Get a length of a php's result [closed] - php

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I don't know php at all so sorry for a simple question - I've got the project started by another person so now I'm trying to finish it.
The problem is - I'm making an android app for which I can't make a change without changing a php and this language I don't know.
here's this part :
function getPlaces(){
$result = array();
$sql = "SELECT id, name, short_description, photo_list, selected, recommended, isTOP FROM place
WHERE id IN(SELECT id_place FROM rubric_place WHERE id_rubric IN(SELECT id FROM rubric WHERE name = '".$_REQUEST["rubric"]."')) ORDER BY isTOP DESC";
getConnect();
$query = mysql_query($sql);
if(!$query){
error100();
}else {
$result['code'] = 200;
for ($i = 0; $i < mysql_num_rows($query); $i++) {
$row = mysql_fetch_assoc($query);
$result["places"][$i] = $row;
$sql = "SELECT * FROM rubric WHERE id IN(SELECT id_rubric FROM rubric_place WHERE id_place = ".$row[id].")";
$queryModule = mysql_query($sql);
if($queryModule){
for ($k = 0; $k < mysql_num_rows($queryModule); $k++) {
$rowModule = mysql_fetch_assoc($queryModule);
$result["places"][$i]["rubrics"][$k] = $rowModule;
}
}
$sql = "SELECT SUM(rating)/COUNT(rating) AS rating FROM comment WHERE id_place = ".$row[id];
$queryModule = mysql_query($sql);
if($queryModule){
$rowModule = mysql_fetch_assoc($queryModule);
$result["places"][$i]["rating"] = $rowModule[rating];
}
}
echo json_encode($result, JSON_UNESCAPED_UNICODE);
exit();
}
}
what I need is to make another function that returns in $result a value of "length" of places. I know I can find out length on the other end - in Android's app result, but this particular function will be changed so it will return by 20 results only so I need another function that returns length so plz help

Answer 1

To count the number of characters in a json you can do:
$string = json_encode($result, JSON_UNESCAPED_UNICODE);
$length = strlen($string);
You have to first put the json into a variable to count it, before outputting it.
To count the items in an array before you turn it into a json, you can do:
$length = count($array);