PHP Unlimited Classification [Enhanced Edition]

/** +------------------------------------------------ * Universal Tree Type +------------------------------------------------ * @author yangyunzhou@foxmail.com +------------------------------------------------ * @date November 23, 2010 10:09:31 +------------------------------------------------ */ Class Tree { /** +------------------------------------------------ * 2-dimensional array required to generate the tree structure +------------------------------------------------ * @author yangyunzhou@foxmail.com +------------------------------------------------ * @var Array */ var $arr = array (); /** +------------------------------------------------ * Create a tree structure with the necessary decoration symbols, can be converted to pictures +------------------------------------------------ * @author yangyunzhou@foxmail.com +------------------------------------------------ * @var Array */ var $icon = array (' │ ', ' ├ ', ' └ '); /** * @access Private */ var $ret = '; /** * Constructors, initializing classes * @param array of 2-D arrays, for example: * Array ( * 1 = = Array (' id ' = ' 1 ', ' ParentID ' =>0, ' name ' = ' first column one '), * 2 = = Array (' id ' = ' 2 ', ' ParentID ' =>0, ' name ' = ' "one column II '), * 3 = = Array (' id ' = ' 3 ', ' ParentID ' =>1, ' name ' = ' two ' column one '), * 4 = = Array (' id ' = ' 4 ', ' ParentID ' =>1, ' name ' = ' two ' column two '), * 5 = = Array (' id ' = ' 5 ', ' ParentID ' =>2, ' name ' = ' two ' column three '), * 6 = = Array (' id ' = ' 6 ', ' ParentID ' =>3, ' name ' = ' three ' column one '), * 7 = = Array (' id ' = ' 7 ', ' ParentID ' =>3, ' name ' = ' three ' level Column II ') * ) */ function tree ($arr =array ()) { $this->arr = $arr; $this->ret = "; Return Is_array ($arr); } /** * Get Parent Series Group * @param int * @return Array */ function Get_parent ($myid) { $newarr = Array (); if (!isset ($this->arr[$myid])) return false; $pid = $this->arr[$myid] [' ParentID ']; $pid = $this->arr[$pid] [' ParentID ']; if (Is_array ($this->arr)) { foreach ($this->arr as $id = $a) { if ($a [' parentid '] = = $pid) $newarr [$id] = $a; } } return $newarr; } /** * Get sub-series group * @param int * @return Array */ function Get_child ($myid) { $a = $newarr = Array (); if (Is_array ($this->arr)) { foreach ($this->arr as $id = $a) { if ($a [' parentid '] = = $myid) $newarr [$id] = $a; } } Return $newarr? $newarr: false; } /** * Get the current position array * @param int * @return Array */ function Get_pos ($myid,& $newarr) { $a = array (); if (!isset ($this->arr[$myid])) return false; $newarr [] = $this->arr[$myid]; $pid = $this->arr[$myid] [' ParentID ']; if (Isset ($this->arr[$pid])) { $this->get_pos ($pid, $newarr); } if (Is_array ($newarr)) { Krsort ($newarr); foreach ($newarr as $v) { $a [$v [' id ']] = $v; } } return $a; } /** * ------------------------------------- * Get tree-type structure * ------------------------------------- * @author yangyunzhou@foxmail.com * @param $myid means to get all the children under this ID * @param $str generate the basic code of the tree structure, for example: "\ $spacer \ $name " * @param $sid The selected ID, such as in the Tree drop-down box need to use * @param $adds * @param $str _group */ function Get_tree ($myid, $str, $sid = 0, $adds = ", $str _group =") { $number = 1; $child = $this->get_child ($myid); if (Is_array ($child)) { $total = count ($child); foreach ($child as $id = = $a) { $j = $k = "; if ($number = = $total) { $j. = $this->icon[2]; } else { $j. = $this->icon[1]; $k = $adds? $this->icon[0]: "; } $spacer = $adds? $adds. $j: "; $selected = $id = = $sid? ' Selected ': '; @extract ($a); $parentid = = 0 && $str _group? Eval ("\ $nstr = \" $str _group\ "): eval (" \ $nstr = \ "$str \"; "); $this->ret. = $nstr; $this->get_tree ($id, $str, $sid, $adds. $k. ", $str _group); $number + +; } } return $this->ret; } /** * Similar to the previous method, but allows multiple selections */ function Get_tree_multi ($myid, $str, $sid = 0, $adds = ") { $number = 1; $child = $this->get_child ($myid); if (Is_array ($child)) { $total = count ($child); foreach ($child as $id = $a) { $j = $k = "; if ($number = = $total) { $j. = $this->icon[2]; } Else { $j. = $this->icon[1]; $k = $adds? $this->icon[0]: "; } $spacer = $adds? $adds. $j: "; $selected = $this->have ($sid, $id)? ' Selected ': '; @extract ($a); Eval ("\ $nstr = \" $str \ ";"); $this->ret. = $nstr; $this->get_tree_multi ($id, $str, $sid, $adds. $k. "); $number + +; } } return $this->ret; } function has ($list, $item) { Return (Strpos (',, '. $list. ', ', ', '. $item. ', ')); } /** +------------------------------------------------ * Formatted array +------------------------------------------------ * @author yangyunzhou@foxmail.com +------------------------------------------------ */ function GetArray ($myid =0, $sid =0, $adds = ") { $number = 1; $child = $this->get_child ($myid); if (Is_array ($child)) { $total = count ($child); foreach ($child as $id = = $a) { $j = $k = "; if ($number = = $total) { $j. = $this->icon[2]; } else { $j. = $this->icon[1]; $k = $adds? $this->icon[0]: "; } $spacer = $adds? $adds. $j: "; @extract ($a); $a [' name '] = $spacer. ' '. $a [' name ']; $this->ret[$a [' id ']] = $a; $FD = $adds. $k. "; $this->getarray ($id, $sid, $FD); $number + +; } } return $this->ret; } } ?> Copy Code Usage: $tree = new Tree; Please remember to include the tree file before new! $tree->tree ($data); Please refer to the comments on the tree method for the data format! If you use an array, use the GetArray method $tree->getarray (); Drop-down menu options use the Get_tree method $tree->get_tree (); Copy Code

Enhanced version, PHP

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