Looping through a JSON in PHP - php

Question

I'm trying to loop through a JSON that I post to my PHP backend. The JSON looks like this:
[
{
"number":"5613106"
},
{
"number":"56131064"
},
{
"number":"56131063"
}
]
I post it from Postman like so:
I want to be able to print each number that I've posted individually using
echo $number;
Right now when I use the following it just prints the last number:
$number = $json['number'];
echo $number;
My function:
public function check_users_post()
{
$json = $this->request->body;
print_r($json);
$this->response($json, REST_Controller::HTTP_OK);
}
The output:
Array
(
[0] => Array
(
[number] => 5613106
)
[1] => Array
(
[number] => 56131064
)
[2] => Array
(
[number] => 56131063
)
)

Answer 1

Hope this generic iterator will help you.
$jsonIterator = new RecursiveIteratorIterator(
new RecursiveArrayIterator(json_decode($json, TRUE)),
RecursiveIteratorIterator::SELF_FIRST);
foreach ($jsonIterator as $key => $val) {
if(is_array($val)) {
echo "$key:\n";
} else {
echo "$key => $val\n";
}
}

Answer 2

Use
json_decode()
PHP built in function for decoding json back to PHP variable or array and then loop through each index and print number.

Answer 3

Got it done like this:
public function check_users_post()
{
$json = $this->request->body;
$jsonIterator = new RecursiveIteratorIterator(
new RecursiveArrayIterator($json),
RecursiveIteratorIterator::SELF_FIRST);
$phone_numbers = "";
foreach ($jsonIterator as $key => $val) {
if(is_array($val)) {
} else {
$phone_numbers = "$phone_numbers" . ", " . "$val";
}
}
$phone_numbers = substr($phone_numbers, 2);
$phone_numbers = "(" . $phone_numbers . ")";
$query = $this->db->query("SELECT * FROM users WHERE user_number in $phone_numbers;");
$result = $query->result();
$this->response($result, REST_Controller::HTTP_OK);
if (mysql_num_rows($result)==0) {
$data = [ 'message' => 'No users returned'];
$this->response($data, REST_Controller::HTTP_BAD_REQUEST);
} else {
$this->response($result, REST_Controller::HTTP_OK);
}
}

Answer 4

Description
First stringify your JSON, than use JSON_DECODE() function which gives you the array afterwards iterate on this array using foreach loop which will give you the each key which you want to echo.
Code
$str = '[
{
"number":"5613106"
},
{
"number":"56131064"
},
{
"number":"56131063"
}
]';
$array = json_decode($str, true);
echo "<pre>";
foreach ($array as $key => $key_value) { // then loop through it
echo "<br>";
echo $array[$key]['number'];
echo "<br>";
}
Output
5613106
56131064
56131063