Trying to create a json but i get a php warning - php

Question

When I run this:
<?php
$array = array_count_values($roles);
var_dump($roles);
$result = array();
foreach($array as $key => $value) {
$result[]=array("name"=>$key,"data"=>$value);
}
?>
I get this
Warning: array_count_values(): Can only count STRING and INTEGER
values!
The var_dump gives me
array(7) { ["francese"]=> array(2) { ["maschio"]=> array(1) { [0]=> bool(true) } ["femmina"]=> array(1) { [0]=> bool(true) } } ["chimica"]=> array(1) { ["maschio"]=> array(2) { [0]=> bool(true) [1]=> bool(true) } } ["fisica"]=> array(2) { ["maschio"]=> array(2) { [0]=> bool(true) [1]=> bool(true) } ["femmina"]=> array(1) { [0]=> bool(true) } } ["scienze"]=> array(1) { ["maschio"]=> array(1) { [0]=> bool(true) } } ["inglese"]=> array(1) { ["maschio"]=> array(1) { [0]=> bool(true) } } ["spagnolo"]=> array(1) { ["maschio"]=> array(1) { [0]=> bool(true) } } ["italiano"]=> array(1) { ["femmina"]=> array(1) { [0]=> bool(true) } } }
When I run this I get the correct result:
<?php
foreach($roles as $skill => $genderB) {
$males = isset($genderB['maschio']) ? count($genderB['maschio']): 0;
$females = isset($genderB['femmina']) ? count($genderB['femmina']): 0;
$total = $males + $females;
$data[] = $total;
echo "<li>We have ".$total." teachers of ".$skill.", ".$males." male, ".$females." female</li>";
}
?>
Result
We have 2 teachers of francese, 1 male, 1 female
We have 2 teachers of chimica, 2 male, 0 male
And what I would like to achieve is:
[{"name":"francese","data":2},{"name":"inglese","data":4}]
I am getting confused on which array I should be getting
UPDATE
This is the json_encode($roles) as request in the comment
{"francese":{"maschio":[true],"femmina":[true]},"chimica":{"maschio":[true,true]},"fisica":{"maschio":[true,true],"femmina":[true]},"scienze":{"maschio":[true]},"inglese":{"maschio":[true]},"spagnolo":{"maschio":[true]},"italiano":{"femmina":[true]}}
UPDATE 2
With the answer I got I am still not getting the correct json
[{"name":0,"data":{"name":"francese","data":2}},{"name":1,"d‌​ata":{"name":"chimic‌​a","data":2}},{"name‌​":2,"data":{"name":"‌​fisica","data":3}},{‌​"name":3,"data":{"na‌​me":"scienze","data"‌​:1}},{"name":4,"data‌​":{"name":"inglese",‌​"data":1}},{"name":5‌​,"data":{"name":"spa‌​gnolo","data":1}},{"‌​name":6,"data":{"nam‌​e":"italiano","data"‌​:1}}]
when I run
$result = array();
foreach($final_array as $key => $value) {
$result[]=array("name"=>$key,"data"=>$value);
}
echo json_encode($result);
It should be
[{"name":"francese","data":2},{"name":"inglese","data":4}]

Answer 1

you just need to make array and push it into final array like otherwise your code perfect
// $data[] = $total;
$final_array[]=array("name"=>$skill,"data"=>$total);
UPDATE 1:
<?php
$roles ='{"francese":{"maschio":[true],"femmina":[true]},"chimica":{"maschio":[true,true]},"fisica":{"maschio":[true,true],"femmina":[true]},"scienze":{"maschio":[true]},"inglese":{"maschio":[true]},"spagnolo":{"maschio":[true]},"italiano":{"femmina":[true]}}';
$roles_new = json_decode($roles,true);
echo "<pre>";
print_r($roles_new);
$final_array =array();
foreach($roles as $skill => $genderB) {
$males = isset($genderB['maschio']) ? count($genderB['maschio']): 0;
$females = isset($genderB['femmina']) ? count($genderB['femmina']): 0;
$total = $males + $females;
$final_array[]=array("name"=>$skill,"data"=>$total);
}
print_r($final_array);
echo json_encode($final_array);
?>
OUTPUT :
[{"name":"francese","data":2},{"name":"chimica","data":2},{"name":"fisica","data":3},{"name":"scienze","data":1},{"name":"inglese","data":1},{"name":"spagnolo","data":1},{"name":"italiano","data":1}]