(PHP Extension) JSON: Miscellaneous Operations

Demonstrates a variety of JSON API methods. This example uses the following JSON document:

{
   "alphabet": "abcdefghijklmnopqrstuvwxyz",
   "sampleData" : {
           "pi": 3.14,
	   "apple": "juicy",
	   "hungry": true,
	   "withoutValue": null,
           "answer": 42
          
	}
}

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?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();
$json->put_EmitCompact(false);

// Assume the file contains the data as shown above..
$success = $json->LoadFile('qa_data/json/sample2.json');
if ($success != true) {
    print $json->lastErrorText() . "\n";
    exit;
}

// First navigate to the "sampleData" object:
// sampleData is a CkJsonObject
$sampleData = $json->ObjectOf('sampleData');

// Demonstrate BoolAt and BoolOf
print 'hungry: ' . $sampleData->BoolOf('hungry') . "\n";
print 'hungry: ' . $sampleData->BoolAt(2) . "\n";

// StringOf returns the value as a string regardless of it's actual type:
print 'pi: ' . $sampleData->stringOf('pi') . "\n";
print 'answer: ' . $sampleData->stringOf('answer') . "\n";
print 'withoutValue: ' . $sampleData->stringOf('withoutValue') . "\n";
print 'hungry: ' . $sampleData->stringOf('hungry') . "\n";

// Demonstrate IsNullOf / IsNullAt
print 'withoutValue is null? ' . $sampleData->IsNullOf('withoutValue') . "\n";
print 'withoutValue is null? ' . $sampleData->IsNullAt(3) . "\n";
print 'apple is null? ' . $sampleData->IsNullOf('apple') . "\n";
print 'apple is null? ' . $sampleData->IsNullAt(1) . "\n";

// IntOf
print 'answer: ' . $sampleData->IntOf('answer') . "\n";

// SetNullAt, SetNullOf
// Set "pi" to null
$success = $sampleData->SetNullAt(0);
// Set "answer" to null
$success = $sampleData->SetNullOf('answer');

// Show the changes:
print $json->emit() . "\n";

// Restore pi and apple:
$success = $sampleData->SetNumberAt(0,'3.14');
$success = $sampleData->SetNumberOf('answer','42');

// Show the changes:
print $json->emit() . "\n";

// Add a null value named "afterApple" just after "apple"
$success = $sampleData->AddNullAt(2,'afterApple');

// Add a boolean value just after "pi"
$success = $sampleData->AddBoolAt(1,'afterPi',false);

// Examine the changes..
print $json->emit() . "\n";

?>