PHP Infinite Classification Tree Data format Code Examples of detailed

This article mainly introduces the PHP infinite classification of tree data format code, the need for friends can refer to the following

The original code:

function Gentree ($items, $id = ' id ', $pid = ' pid ', $son = ' children ') {$tree = array ();//formatted Tree $TMPMAP = Array ();//Temporary flat data  foreach ($items as $item) {$tmpMap [$item [$id]] = $item; } foreach ($items as $item) {if (Isset ($tmpMap [$item [$pid]]) {$tmpMap [$item [$pid]][$son] = & $tmpMap [$    item[$id]];    } else {$tree [] = & $tmpMap [$item [$id]];  }} unset ($TMPMAP); return $tree;} $items 1 = array (' id ' = = 1, ' pid ' = = 0, ' name ' = ' one '), array (' id ' = = ', ' pid ' = = 0, ' name ' ' + ' (' = '), array (' id ' = = 2, ' pid ' = + 1, ' name ' = ' two ') ', array (' id ' = ' = ', ' pid ' = ' = ', ' NA Me ' + ' two '), array (' id ' = = 3, ' pid ' = + 1, ' name ' = ' two '), array (' id ' = +, ' pid ' = 11, ' Name ' = = ' two '), array (' id ' = = 9, ' pid ' = 1, ' name ' = ' two '), array (' id ' = +, ' pid ' = + 1, ' Name ' = ' two '), array (' id ' = = 4, ' pid ' = 9, ' name ' = ' three '), array (' ID ' =&Gt 6, ' pid ' = + 9, ' name ' = ' three '), array (' id ' = = 7, ' pid ' = 4, ' name ' = ' four '), array (' id ' = 8, ' pid ' = + 4, ' name ' = ' four '), array (' id ' = = 5, ' pid ' = 4, ' name ' = ' four '), array (' id ' = The ' pid ' = 4, ' name ' = ' four ', array (' id ' = +, ' pid ' = 8, ' name ' = ' five ') ', array (' ID ' =&gt ; +, ' pid ' = 8, ' name ' + ' five-level '), array (' id ' = ' = ', ' pid ' = 8, ' name ' = ' five '), array (' ID ' =&gt ; , ' pid ' = +, ' name ' = ' Six level 64 '); Var_dump (Gentree ($items 1));

Here are the additions:

/** * This method is provided by @tonton * http://my.oschina.net/u/918697 * @date 2012-12-12 */function genTree5 ($items) {  foreach ($items As $item)    $items [$item [' pid ']][' son '] [$item [' id ']] = & $items [$item [' id ']];  return Isset ($items [0][' son '])? $items [0][' son ']: Array ();}

/** * Format data into a tree structure * @author xuefen.tong * @param array $items * @return array */function genTree9 ($items) {$tree = array (); Well-formatted tree foreach ($items as $item) if (Isset ($items [$item [' pid]]) $items [$item [' pid ']][' son '] = & $items [$    item[' id '];  else $tree [] = & $items [$item [' id ']]; return $tree;} $items = array (' id ' = = 1, ' pid ' = 0, ' name ' = ' Jiangxi '), 2 = = Array (' id ' = = 2, ' pid ' = 0, ' name ' = ' Heilongjiang Province '), 3 = = Array (' id ' = 3, ' pid ' = = 1, ' name ' = ' Nanchang '), 4 = = Array (' id ' = = 4, ' pi d ' + 2, ' name ' = ' Harbin City '), 5 = = Array (' id ' = 5, ' pid ' = = 2, ' name ' = ' Jixi '), 6 = = Array (' ID ' =&G T 6, ' pid ' = 4, ' name ' = = ' Xiangfang District '), 7 = = Array (' id ' = = 7, ' pid ' = 4, ' name ' = ' Nangang '), 8 = = Array (' ID  ' = = 8, ' pid ' = 6, ' name ' = ' and Hing Road '), 9 = = Array (' id ' = = 9, ' pid ' = 7 ', ' name ' = ' West big straight Street '), ten = Array (' id ' = +, ' pid ' = + 8, ' name ' = ' Northeast Forestry University '), An array (' id ' = ' + ', ' pid ' = 9, ' name ' = ' Harbin Institute of Technology '), and array (' id ' = ' + ', ' pid ' = 8, ' name ' = = ' harbin Normal University '), and the array (' id ' = ' + ', ' pid ' = 1, ' name ' = ' Ganzhou '), + = array (' id ' = + ' pid ' = + ', ' name ' = ' Gan County '), and the array (' id ' = +, ' pid ' = ' + '), ' name ' = ' Yudu County '), + = array (' id ' = >, ' pid ' = +, ' name ' and ' Mao Dian Zhen ', ' the ' id ' = ' + ', ' pid ' = ' + ', ' name ' = ' Ota township ' ; Array (' id ' = +, ' pid ' = + ', ' name ' = ' righteousness village '), ' + ' array (' id ' = ' + ', ' pid ' = ' + '), ' name ' = ' ' Shang Ba Village ' '),;p Rint_r (GenTree5 ($items));p Rint_r (GenTree9 ($items));//The latter output format, the former similar, but the array key value is not the same, but does not affect the data structure/*array ([0] =          Array ([id] = 1 [PID] + 0 [name] = = Jiangxi [son] + array ([0] = = Array          ([ID] + 3 [pid] = 1 [name] = Nanchang) [1] = = Array         ([id] = 13   [PID] = 1 [name] = = Ganzhou [son] = = Array ([0] = = Array                    ([id] = [pid] = [Name] = + Gan County                          [Son] = array ([0] = = Array (                          [ID] [PID] = [name] + Mao Dian Zhen                              [Son] = array ([0] = = Array                              ([id] + [pid] = 16                              [Name] and righteousness source village) [1] = = Array                              ([id] + [pid] = 16 [Name] = Shang BaVillage))) [1] = A                          Rray ([id] [+] [pid] = 14 [Name] = Ota township)) [1] =&gt ; Array ([id] = [pid] = [Name] =&gt ; Yudou County))) [1] = = Array ([id] + 2 [pid] = 0 [nam  E] = Heilongjiang province [son] + array ([0] = = Array ([ID] + 4 [pid] = =                  2 [Name] = Harbin City [son] = array ([0] = = Array ( [id] = 6 [PID] + 4 [name] + Xiangfang District [son] =&gt ;             Array       ([0] = = Array ([id] = 8                          [PID] = 6 [name] = and Xing Lu [son] = Array                              ([0] = = Array ([id] = 10                              [PID] = 8 [name] = Northeast Forestry University                              ) [1] = = Array (                              [ID] [PID] + 8 [name] = =                     Harbin Normal University)) )) [1] = = Array ([id] = 7 [            PID] = 4      [Name] = Nangang District [son] = array ([0] = = Array                       ([id] = 9 [PID] + 7 [name] = West Tai Straight Street                          [Son] = array ([0] = = Array ([id] = [pid] = 9 [name] =&G                           T                 Harbin Institute of Technology)))            ))) [1] = = Array ([id] + 5 [pid] = 2 [Name] = Jixi))) */

Extremely simple and effective!!! Very good!

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