json_decode returns null - laravel - php

Question

i am sending json object from front-end using ajax call as the following:
<button id="btn">click me</button>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script>
$('#btn').click(function () {
$.ajax({
url:"/execute",
type:"POST",
contentType: 'json',
data:{
"test":"hello"
},
success:function (data) {
console.log(data.status);
}
});
});
</script>
and i want to decode this json object in laravel, here is my controller code:
public function executeFunction(Request $request){
if($request->header()['content-type'][0] === 'json')
{
Log::info(json_decode($request->getContent(),true));
}
return response()->json(["status"=>"success"]);
}
json_decode returns null here, what might be the problem? Thanks.

Answer 1

I found a solution to this problem, the trick is to use JSON.stringify(data) in front end and json_decode will works fine.
Front end code:
button id="btn">click me</button>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script>
$('#btn').click(function () {
$x = {
"test":"hello"
};
$.ajax({
url:"/execute",
type:"POST",
contentType: 'application/json',
data:JSON.stringify($x),
success:function (data) {
console.log(data);
}
});
});
</script>
Controller code:
public function executeFunction(Request $request){
if($request->header()['content-type'][0] === 'application/json')
{
Log::info(json_decode($request->getContent())->test);
}
}
If you dump the content, this will be the result:
object(stdClass)#423 (1) {
["test"]=>
string(5) "hello"
}