LANGUAGE: English, 简体中文
- JSON Data Brother
- INTRODUCE
- SUMMARY
- JSON HANDLER
- JSON SENDER
- How does my PHP return data?
- First, Create a blank php like this.
- Second, Type the php code like this
- Third, Open your browser and open php page
- So, if we write this php in a more complex way... - How to check my php return data in BP?
- First, Add a JsonSender ActorComponent to your Actor
- Second, Create node like this
- Third, Create a CustomEvent for the red "Event"
- Fourth, Print the content
- Fifth, Send JSON String to your php
- Sixth, Place actor to your level
- Final, Play or Simulate - How to get Field Value？
- First, deserialize your JSON String into JSON Object
- Second, use GetJsonValue node to get the value in the JSON Object
- Third, use Break node to obtain the data in the structure
- Fourth, Print String
- Final, Play or Simulate. - How to modify the Value of a Field?
- First, deserialize your JSON String into JSON Object.
- Second, create a SetJsonValue node and set it correctly
- Third, create a structure for ValueStruct
- Fourth, enter a new value in the structure
- Fifth, add a GetJsonValue node after the SetJsonValue node
- Sixth, create the structure and Print the String in the structure as before
- Final, Play or Simulate - How to modify the Value of Field in an array element?
- First, write a complex JSON String
- Second, get the Field of the array element and break the structure
- Third, get JSON Object in the array
- Fourth, set the Value of Name Field to Lisa
- Fifth, output the value of the Name Field in the first JsonObject in the StudentList array
- Sixth, connect JsonObject with the original JsonObject
- Final, Play or Simulate
This plug-in can easily process JSON data and message them back to your server.
I have no work experience but I know I can use php ECHO to return the data I want.
For example, you need a function to query user data and this function can be run on UNITY or UNREAL ENGINE. You may search for SQL plug-ins in UNITY MARKET or EPIC MARKET, but it will be very troublesome. (You need twice as much work)
If we implement this function on PHP and then use the HTTP REQUEST function of UNITY or UNREAL ENGINE to query the SQL data, this will become very simple.
This plug-in has two parts: Json Handler and Json Sender. Their names are the same as their functions.
| Name | Function |
|---|---|
| Json Handler | Serialize your JsonObject or deserialize your JsonString. You can modify the value of the field after deserialization or just read their values. |
| Json Sender | Message json data to your php and receive data returned by php echo. |
I don't want this plugin to be toooo complex, so I only gave it simple GET and SET functions, which is enough to complete my stupid workflow.
Note that you cannot directly replace an array object with other array object
Because of some limitations of UE C++, this function (JsonSender) cannot be separated from an object, so I made it into a component, which will work well in my cute Actor.
This node will create a HTTP REQUEST POST which MIME type is set to Application/json; Charset="UTF8" . When the web is loaded, the OnRequestCompletee delegate will be broadcast.
<?php
echo "Shader makes me full of power!";
?>As you can see, only your ECHO CONTENT on the whole page.
This is the result that the website will return to our program. (CallbackDelegate->Content)
<?php
if($mode == "query")
{
$username = YOUR QUERY CODE;
echo $username;
}
if($mode == "delete")
{
YOUR DELETE CODE;
echo "Successful";
}
if($mode == "add")
{
YOUR ADD CODE;
echo "Successful";
}
?>Can you imagine that your work has been transferred to PHP!
You are no longer limited by SQL plug-ins.
No matter what program you are developing, As long as your platform can message HTTP REQUEST, it can connect with your php system!
This will bind the function for the delegate OnRequestCompletee.
And you will see this node, Content variable is your php return data.
My php will return the value of the mode field. You can find the PHP code below.
<?php
header("content-type:text/html;charset=utf-8");
$jsonString = file_get_contents("php://input");
$jsonObject = json_decode($jsonString);
echo $jsonObject->mode;
?>
You can put the basic format of JSON String on your PHP server to dynamically update them.
This will return a structure to get the type pointed by the Type enumeration.
And you will get such a structure.
The data on the structure corresponds one-to-one with the type of the GetJsonValue node.
Blueprint overview.
As you can see, the value of mode is printed.
The FieldType variable is the type of this Field. If the type is wrong, it will LOG ERROR.
The data in the structure is one-to-one corresponding to FieldType.
Set array value to other array object is not allowed.
TESTTTT has been modified to You are clear.
This JSON has a StudentList array and two elements.
Each element can be regarded as a JSON Object.
I like to use the Make Literal String node to organize complex string data.
{
"StudentList":
[
{
"Name":"Bob",
"Age":"18"
},
{
"Name":"Billy",
"Age":"19"
}
]
}
So far, we have successfully changed Bob to Lisa. Next we will print this Name Value.
The return value of the SetJsonValue node is an element of the array, so we need to connect the JsonObject to the original JsonObject Root.
As you can see, Bob in JsonObject has been changed to Lisa.
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