Get the value for key in json array in php - php

Question

How to get the corresponding value for key associated
[{"name":"challenge","properties":[{"name":"mobileNo","value":"aa"},{"name":"challengeT","value":"1Day"},{"name":"emailId","value":"ff#gmail.com"},{"name":"deviceId","value":"9500e297-081b-4f97-93b7-dafddc55db31"}]},{"name":"challenge","properties":[{"name":"emailId","value":"a#b.com"},{"name":"mobileNo","value":"345345"},{"name":"deviceId","value":"435435dfgdfg"}]}]

Answer 1

Your Json is valid. You can validate at following
website: http://jsonlint.com/
You have to use a php "json_decode()" function to decode a json encoded data.
Basically json_decode() function converts JSON data to a PHP array.
Syntax: json_decode( data, dataTypeBoolean, depth, options )
data : - The json data that you want to decode in PHP.
dataTypeBoolean(Optional) :- boolean that makes the function return a PHP Associative Array if set to "true", or return a PHP stdClass object if you omit this parameter or set it to "false". Both data types can be accessed like an array and use array based PHP loops for parsing.
depth :- Optional recursion limit. Use an integer as the value for this parameter.
options :- Optional JSON_BIGINT_AS_STRING parameter.
Now Comes to your Code
$json_string = '[{"name":"challenge","properties":[{"name":"mobileNo","value":"aa"},{"name":"challengeT","value":"1Day"},{"name":"emailId","value":"ff#gmail.com"},{"name":"deviceId","value":"9500e297-081b-4f97-93b7-dafddc55db31"}]},{"name":"challenge","properties":[{"name":"emailId","value":"a#b.com"},{"name":"mobileNo","value":"345345"},{"name":"deviceId","value":"435435dfgdfg"}]}]' ;
Assign a valid json data to a variable $json_string within single quot's ('') as
json string already have double quots.
// here i am decoding a json string by using a php 'json_decode' function, as mentioned above & passing a true parameter to get a PHP associative array otherwise it will bydefault return a PHP std class objecy array.
$json_decoded_data = json_decode($json_string, true);
// just can check here your encoded array data.
// echo '<pre>';
// print_r($json_decoded_data);
// loop to extract data from an array
foreach ($json_decoded_data as $key => $value) {
echo "$key <br/>";
foreach ($value as $key2 => $value2) {
echo "$key2 = $value2 <br />";
}
}
Output :
0
name = challenge
properties = Array
1
name = challenge
properties = Array