How to calculate the length of JSON values in php?

The items you are trying to count are in a single string. First, you must break the string into items, then you can count them.

Take the json and make it into a php array

$jsonData = '{    "posts_id_en": "149968, 149939, 149883, 149877, 149876, 149847, 154303",    "posts_id_fr": "149974,149953,149926, 149920, 149901",    "episode_status": "3"}';$data = json_decode($jsonData, true);

then split the string with the delimiter ", "

$items = explode(", ", $data['posts_id_en']);

then count

echo count($items);

<?php$json = '{    "posts_id_en": "149968, 149939, 149883, 149877, 149876, 149847, 154303",    "posts_id_fr": "149974,149953,149926, 149920, 149901",    "episode_status": "3"}';$decoded = json_decode($json, true);$post_id = $decoded['posts_id_en'];$resultList = [];foreach($decoded as $key => $entry) {    $everyNumberAsArray = explode(',', $entry);        $count = count($everyNumberAsArray);    $resultList[$key] = $count;}var_export($resultList);

gives output:

array (  'posts_id_en' => 7,  'posts_id_fr' => 5,  'episode_status' => 1,)

to get particular values you use them this way:

echo $resultList['posts_id_en'] . '<br>' . PHP_EOL;

that gives you:

7

One simple way would be that we first json_decode, then validate numbers in our desired attribute, and count the matches:

$str = '{    "posts_id_en": "149968, 149939, 149883, 149877, 149876, 149847, 154303",    "posts_id_fr": "149974,149953,149926, 149920, 149901",    "episode_status": "3"}';$str_array = json_decode($str, true);preg_match_all('/(\d+)/s', $str_array["posts_id_en"], $matches);echo sizeof($matches[0]);

Output

7