(PHP Extension) Compute Glacier SHA256 Tree Hash of a File
Computes the Amazon Glacier SHA256 tree hash for a file.
Note: This example requires Chilkat v9.5.0.78 or greater.
<?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");
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
$crypt = new CkCrypt2();
// For more information about Amazon Glacier tree hashes, see Computing Glacier Checksums
// Chilkat added the "sha256-tree-hash" algorithm in v9.5.0.78 to make it easy to compute the Glacier tree hash checksum
// of a file or from bytes in memory.
$crypt->put_HashAlgorithm('sha256-tree-hash');
// Return the hash in lowercase hexidecimal format.
$crypt->put_EncodingMode('hexlower');
$treeHashHex = $crypt->hashFileENC('qa_data/jpg/penguins.jpg');
print 'SHA256 tree hash = ' . $treeHashHex . "\n";
?>
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