我正在尝试使用PHP解析以下JSON，但在最后一级（"bank"）出现了一些问题，以下是信息：
JSON：
{
"loan": {
"fu": "1046",
"vb": "84",
"loan_type": "1",
"type_cocg": "14",
"meeting_place": "PLACE",
"meeting_date": "2019-05-29",
"creation_date": "2019-05-29 12:49:53",
"user_id": "1001-1556",
"member": [{
"mem_id": "1",
"name": "FIRST MEMBER",
"parentage": "PARENTAGE",
"cnic": "3393399393393",
"gender": "1",
"dob": "1994-05-29",
"marital_status": "1",
"spouse_name": "SPOUSE",
"spouse_cnic": "9939439939393",
"pres_address": "PRES ADDRESS",
"perma_address": "PERMA ADDRESS",
"mother_name": "MOTHER NAME",
"cell": "94494944949",
"loan_amount": "30000",
"network": "1",
"sim_ownership": "2",
"co_status": "3",
"occupation_category": "2",
"agri_occ": "null",
"nonagri_occ": "3",
"education": "1",
"disability": "2",
"religion": "6",
"head": "2",
"purpose": "2",
"repayment_mode": "null",
"duration": "4",
"purpose_ent": "null",
"purpose_agri": "null",
"area_unit": "2",
"agri_investment": "",
"agri_expense": "",
"purpose_livestock": "3",
"loan_id_mem": "1",
"monthly_income": "15000",
"monthly_expense": "2000",
"monthly_saving": "13000",
"yearly_saving": "156000",
"male": "2",
"female": "2",
"children": "2",
"cow": "2",
"buffalo": "2",
"goat": "2",
"sheep": "2",
"agri_area_unit": "1",
"land_own": "3",
"land_lease": "3",
"house_own": "3",
"house_rent": "3",
"caste": "CASTE",
"active_loan": "1",
"bank": [{
"id": "1",
"loan_id": "1",
"loan_mem_id": "1",
"bank_id": "1",
"bank_loan": "",
"bank_remaining": "2000",
"purpose": "1",
"purpose_agri": "16",
"purpose_livestock": "null",
"purpose_ent": "null"
}, {
"id": "2",
"loan_id": "1",
"loan_mem_id": "1",
"bank_id": "6",
"bank_loan": "",
"bank_remaining": "500",
"purpose": "3",
"purpose_agri": "16",
"purpose_livestock": "null",
"purpose_ent": "14"
}]
}, {
"mem_id": "2",
"name": "SECOND MEMBER",
"parentage": "PARENTAGE",
"cnic": "3939939393399",
"gender": "1",
"dob": "1994-05-29",
"marital_status": "1",
"spouse_name": "SPOUSE",
"spouse_cnic": "4949949494999",
"pres_address": "ADDRESS",
"perma_address": "ADDRESS",
"mother_name": "MOTHER",
"cell": "49494949494",
"loan_amount": "20000",
"network": "1",
"sim_ownership": "2",
"co_status": "2",
"occupation_category": "2",
"agri_occ": "null",
"nonagri_occ": "2",
"education": "1",
"disability": "1",
"religion": "1",
"head": "1",
"purpose": "1",
"repayment_mode": "null",
"duration": "3",
"purpose_ent": "null",
"purpose_agri": "16",
"area_unit": "1",
"agri_investment": "1500",
"agri_expense": "2000",
"purpose_livestock": "3",
"loan_id_mem": "1",
"monthly_income": "15000",
"monthly_expense": "200",
"monthly_saving": "14800",
"yearly_saving": "177600",
"male": "0",
"female": "0",
"children": "2",
"cow": "2",
"buffalo": "2",
"goat": "2",
"sheep": "2",
"agri_area_unit": "1",
"land_own": "3",
"land_lease": "3",
"house_own": "3",
"house_rent": "2",
"caste": "CASTE 2",
"active_loan": "1",
"bank": [{
"id": "3",
"loan_id": "1",
"loan_mem_id": "2",
"bank_id": "6",
"bank_loan": "",
"bank_remaining": "300",
"purpose": "1",
"purpose_agri": "43",
"purpose_livestock": "null",
"purpose_ent": "null"
}]
}]
}
}
PHP代码：
$json = json_decode($content, true);
$json['loan']['fu']; // This works !
foreach($json['loan']['member'] as $item) {
$name = $item['name']; // This works !
foreach($json['loan']['member']['bank'] as $bank_item) { // THIS DOES NOT WORKS!
}
}
最后一个foreach循环给出了错误消息：
注意：未定义索引：银行
是否有任何线索可能导致问题的原因，或者是否有改进的解析相同JSON的方法，这将非常有帮助。
答案 0 :(得分：2)
您的json解析很好。您的访问缺少索引。
由于“银行”位于“成员”数组中，因此您应以$json['loan']['member'][0]['bank']的身份访问（0是硬编码的-您也可以切换为1）。
如果用于，则应该这样做：
foreach($json['loan']['member'] as $item) {
$name = $item['name']; // This works !
foreach($item['bank'] as $bank_item) { // use $item
}
}
答案 1 :(得分：1)
仅使用一个foreach()并获取bank元素值。如果您还需要循环使用bank元素，则可以使用另一个foreach()
$json = json_decode($content, true);
foreach($json['loan']['member'] as $item) {
print_r($item['bank']);
foreach($item['bank'] as $bank_item) {
echo $bank_item;
}
}
答案 2 :(得分：0)
您已经错过了该成员也是多维数组
$json = json_decode($content, true);
/*
echo "<pre>";
print_r($json);
echo "</pre>";*/
foreach($json['loan']['member'] as $item => $value) {
$name = $value['name']; // This works !
foreach($json['loan']['member'][$item]['bank'] as $bank_item) { // THIS DOES NOT WORKS!
print_r($bank_item);
}
}
答案 3 :(得分：0)
您也可以使用array_walk_recursive()功能
$json = json_decode($content, true);
$i=0;
foreach($json['loan']['member'] as $item) {
array_walk_recursive($json['loan']['member'][$i]['bank'], function($value,$key) {
echo $key.' :'.$value ." \n";
});
$i++;
}