我正在尝试将 json 字符串解析为 mysql，但我收到一条错误消息，提示 array_keys() 期望参数 1 为数组，第 58 行给出的值为空。
<?php
function array_value_recursive($key , $arr){
$val = array();
array_walk_recursive($arr, function ($v, $k) use($key, &$val){
if($k == $key) array_push($val, $v);
});
return count($val) > 1 ? $val : array_pop($val);
}
// get tag
$tag = $_POST['tag'];
// include db handler
require_once 'include/DB_Functions.php';
$db = new DB_Functions();
// response Array
$response = array("tag" => $tag, "error" => FALSE);
// check for tag type
if ($tag == 'register') {
// Request type is Register new user
$name = $_POST['UserName'];
$phone = $_POST['Phone'];
$date=$_POST['userAddedDate'];
$userIsActive=$_POST['isUserActive'];
// store user
$user = $db->storeUser($name,$phone,$date,$userIsActive);
if ($user!=null) {
// user stored successfully
$response["user"]["uid"] = $user["uid"];
$response["user"]["UserName"] = $user["userName"];
$response["user"]["Phone"] = $user["userPhone"];
$response["user"]["isUserActive"] = $user["isUserActive"];
$response["user"]["Register"] = true;
echo json_encode($response);
}
else {
$user1 = $db->UserExist($name,$phone);
// user failed to store
$response["user"]["uid"] = $user1["uid"];
$response["user"]["Register"] = false;
$response["error_msg"] = "user_exist";
echo json_encode($response);
}
}
else if($tag == 'CompleteTrip'){
$trip= $_POST['Trip'];
// $tripstartDate = $_POST['tripStartDate'];
// $uid=$_POST['userID'];
// $bumpGravity = $_POST['bumpGravity'];
// $bumpLong=$_POST['bumpLong'];
// $bumplat=$_POST['bumplat'];
// $bumpTime=$_POST['bumpTime'];
//$bump=$_POST['bump'];
$arraykey=array_keys($trip);
$tripcount=count($arraykey);
for ($i=0; $i < $tripcount ; $i++) {
// print_r($arr[$arraykey[$i]]);
$tripDescription=array_value_recursive('tripDescription',
$trip[$arraykey[$i]]);
$tripStartDate=array_value_recursive('tripStartDate',
$trip[$arraykey[$i]]);
$userID=array_value_recursive('userID', $trip[$arraykey[$i]]);
$bumpGravity=array_value_recursive('bumpGravity',
$trip[$arraykey[$i]]);
$bumpLong=array_value_recursive('bumpLong', $trip[$arraykey[$i]]);
$bumplat=array_value_recursive('bumplat', $trip[$arraykey[$i]]);
$bumpTime=array_value_recursive('bumpTime', $trip[$arraykey[$i]]);
$trip1 = $db-
>addcompletetrip($tripDescription,$tripStartDate,$userID,$bumpGravity,
$bumpLong,
$bumplat,$bumpTime);
}
//$trip = $db->addcompletetrip($tripdescription,$tripstartDate,$uid,$bumpGravity,$bumpLong,$bumplat,$bumpTime);
if ($trip1) {
$response["trip"]["feedback"] = "true";
echo json_encode($response);
}
else
{
$response["trip"]["feedback"] = "false";
echo json_encode($response);
}
}
else if ($tag == 'Trip') {
$tripdescription = $_POST['tripDescription'];
$tripstartDate = $_POST['tripStartDate'];
$uid=$_POST['userID'];
// store trip
$trip = $db->tripstart($tripdescription,$tripstartDate,$uid);
if ($trip) {
// trip stored successfully
$response["trip"]["Description"] = $trip["tripDescription"];
$response["trip"]["startDate"] = $trip["tripStartDate"];
$response["trip"]["userID"] = $trip["userID"];
$response["trip"]["tripID"] = $trip["tripID"];
echo json_encode($response);
} else {
// user failed to store
$response["error"] = false;
$response["error_msg"] = "Error occured in Registartion";
echo json_encode($response);
}
}
else if ($tag == 'Bump') {
// Request type is Register new user
$tripID = $_POST['tripId'];
$bumpGravity = $_POST['bumpGravity'];
$bumpLong=$_POST['bumpLong'];
$bumplat=$_POST['bumplat'];
$bumpTime=$_POST['bumpTime'];
// store trip
$trip = $db-
>addbumps($tripID,$bumpGravity,$bumpLong,$bumplat,$bumpTime);
if ($trip) {
// trip stored successfully
$response["bump"]["feedback"] = "true";
echo json_encode($response);
} else {
// user failed to store
$response["error"] = false;
$response["error_msg"] = "Error occured in Registartion";
echo json_encode($response);
}
}
else if ($tag == 'LeaderBoard') {
// store trip
$LBresponse = $db-
>addbumps($tripID,$bumpGravity,$bumpLong,$bumplat,$bumpTime);
if ($LBresponse) {
