PHP

php read json request body

//e.g your JSON Req is like this {"UserName":"Ranish","Password":"asdasdasd"}
$jsonReqUrl  = "php://input";
$reqjson = file_get_contents($jsonReqUrl);
$reqjsonDecode = json_decode($reqjson, true);
echo $reqjsonDecode['UserName'];

php json request get value

<?php
$jsonurl = "https://reqres.in/api/users/2";
$json = file_get_contents($jsonurl);
$jsonDecode = json_decode($json, true);
echo $jsonDecode['data']['email'];
?>

php return json data

header('Content-Type: application/json'); 

$colors = array("red","blue","green");
echo json_encode($colors);

php return a json response

//PHP File
<?php
$data = /** whatever your data are **/;
header('Content-Type: application/json; charset=utf-8');
echo json_encode($data);

//In JS File
//JQUERY AJAX
        $.ajax({
        url: "path/to_php_file.php",
        dataType: "json",  
        type: "GET",
        data: {datax : datax },