convert json string to variables

maybe my question is a bit unreasonable, but what's wrong i ask.

I have a simple script like below

<?php
$r['code'] = 200;
$r['result'] = "hello world";
$r['down'][0] = "first";
$r['down'][1] = "second";
echo json_encode($r, JSON_PRETTY_PRINT);
?>


and the results from the script are

{
"code": 200,
"result": "hello world",
"down": [
"first",
"second"
]
}


as seen above, that variables can be converted to json by using json_encode, and to my question, can we change json back into variables?

for example

Before

{
"code": 200,
"result": "hello world",
"down": [
"first",
"second"
]
}


After

<?php
$r['code'] = 200;
$r['result'] = "hello world";
$r['down'][0] = "first";
$r['down'][1] = "second";
echo json_encode($r, JSON_PRETTY_PRINT);
?>


Look at json_decode... or if in the same script $r should still be accessible.
– user3783243
Jun 30 at 3:14

json_decode

$r

json_encode returns json array but will not actually convert $r unless you do something like $r = json_encode($r, JSON_PRETTY_PRINT); simply put you already have your $r in original form
– Digvijaysinh Gohil
Jun 30 at 3:19

json_encode

$r

$r = json_encode($r, JSON_PRETTY_PRINT);

$r

3 Answers
3

Just use json_decode():

json_decode()

$json = '{
"code": 200,
"result": "hello world",
"down": [
"first",
"second"
]
}';

$r = json_decode($json, true);
print_r($r);


This prints:

Array
(
[code] => 200
[result] => hello world
[down] => Array
(
[0] => first
[1] => second
)

)


yes we can accomplished that by using json_decode()

$a = json_decode($r, true);


True is used to say that we want use regular Array

$array['item']


if false is set, the property will be accessed by using

$array->item


Use json_decode() to convert JSON array to PHP array.

json_decode()

$json_array = '{
"code": 200,
"result": "hello world",
"down": [
"first",
"second"
]
}';

$r = json_decode($json_array);


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