json 파싱연습

json 파싱연습 

잊지 않기 위한 반복 훈련 

 

 

<?php
$json = '[{"country":"Afghanistan","population":"35530081"},{"country":"Albania","population":"2930187"},{"country":"Algeria","population":"41318142"},{"country":"American Samoa","population":"55641"},{"country":"Andorra","population":"76965"},{"country":"Angola","population":"29784193"},{"country":"Anguilla","population":"14909"},{"country":"Antarctica","population":null},{"country":"Antigua and Barbuda","population":"102012"},{"country":"Argentina","population":"44271041"},{"country":"Armenia","population":"2930450"},{"country":"Aruba","population":"105264"},{"country":"Australia","population":"24450561"},{"country":"Austria","population":"8735453"},{"country":"Azerbaijan","population":"9827589"},{"country":"Bahamas","population":"395361"},{"country":"Bahrain","population":"1492584"},{"country":"Bangladesh","population":"164669751"},{"country":"Barbados","population":"285719"},{"country":"Belarus","population":"9468338"},{"country":"Belgium","population":"11429336"},{"country":"Belize","population":"374681"},{"country":"Benin","population":"11175692"},{"country":"Bermuda","population":"61349"},{"country":"Bhutan","population":"807610"},{"country":"Bolivia","population":"11051600"},{"country":"Bosnia and Herzegovina","population":"3507017"},{"country":"Botswana","population":"2291661"},{"country":"Bouvet Island","population":null},{"country":"Brazil","population":"209288278"},{"country":"British Indian Ocean Territory","population":null},{"country":"Brunei","population":"428697"},{"country":"Bulgaria","population":"7084571"},{"country":"Burkina Faso","population":"19193382"},{"country":"Burundi","population":"10864245"},{"country":"Cambodia","population":"16005373"},{"country":"Cameroon","population":"24053727"},{"country":"Canada","population":"36624199"},{"country":"Cape Verde","population":"546388"},{"country":"Cayman Islands","population":"61559"},{"country":"Central African Republic","population":"4659080"},{"country":"Chad","population":"14899994"},{"country":"Chile","population":"18054726"},{"country":"China","population":"1409517397"},{"country":"Christmas Island","population":"2500"},{"country":"Cocos (Keeling) Islands","population":"600"},{"country":"Colombia","population":"49065615"},{"country":"Comoros","population":"813912"},{"country":"Congo","population":"5260750"},{"country":"Cook Islands","population":"17380"},{"country":"Costa Rica","population":"4905769"},{"country":"Croatia","population":"4189353"},{"country":"Cuba","population":"11484636"},{"country":"Cyprus","population":"1179551"},{"country":"Czech Republic","population":"10618303"},{"country":"Denmark","population":"5733551"},{"country":"Djibouti","population":"956985"},{"country":"Dominica","population":"73925"},{"country":"Dominican Republic","population":"10766998"},{"country":"East Timor","population":"1296311"},{"country":"Ecuador","population":"16624858"},{"country":"Egypt","population":"97553151"},{"country":"El Salvador","population":"6377853"},{"country":"England","population":null},{"country":"Equatorial Guinea","population":"1267689"},{"country":"Eritrea","population":"5068831"},{"country":"Estonia","population":"1309632"},{"country":"Ethiopia","population":"104957438"},{"country":"Falkland Islands","population":"2910"},{"country":"Faroe Islands","population":"49290"},{"country":"Fiji Islands","population":"905502"},{"country":"Finland","population":"5523231"},{"country":"France","population":"64979548"},{"country":"French Guiana","population":"282731"},{"country":"French Polynesia","population":"283007"},{"country":"French Southern territories","population":null},{"country":"Gabon","population":"2025137"},{"country":"Gambia","population":"2100568"},{"country":"Georgia","population":"3912061"},{"country":"Germany","population":"82114224"},{"country":"Ghana","population":"28833629"},{"country":"Gibraltar","population":"34571"},{"country":"Greece","population":"11159773"},{"country":"Greenland","population":"56480"},{"country":"Grenada","population":"107825"},{"country":"Guadeloupe","population":"449568"},{"country":"Guam","population":"164229"},{"country":"Guatemala","population":"16913503"},{"country":"Guinea","population":"12717176"},{"country":"Guinea-Bissau","population":"1861283"},{"country":"Guyana","population":"777859"},{"country":"Haiti","population":"10981229"},{"country":"Heard Island and McDonald Islands","population":null},{"country":"Holy See (Vatican City State)","population":"1000"},{"country":"Honduras","population":"9265067"},{"country":"Hong Kong","population":"7364883"},{"country":"Hungary","population":"9721559"},{"country":"Iceland","population":"335025"},{"country":"India","population":"1339180127"},{"country":"Indonesia","population":"263991379"},{"country":"Iran","population":"81162788"},{"country":"Iraq","population":"38274618"},{"country":"Ireland","population":"4761657"},{"country":"Israel","population":"8321570"},{"country":"Italy","population":"59359900"},{"country":"Ivory Coast","population":"24294750"},{"country":"Jamaica","population":"2890299"},{"country":"Japan","population":"127484450"},{"country":"Jordan","population":"9702353"},{"country":"Kazakhstan","population":"18204499"},{"country":"Kenya","population":"49699862"},{"country":"Kiribati","population":"116398"},{"country":"Kuwait","population":"4136528"},{"country":"Kyrgyzstan","population":"6045117"},{"country":"Laos","population":"6858160"},{"country":"Latvia","population":"1949670"},{"country":"Lebanon","population":"6082357"},{"country":"Lesotho","population":"2233339"},{"country":"Liberia","population":"4731906"},{"country":"Libyan Arab Jamahiriya","population":"5605000"},{"country":"Liechtenstein","population":"37922"},{"country":"Lithuania","population":"2890297"},{"country":"Luxembourg","population":"583455"},{"country":"Macao","population":"473000"},{"country":"North