I ++;
}
}
@ Usort ($ array, @ create_function ('$ a, $ B', "$ cmd return 0 ;"));
}

Public function wirte ($ sortname, $ sortlevel)
{
$ Array = "<? Phprn ";
$ Array. = '$ class = array'. "rn (rn ";
$ Array. = '"'. time (). '" => array'. "rn ";
$ Array. = '('. "rn ";
$ Array. = '"sortname" => "'. $ sortname. '"'. ", rn ";
$ Array. = '"sortlevel" => "'. $ this-> CreateSortLevel ($ sortlevel). '"'. "rn ";
$ Array. = ')'. "rn ";
$ Array. = ") rn?> ";
File_put_contents ("data. php", $ array );
}

Public function add_wirte ($ rs)
{
$ Array = "<? Phprn ";
$ Array. = '$ class = array'. "rn (rn ";
Foreach ($ rs as $ key => $ value)
{
$ Array. = "rn ";
$ Array. = '"'. $ key. '" => array'. "rn ";
$ Array. = '('. "rn ";
$ Array. = '"sortname" => "'. $ value [" sortname "]. '"'. ", rn ";
$ Array. = '"sortlevel" => "'. $ value [" sortlevel "]. '"'. "rn ";
$ Array. = '),';
}
$ Array = substr ($ array, 0,-1 );
$ Array. = "rn) rn?> ";
File_put_contents ("data. php", $ array );
}
}


$ Cat = new cat ();
If ($ _ GET ["action"] = "add ")
{
If (strlen ($ _ POST ["sortname"]) <2)
{
Echo '<script language = "JavaScript"> alert ("add category name") </script> ';
Echo '<script language = "JavaScript"> location. href = "/cat. php? Action = tpl "</script> ';
Exit;
}
If (file_exists ("data. php "))
{
$ Cat-> add_cat ($ _ POST ["sortname"], $ _ POST ["sortlevel"]);
Echo '<script language = "JavaScript"> alert ("added successfully") </script> ';
Echo '<script language = "JavaScript"> location. href = "/cat. php" </script> ';
Exit;
}
Else
{
$ Cat-> wirte ($ _ POST ["sortname"], $ _ POST ["sortlevel"]);
Echo '<script language = "JavaScript"> alert ("added successfully") </script> ';
Echo '<script language = "JavaScript"> location. href = "/cat. php" </script> ';
Exit;
Exit;
}
}

If ($ _ GET ["action"] = "tpl ")
{
Echo '<form id = "form1" name = "form1" method = "post" action = "cat. php? Action = add "> ';" rn ";
Echo '<select name = "sortlevel">'. "rn ";
Echo '<option value = "" selected = "selected"> root Category </option>'. "rn ";
Foreach ($ cat-> orders () as $ val)
{
Echo '<option value = "'. $ val [" sortlevel "]. '"> ';
$ Clevel = strlen (substr ($ val ['sortlevel'], 0,-3 ));
For ($ I = 0; $ I <$ clevel; $ I ++)
{
Echo "-";
}
Echo $ val ['sortname']. "</option> rn ";
}
Echo "</select> rn ";
Echo '<input name = "sortname" type = "text" id = "sortname"/>'. "rn ";
Echo '<input type = "submit" name = "Submit" value = "submit"/> ';
Echo "</form> ";
Exit;
}

Foreach ($ cat-> orders () as $ value)
{
$ Level = strlen (substr ($ value ['sortlevel'], 0,-3 ));
For ($ I = 0; $ I <$ level; $ I ++)
{
Echo "-";
}
Echo $ value ["sortname"];
Echo "<br> ";
}
?>