php string manipulation similar to C

Question

I need to send this form of data :

 $objectData = '{"userid":"abc", "action":"def","data":"data"}';

I have the vars already :

$userID=htmlspecialchars($_GET["userid"]);
$action=htmlspecialchars($_GET["action"]);
$data=htmlspecialchars($_GET["data"]);

How should i create $objectData with these fields inside(userid/action/data)?

Something similar i know (OBJ-C) [stringWithFormat:" %@, %d", "a", 5 ];

Why complicate things, can't you use normal PHP string concatenation? — Some programmer dude
– Some programmer dude, Commented Oct 22, 2015 at 11:12
FYI, the use of htmlspecialchars is unnecessary/misplaced/abused/wrong here. — deceze
– deceze ♦, Commented Oct 22, 2015 at 11:16

Daan · Accepted Answer · 2015-10-22 11:13:07Z

3

So you want to create a json string. You can use stdClass(); to create an empty object and use json_encode() to make it a json string.

$objectData = new stdClass();
$objectData->userid = $userID;
$objectData->action = $action;
$objectData->data = $data;
$objectData = json_encode($objectData);

answered Oct 22, 2015 at 11:13

Daan

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deceze · Accepted Answer · 2015-10-22 11:14:03Z

3

That is JSON, produce it with json_encode.

echo json_encode([
    'userid' => $_GET['userid'],
    'action' => $_GET['action'],
    'data'   => $_GET['data']
]);

Or simply:

echo json_encode($_GET);

Since, apparently $_GET already has the array structure you want.

answered Oct 22, 2015 at 11:14

deceze♦

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Anto S · Accepted Answer · 2015-10-22 11:21:52Z

1

Form array and then using json_encode() you can generate json string

<?php

$userID=htmlspecialchars($_GET["userid"]);
$action=htmlspecialchars($_GET["action"]);
$data=htmlspecialchars($_GET["data"]);
$jsonArray = array('userid' => $userID, 'action' => $action, 'data' => $data);

echo json_encode($jsonArray);

// TO DECODE JSON STRING

echo json_decode($jsonbject);

?>

edited Oct 22, 2015 at 11:21

answered Oct 22, 2015 at 11:18

Anto S

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Comments

flowit · Accepted Answer · 2015-10-22 11:14:29Z

0

In Php you can simply concatenate strings with a dot. Like this:

$objectData = '{"userid":"' . $userID . '", "action":"' . $action . '","data":"' . $data . '"}';

answered Oct 22, 2015 at 11:14

flowit

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2 Comments

deceze Over a year ago

While yes, you can do that, it's probably a bad idea to do so, because you're risking producing invalid JSON.

flowit Over a year ago

No denying in that, but this works also when you don't produce JSON.

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