Macedonia","population":"2024000"},{"country":"Madagascar","population":"25570895"},{"country":"Malawi","population":"18622104"},{"country":"Malaysia","population":"31624264"},{"country":"Maldives","population":"436330"},{"country":"Mali","population":"18541980"},{"country":"Malta","population":"430835"},{"country":"Marshall Islands","population":"53127"},{"country":"Martinique","population":"384896"},{"country":"Mauritania","population":"4420184"},{"country":"Mauritius","population":"1265138"},{"country":"Mayotte","population":"253045"},{"country":"Mexico","population":"129163276"},{"country":"Micronesia, Federated States of","population":null},{"country":"Moldova","population":"4051212"},{"country":"Monaco","population":"38695"},{"country":"Mongolia","population":"3075647"},{"country":"Montserrat","population":"5177"},{"country":"Morocco","population":"35739580"},{"country":"Mozambique","population":"29668834"},{"country":"Myanmar","population":"53370609"},{"country":"Namibia","population":"2533794"},{"country":"Nauru","population":"11359"},{"country":"Nepal","population":"29304998"},{"country":"Netherlands","population":"17035938"},{"country":"Netherlands Antilles","population":"217000"},{"country":"New Caledonia","population":"276255"},{"country":"New Zealand","population":"4705818"},{"country":"Nicaragua","population":"6217581"},{"country":"Niger","population":"21477348"},{"country":"Nigeria","population":"190886311"},{"country":"Niue","population":"1618"},{"country":"Norfolk Island","population":"2000"},{"country":"North Korea","population":"25490965"},{"country":"Northern Ireland","population":null},{"country":"Northern Mariana Islands","population":"55144"},{"country":"Norway","population":"5305383"},{"country":"Oman","population":"4636262"},{"country":"Pakistan","population":"197015955"},{"country":"Palau","population":"21729"},{"country":"Palestine","population":"4920724"},{"country":"Panama","population":"4098587"},{"country":"Papua New Guinea","population":"8251162"},{"country":"Paraguay","population":"6811297"},{"country":"Peru","population":"32165485"},{"country":"Philippines","population":"104918090"},{"country":"Pitcairn","population":"50"},{"country":"Poland","population":"38170712"},{"country":"Portugal","population":"10329506"},{"country":"Puerto Rico","population":"3663131"},{"country":"Qatar","population":"2639211"},{"country":"Reunion","population":"699000"},{"country":"Romania","population":"19679306"},{"country":"Russian Federation","population":"143989754"},{"country":"Rwanda","population":"12208407"},{"country":"Saint Helena","population":"4049"},{"country":"Saint Kitts and Nevis","population":"55345"},{"country":"Saint Lucia","population":"178844"},{"country":"Saint Pierre and Miquelon","population":"6320"},{"country":"Saint Vincent and the Grenadines","population":"109897"},{"country":"Samoa","population":"196440"},{"country":"San Marino","population":"33400"},{"country":"Sao Tome and Principe","population":"204327"},{"country":"Saudi Arabia","population":"32938213"},{"country":"Scotland","population":null},{"country":"Senegal","population":"15850567"},{"country":"Seychelles","population":"94737"},{"country":"Sierra Leone","population":"7557212"},{"country":"Singapore","population":"5708844"},{"country":"Slovakia","population":"5447662"},{"country":"Slovenia","population":"2079976"},{"country":"Solomon Islands","population":"611343"},{"country":"Somalia","population":"14742523"},{"country":"South Africa","population":"56717156"},{"country":"South Georgia and the South Sandwich Islands","population":null},{"country":"South Korea","population":"50982212"},{"country":"South Sudan","population":"12575714"},{"country":"Spain","population":"46354321"},{"country":"SriLanka","population":"20876917"},{"country":"Sudan","population":"40533330"},{"country":"Suriname","population":"563402"},{"country":"Svalbard and Jan Mayen","population":"3200"},{"country":"Swaziland","population":"1008000"},{"country":"Sweden","population":"9910701"},{"country":"Switzerland","population":"8476005"},{"country":"Syria","population":"18269868"},{"country":"Tajikistan","population":"8921343"},{"country":"Tanzania","population":"57310019"},{"country":"Thailand","population":"69037513"},{"country":"The Democratic Republic of Congo","population":null},{"country":"Togo","population":"7797694"},{"country":"Tokelau","population":"1300"},{"country":"Tonga","population":"108020"},{"country":"Trinidad and Tobago","population":"1369125"},{"country":"Tunisia","population":"11532127"},{"country":"Turkey","population":"80745020"},{"country":"Turkmenistan","population":"5758075"},{"country":"Turks and Caicos Islands","population":"35446"},{"country":"Tuvalu","population":"11192"},{"country":"Uganda","population":"42862958"},{"country":"Ukraine","population":"44222947"},{"country":"United Arab Emirates","population":"9400145"},{"country":"United Kingdom","population":"66181585"},{"country":"United States","population":"324459463"},{"country":"United States Minor Outlying Islands","population":null},{"country":"Uruguay","population":"3456750"},{"country":"Uzbekistan","population":"31910641"},{"country":"Vanuatu","population":"276244"},{"country":"Venezuela","population":"31977065"},{"country":"Vietnam","population":"95540800"},{"country":"Virgin Islands, British","population":null},{"country":"Virgin Islands, U.S.","population":null},{"country":"Wales","population":null},{"country":"Wallis and Futuna","population":"11773"},{"country":"Western Sahara","population":"552628"},{"country":"Yemen","population":"28250420"},{"country":"Yugoslavia","population":"10640000"},{"country":"Zambia","population":"17094130"},{"country":"Zimbabwe","population":"16529904"}]';



