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  1.         <?php
  2.  
  3. $locations = array ( 
  4.     Array ( 
  5.                     "L1ID" => 2 ,
  6.                     "L1Location" => 'USA' ,
  7.                     "L2ID" => 3 ,
  8.                     "L2Location" => 'New York',
  9.                     "L3ID" => 4 ,
  10.                     "L3Location" => 'Manhanttan',
  11.                 ) ,
  12.     Array (  
  13.                     "L1ID" => 2 ,
  14.                     "L1Location" => 'USA' ,
  15.                     "L2ID" => 8 ,
  16.                     "L2Location" => 'New Jersey' ,
  17.                     "L3ID" => 7 ,
  18.                     "L3Location" => 'Bergen County',
  19.                 ) ,
  20.  
  21.     Array ( 
  22.                     "L1ID" => 5 ,
  23.                     "L1Location" => 'Canada' ,
  24.                     "L2ID" => 12,
  25.                     "L2Location" => 'Ontario' ,
  26.                     "L3ID" => 50,
  27.                     "L3Location" => 'Toronto' ,
  28.                 ) ,
  29.     Array ( 
  30.                     "L1ID" => 6 ,
  31.                     "L1Location" => 'South Korea',
  32.                     "L2ID" => 22,
  33.                     "L2Location" => 'Gyungido' ,
  34.                     "L3ID" => 25,
  35.                     "L3Location" => 'Buchon',
  36.                 ) ,
  37.     );
  38.             $countries = array();
  39.             $states = array();
  40.             $cities = array();
  41.             foreach ($locations as $location) {
  42.                 if(!array_key_exists($location['L1ID'], $countries))
  43.                     $countries[$location['L1ID']] = array(
  44.                         'name' => $location['L1Location'],
  45.                         'states' => array(),
  46.                     );
  47.                 if(!array_key_exists($location['L2ID'], $countries[$location['L1ID']]['states'])){
  48.                     $countries[$location['L1ID']]['states'][$location['L2ID']] = array(
  49.                         'name' => $location['L2Location'],
  50.                         'cities' => array(),
  51.                     );
  52.                 }
  53.                 if(!array_key_exists($location['L3ID'], $countries[$location['L1ID']]['states'][$location['L2ID']])){
  54.                     $countries[$location['L1ID']]['states'][$location['L2ID']]['cities'][$location['L3ID']] = $location['L3Location'];
  55.                 }
  56.             }
  57.  
  58.             // Generate $countries box
  59.             foreach ($countries as $key => $country) {
  60.                 echo ($key.'<BR>'."\n");
  61.                 echo '<option value="' . $key . '">' . $country['name'].'</option>'."\n";
  62.  
  63.                 // Generate $states box
  64.                 foreach ($country['states'] as $key => $state) {
  65.                     echo ($key.'<BR>'."\n");
  66.                     echo '<option value="' . $key . '">' . $state['name'].'</option>'."\n";
  67.  
  68.                     // Generate $city box
  69.                     foreach ($state['cities'] as $key => $city) {
  70.                         echo ($key.'<BR>'."\n");
  71.                         echo '<option value="' . $key . '">' . $city.'</option>'."\n";
  72.                     }
  73.  
  74.                 }
  75.  
  76.             }
  77.  
  78.         ?>
  79.  
Success #stdin #stdout 0.03s 13112KB
comments (?)
stdin 
Standard input is empty
stdout 
        2<BR>
<option value="2">USA</option>
3<BR>
<option value="3">New York</option>
4<BR>
<option value="4">Manhanttan</option>
8<BR>
<option value="8">New Jersey</option>
7<BR>
<option value="7">Bergen County</option>
5<BR>
<option value="5">Canada</option>
12<BR>
<option value="12">Ontario</option>
50<BR>
<option value="50">Toronto</option>
6<BR>
<option value="6">South Korea</option>
22<BR>
<option value="22">Gyungido</option>
25<BR>
<option value="25">Buchon</option>
https://ideone.com/TqbpY
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
public

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