echo json_encode($LBresponse);
} else {
// user failed to store
$response["error"] = false;
$response["error_msg"] = "Error occured in during data
fetching";
echo json_encode($response);
}
}
else if ($tag == 'userHistory') {
$uid=$_POST['userID'];
// store trip
$history = $db->showhistory($uid);
if ($history) {
echo json_encode($history);
} else {
// user failed to store
$response["error"] = false;
$response["error_msg"] = "Error occured in during data
fetching";
echo json_encode($response);
}
}
else {
// user failed to store
$response["error"] = false;
$response["error_msg"] = "error in saving data";
echo json_encode($response);
}
?>
这是我的json字符串
{
"tag" : "CompleteTrip",
"Trip" : [
{
"tripDescription" : "My Trip number 17",
"userID" : "35",
"bump" : [
{
"bumpLong" : "73.089104",
"bumplat" : "33.732934",
"bumpTime" : "20.05.2015",
"bumpGravity" : 0.5719842483606042
},
{
"bumpLong" : "73.089104",
"bumplat" : "33.732934",
"bumpTime" : "20.05.2015",
"bumpGravity" : 0.4080177753918094
},
{
"bumpLong" : "73.089104",
"bumplat" : "33.732934",
"bumpTime" : "20.05.2015",
"bumpGravity" : 0.448878156374468
}
],
"tripStartDate" : "20.05.2015"
},
{
"tripDescription" : "My Trip number 18",
"userID" : "35",
"bump" : [
{
"bumpLong" : "73.089105",
"bumplat" : "33.732965",
"bumpTime" : "20.05.2015",
"bumpGravity" : 0.6059529999867896
},
{
"bumpLong" : "73.089105",
"bumplat" : "33.732965",
"bumpTime" : "20.05.2015",
"bumpGravity" : 0.4395928505184715
},
{
"bumpLong" : "73.089105",
"bumplat" : "33.732965",
"bumpTime" : "20.05.2015",
"bumpGravity" : 0.4675621285346855
},
{
"bumpLong" : "73.089105",
"bumplat" : "33.732965",
"bumpTime" : "20.05.2015",
"bumpGravity" : 0.6471158319159812
}
],
"tripStartDate" : "20.05.2015"
},
{
"tripDescription" : "My Trip number 19",
"userID" : "35",
"bump" : [
{
"bumpLong" : "73.089216",
"bumplat" : "33.733184",
"bumpTime" : "21.05.2015",
"bumpGravity" : 0.6152545665366322
},
{
"bumpLong" : "73.089216",
"bumplat" : "33.733184",
"bumpTime" : "21.05.2015",
"bumpGravity" : 0.5464117459805118
},
{
"bumpLong" : "73.089216",
"bumplat" : "33.733184",
"bumpTime" : "21.05.2015",
"bumpGravity" : 0.5087776494496044
}
],
"tripStartDate" : "21.05.2015"
},
{
"tripDescription" : "My Trip number 20",
"userID" : "35",
"bump" : [
{
"bumpLong" : "73.089113",
"bumplat" : "33.732939",
"bumpTime" : "21.05.2015",
"bumpGravity" : 0.7385709255522828
},
{
"bumpLong" : "73.089113",
"bumplat" : "33.732939",
"bumpTime" : "21.05.2015",
"bumpGravity" : 0.607726128634555
},
{
"bumpLong" : "73.089113",
"bumplat" : "33.732939",
"bumpTime" : "21.05.2015",
"bumpGravity" : 0.5887302539592243
},
{
"bumpLong" : "73.089113",
"bumplat" : "33.732939",
"bumpTime" : "21.05.2015",
"bumpGravity" : 0.4596315163659364
}
],
"tripStartDate" : "21.05.2015"
},
{
"tripDescription" : "My Trip number 21",
"userID" : "35",
"bump" : [
{
"bumpLong" : "73.089105",
"bumplat" : "33.732965",
"bumpTime" : "21.05.2015",
"bumpGravity" : 0.6060029844771418
},
{
"bumpLong" : "73.089105",
"bumplat" : "33.732965",
"bumpTime" : "21.05.2015",
"bumpGravity" : 0.4437488421895869
},
{
"bumpLong" : "73.089105",
"bumplat" : "33.732965",
"bumpTime" : "21.05.2015",
"bumpGravity" : 0.4253806333440103
},
{
"bumpLong" : "73.089105",
"bumplat" : "33.732965",
"bumpTime" : "21.05.2015",
"bumpGravity" : 0.7034483457347098
}
],
"tripStartDate" : "21.05.2015"
},
{
"tripDescription" : "My Trip number 22",
"userID" : "35",
"bump" : [
{
"bumpLong" : "73.089067",
"bumplat" : "33.732891",
"bumpTime" : "21.05.2015",
"bumpGravity" : 0.5309099143204541
},
{
"bumpLong" : "73.089014",
"bumplat" : "33.732961",
"bumpTime" : "21.05.2015",
"bumpGravity" : 0.4918705089435963
},
{
"bumpLong" : "73.089067",
"bumplat" : "33.732891",
"bumpTime" : "21.05.2015",
"bumpGravity" : 0.6217900667121954
}
],
"tripStartDate" : "21.05.2015"
}
]
}
最佳答案
因为 array_keys() 需要一个数组，而 $trip 是一个 (json-) 字符串。 你必须调用json_decode()在使用 json 数据之前。
关于PHP: Json解码错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30450358/