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Unlimited categories, query data from database, recursively perform custom sorting in arrays

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Release： 2016-07-25 09:02:08
Original
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Unlimited classification, querying data from the database, and recursively performing custom sorting in the array. I also realized that there are many shortcomings and they are not handled well. There may be a better way. Let's discuss it together. It's more than 100 lines. Not all
  1. class Tree{
  2. protected $arr = array(); //Sort array
  3. protected $info = array(); //Storage error information
  4. protected $tree = array(); //Storage generated class array
  5. protected $flag = true; //Flag bit
  7. public function __construct()
  8. {
  10. }
  11. //Get data
  12. public function data($fid,$arr)
  13. {
  14. $this->checkArr($arr );
  15. $this->checking();
  16. $this->chindAll($fid);
  17. return $this->tree;
  18. }
  20. //Judge whether the parameters meet the requirements
  21. protected function checkArr($ val)
  22. {
  23. static $num = 0;
  24. if(is_array($val)){
  25. foreach($val as $Varr){
  26. $this->isKeyVal('id', $Varr, $num);
  27. $this->isKeyVal('parentid', $Varr, $num);
  28. $this->isKeyVal('name', $Varr, $num);
  29. $num++;
  30. }
  31. }
  32. $this- >arr = $val;
  33. }
  34. //Whether the stored id is an array
  35. protected function checkNum($val)
  36. {
  37. if(!is_numeric($val)){
  38. $this->info[] = ' The incoming parameter '.$val.' is not a numerical value';
  39. $this->flag = false;
  40. $this->checking();
  41. }
  42. }
  43. //Verification, output error message
  44. protected function checking( ){
  45. if(!$this->flag){
  46. echo '
    ';
  47. var_dump($this->info);
  48. exit();
  49. }
  50. }
  52. //Judge array key Whether it exists and whether it has a value
  53. protected function isKeyVal($key, $arr, $num)
  54. {
  55. if(!array_key_exists($key, $arr))
  56. {
  57. $this->info[] = $num. 'Array key'.$key.'does not exist';
  58. $this->flag = false;
  60. }
  61. }
  63. //Get the son
  64. public function getChind($fid)
  65. {
  66. static $num = 0 ;
  67. $arr = array();
  68. $this->checkNum($fid);
  69. foreach($this->arr as $key=>$row){
  70. if( $row['parentid'] == $fid){
  71. $arr[] = $row;
  72. unset($this->arr[$key]);
  73. }
  74. }
  75. if(!empty($arr)){
  76. $num++;
  77. return $this->sortArr($arr);
  78. }else{
  79. return null;
  80. }
  81. }
  83. //Get my son and grandson
  84. public function chindAll($fid,$input=null)
  85. {
  86. static $ n =0;
  87. $n++;
  88. $arr = $this->getChind($fid);
  89. if(!empty($arr)){
  90. $count = count($arr);
  91. if(empty($ input)){
  92. for($i=0; $i<$count ;$i++){
  93. $this->tree[$i] = $arr[$i];
  94. }
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Related labels：
无限分类，从数据库查询数据 在数组中递归进行自定义排序
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