PHP Extension

Compress Text Feed to Binary

See more Compression Examples

This example receives incoming text data in chunks, compresses as a stream, and accumulates the compressed binary data. PHP Extension

<?php

include("chilkat.php");

$success = false;

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

$bdCompressed = new CkBinData();

$compress = new CkCompression();
$compress->put_Algorithm('deflate');
$compress->put_Charset('utf-8');

$sbUncompressedChunk = new CkStringBuilder();

$compress->put_FirstChunk(true);
$compress->put_LastChunk(false);

for ($i = 0; $i <= 24; $i++) {
    if ($i == 24) {
        $compress->put_LastChunk(true);
    }

    $sbUncompressedChunk->Clear();
    $sbUncompressedChunk->AppendInt($i);
    $sbUncompressedChunk->Append(': This is a line of data to be compressed...\r\n');

    $compress->CompressSb($sbUncompressedChunk,$bdCompressed);

    $compress->put_FirstChunk(false);
}

// Show the compressed data in hex format:
print 'The hex encoded compressed text:' . "\n";
print $bdCompressed->getEncoded('hex') . "\n";

// Now decompress in one call.  It is important to set both FirstChunk and LastChunk = true
$bdDecompressed = new CkBinData();
$compress->put_FirstChunk(true);
$compress->put_LastChunk(true);
$success = $compress->DecompressBd2($bdCompressed,$bdDecompressed);
if ($success == false) {
    print $compress->lastErrorText() . "\n";
    exit;
}

$originalText = $bdDecompressed->getString('utf-8');
print $originalText . "\n";

?>