Use PHP arrays to implement an infinite assortment without using a database and recursion. _php Tips

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<?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 = "&LT;?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 = "&LT;?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 ("Please 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 ("Add Success") </script> ';
Echo ' <script language= "JavaScript" >location.href= "/cat.php" </script>;
Exit
}
Else
{
$cat->wirte ($_post["Sortname"],$_post["Sortlevel"));
Echo ' <script language= "JavaScript" >alert ("Add Success") </script> ';
Echo ' <script language= "JavaScript" >location.href= "/cat.php" </script>;
Exit
Exit
}
}

if ($_get["action"] = = "TPL")
{
Echo ' <form id= "Form1" Name= "Form1" method= "Post" action= "Cat.php?action=add" > ";" RN ";
Echo ' <select name= ' sortlevel ' > '. RN ";
Echo ' <option value= ' "selected=" selected "> Root classification </option> '." RN ";
foreach ($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= "Submission" value= "submitted"/> ";
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>";
}
?>