(PHP Extension) Replacment for Deprecated Crypt2 Compress Functions

The Chilkat Crypt2 compression functions are deprecated and will be removed. This example shows how to duplicate the functionality using the Chilkat Compression class.

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<?php

include("chilkat.php");
// Use "chilkat_9_5_0.php" for versions of Chilkat < 10.0.0

$crypt = new CkCrypt2();

// Create data to be compressed.
$sb = new CkStringBuilder();
$i = 0;
while ($i < 25) {
    $sb->Append('Hello World, this is a test.\r\n');
    $i = $i + 1;
}

// Bzip2 compress the utf-8 byte representation of the string and return the compressed data as base64.
$crypt->put_Charset('utf-8');
$crypt->put_EncodingMode('base64');
$compressedStr = $crypt->compressStringENC($sb->getAsString());

print $compressedStr . "\n";

// Result: 4aeUs+4CAABCWmgzMUFZJlNZZ6znBgAAfNeAABJABQBAAIAmZJwAIABwUNNMAAUqoekYjMp4ixF1FlFxF8i5i1FvFwizF9iwi9RdxaizF7RZi6i0ixF3Fui/i7kinChIM9ZzgwA=

// The result contains an 8-byte header composed of a 4-byte magic number (0xB394A7E1) and a 4-byte length.
// Do the following to BZip2 decompress using Chilkat Compression
$bd = new CkBinData();
$bd->AppendEncoded($compressedStr,'base64');

// Remove the 8-byte header.
$bd->RemoveChunk(0,8);

// Decompress
$compress = new CkCompression();
$compress->put_Algorithm('bzip2');
$compress->DecompressBd($bd);

// Get the decompressed string.
$decompressedStr = $bd->getString('utf-8');
print $decompressedStr . "\n";

?>