// 이름이 가장 긴 나라의 이름을 내어주세요
//"이름이름이름이름이름"South Georgia and the South Sandwich Islands

// $parse = json_decode($json, true);

// $sum = 0;
// $tmp = 0;
// for ($i = 0; $i < count($parse); $i++) {
//     if ($sum < strlen($parse[$i]["country"])) {
//         $sum = strlen($parse[$i]["country"]);
//         $tmp = $parse[$i]["country"];
//     }
// }

// echo $tmp;






// population이 100만 이하인 나라의 수를 내어주세요 해결
// $parse = json_decode($json, true);
// $sum = 0;
// for ($i = 0; $i < count($parse); $i++) {
//     if ($parse[$i]["population"] < 1000000) {
//         $sum = $sum + 1;
//     }
// }
// echo $sum;



// population이 1억 이상인 나라의 목록을 아래와 같이 만들어주세요 해결
// ["China", "India", "United States"]
// $parse=json_decode($json);

// for($i=0;$i<count($parse);$i++){
// if($parse[$i]->population>100000000){
// echo $parse[$i]->country;
// echo "<br>";
// }
// }



// 북한, 남한 인구를 합해주세요 해결
//76473177
//echo $parse[0][1];
//print_r($parse);
//echo $parse[1];
//25490965   50982212
//$parse=json_decode($json,true);
// for($i=0;$i<count($parse);$i++){
// if($parse[$i]["country"]=="South Korea" ){
//      $j= $parse[$i]["population"];
// }else{
//     if($parse[$i]["country"]=="North Korea" )
//      $x= $parse[$i]["population"];
// }
// }
// echo $j+$x;





// 북한, 남한 인구 합한것보다 많은 인구의 나라 목록을 아래와같이 만들어주세요  해결
//["China", "India", "United States"]

// $parse = json_decode($json,true);

//  for($i=0;$i<count($parse);$i++){
// if($parse[$i]["country"]=="South Korea" ){
//      $j= $parse[$i]["population"];
// }else{
//     if($parse[$i]["country"]=="North Korea" )
//      $x= $parse[$i]["population"];
// }
// }
// $z=$j+$x;
// for($i=0;$i<count($parse);$i++)
// if($parse[$i]["population"]>$z){
//     echo $parse[$i]["country"];
//     echo "<br>";
// }