Question

I’m trying to get the values of a text area and create a json object based on that .

The textarea looks like this:

<textarea name="msisdn" wrap="physical">
51971855080
51971855081
51971855082
</textarea>

The dynamic parts are “messId” and “destAddr” the other ones will be replaced with php variables received from a form like this way:

$str_obj_json='{
"method":"SUBMIT","params":{
"batchType":"submit",
"batchId":"'.$batch.'",
"origAddr":"550",
"origTon":2,
"userData":"'.$sms.'",
"submits":
  [
   {
   "messId":"mess127_009",
   "destAddr":"51971855080"},
   {
   "messId":"mess127_010",
   "destAddr":"51971855081"},
   {
   "messId":"mess127_011",
   "destAddr":"51971855082"},
  ]
}
}';

How to create this part dynamically ?:

  "submits":
  [
   {
   "messId":"mess127_009",
   "destAddr":"51971855080"},
   {
   "messId":"mess127_010",
   "destAddr":"51971855081"},
   {
   "messId":"mess127_011",
   "destAddr":"51971855082"},
  ]

Answer 1

Use json_encode():

$submits = array();

for (...) {
    $submits[] = array('messId' => ..., 'destAddr' => ...);
}

$jsonString = json_encode(array('submits' => $submits);

It converts PHP arrays into JSON notation. So you can create your array dynamically as desired, and then encode it afterwards.

As for using the values from the textarea: Just split the corresponding $_POST data into lines using split("\n", $_POST['msisdn'])