PHP algorithm for classifying and sorting regions

WBOY
Release: 2016-07-25 09:07:41
Original
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  1. $array = array(
  2. 0=>array("","Hebei"),
  3. 1=>array("","Beijing"),
  4. 2=> array(0,"Baoding"),
  5. 3=>array(1,"Haidian"),
  6. 4=>array(3,"Zhongguancun"),
  7. 5=>array(2,"Zhuozhou")
  8. );
  9. ?>
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and return the following results after processing: Hebei -Baoding --Zhuozhou Beijing -Haidian --Zhongguancun

Algorithm code:

  1. function typeArray($array){
  2. $con = null;
  3. foreach ($array as $k=>$v){
  4. $na[$k] = is_numeric($ v[0]) ? $na[$v[0]].$k."|" : $k."|";
  5. }
  6. asort($na); //Sort
  7. foreach ($na as $k =>$v){
  8. $s = substr_count($v,"|");
  9. $con .= str_repeat("-",($s-1)).$array[$k][1]. "n";
  10. }
  11. return $con;
  12. }
  13. ?>
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source:php.cn
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