Comparing 2 json strings to find new entries
array_diff_assoc is the way to get difference of associative arrays:
$json = json_decode(file_get_contents("new.json"), true);$last_json = json_decode(file_get_contents("last.json"), true);$difference = array_diff_assoc($json, $last_json);print_r($difference); This small piece of code will find out if any whitelist_name is different in the new json than the old one
foreach($last_json as $key=>$value){ if($value['whitelist_name'] != $json[$key]['whitelist_name']){ // value is changed }else{ // value is not changed }}