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PHP Extension Examples

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(PHP Extension) Get the Root of a JSON Document

Demonstrates how to get back to the JSON root object from anywhere in the JSON document. This example uses the following JSON document:

{
  "flower": "tulip",
  "abc":
    {
    "x": [
       { "a" : 1 },
       { "b1" : 100, "b2" : 200 },
       { "c" : 3 }
    ],
    "y": 200,
    "z": 200
    }
}

Chilkat PHP Downloads

PHP Extension for Windows, Linux, MAC OS X,
Alpine Linux, Solaris, OpenBSD, FreeBSD,
and Linux armhf/aarch64

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

$json = new CkJsonObject();

$jsonStr = '{\'flower\': \'tulip\',\'abc\':{\'x\': [{ \'a\' : 1 },{ \'b1\' : 100, \'b2\' : 200 },{ \'c\' : 3 }],\'y\': 200,\'z\': 200}}';

$success = $json->Load($jsonStr);
if ($success != true) {
    print $json->lastErrorText() . "\n";
    exit;
}

// Get the "abc" object.
// abcObj is a CkJsonObject
$abcObj = $json->ObjectOf('abc');
if ($json->get_LastMethodSuccess() == false) {
    print 'abc object not found.' . "\n";
    exit;
}

// Side note: The JSON of a sub-part of the document can be emitted from any JSON object:
$abcObj->put_EmitCompact(false);
print $abcObj->emit() . "\n";

// Navigate to the "x" array
// xArray is a CkJsonArray
$xArray = $abcObj->ArrayOf('x');
// We'll skip the null check and assume it's non-null...

// Navigate to the 2nd object contained within the array.  This contains members b1 and b2
// bObj is a CkJsonObject
$bObj = $xArray->ObjectAt(1);
// We'll skip the null check and assume it's non-null...

// Show that we're at "b1/b2".
// The value of "b1" should be "200"
print 'b2 = ' . $bObj->IntOf('b2') . "\n";

// Now go back to the JSON doc root:
// docRoot is a CkJsonObject
$docRoot = $bObj->GetDocRoot();
// We'll skip the null check and assume it's non-null...

// Pretty-print the JSON doc from the root to show that this is indeed the root.
$docRoot->put_EmitCompact(false);
print $docRoot->emit() . "\n";


?>

 

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