How to access JSON decoded array in PHP
I returned an array of JSON
data type from javascript
to PHP
, I used json_decode($data, true)
to convert it to an associative array, but when I try to use it using the associative index
, I get the error "Undefined index"
The returned data looks like this
array(14) { [0]=> array(4) { ["id"]=> string(3) "597" ["c_name"]=> string(4) "John" ["next_of_kin"]=> string(10) "5874594793" ["seat_no"]=> string(1) "4" }
[1]=> array(4) { ["id"]=> string(3) "599" ["c_name"]=> string(6) "George" ["next_of_kin"]=> string(7) "6544539" ["seat_no"]=> string(1) "2" }
[2]=> array(4) { ["id"]=> string(3) "601" ["c_name"]=> string(5) "Emeka" ["next_of_kin"]=> string(10) "5457394839" ["seat_no"]=> string(1) "9" }
[3]=> array(4) { ["id"]=> string(3) "603" ["c_name"]=> string(8) "Chijioke" ["next_of_kin"]=> string(9) "653487309" ["seat_no"]=> string(1) "1" }
Please, how do I access such array in PHP
? Thanks for any suggestion.
As you're passing true
as the second parameter to json_decode
, in the above example you can retrieve data doing something similar to:
$myArray = json_decode($data, true);
echo $myArray[0]['id']; // Fetches the first ID
echo $myArray[0]['c_name']; // Fetches the first c_name
// ...
echo $myArray[2]['id']; // Fetches the third ID
// etc..
If you do NOT pass true
as the second parameter to json_decode
it would instead return it as an object:
echo $myArray[0]->id;
$data = json_decode($json, true);
echo $data[0]["c_name"]; // "John"
$data = json_decode($json);
echo $data[0]->c_name; // "John"
$data = json_decode(...);
$firstId = $data[0]["id"];
$secondSeatNo = $data[1]["seat_no"];
Just like this :)
As you're passing true as the second parameter to json_decode
, in the above example you can retrieve data doing something similar to:
<?php
$json = '{"a":1,"b":2,"c":3,"d":4,"e":5}';
var_dump(json_decode($json));
var_dump(json_decode($json, true));
?>
This may help you!
$latlng='{"lat":29.5345741,"lng":75.0342196}';
$latlng=json_decode($latlng,TRUE); // array
echo "Lat=".$latlng['lat'];
echo '<br/>';
echo "Lng=".$latlng['lng'];
echo '<br/>';
$latlng2='{"lat":29.5345741,"lng":75.0342196}';
$latlng2=json_decode($latlng2); // object
echo "Lat=".$latlng2->lat;
echo '<br/>';
echo "Lng=".$latlng2->lng;
echo '<br/>';