(PHP ActiveX) Read/Write JSON with Binary Data such as JPEG Files

Demonstrates how binary files could be stored in JSON in base64 format. Creates JSON containing the contents of a JPG file, and then reads the JSON to extract the JPEG image.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

// First load a small JPG file..
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.BinData')
$bd = new COM("Chilkat.BinData");

$success = $bd->LoadFile('qa_data/jpg/starfish20.jpg');
// Assume success, but your code should check for success..

// Create JSON containing the binary data in base64 format.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject')
$json1 = new COM("Chilkat.JsonObject");
$json1->UpdateBd('starfish','base64',$bd);

$jsonStr = $json1->emit();
print $jsonStr . "\n";

// Here's the output:
// {"starfish":"/9j/4AAQSkZJRgA ... cN2iuLFsCEbDGxQkI6RO/n//2Q=="}

// Let's create a new JSON object, load it with the above JSON, and extract the JPG image..
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject')
$json2 = new COM("Chilkat.JsonObject");
$json2->Load($jsonStr);

// Get the binary bytes.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.BinData')
$bd2 = new COM("Chilkat.BinData");
$json2->BytesOf('starfish','base64',$bd2);

// Save to a file.
$success = $bd2->WriteFile('qa_output/starfish20.jpg');

print 'Success.' . "\n";

?>