(PHP Extension) Compress Text Feed to Binary

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

The purpose is to demonstrate the BeginCompressString, MoreCompressString, and EndCompressString methods.

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");

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

$compressedData = new CkBinData();
$compressedBytes = new CkByteData();

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

$sbIndex = new CkStringBuilder();

for ($i = 0; $i <= 24; $i++) {
    // Note: It is possible (and normal) for a BeginCompress* or MoreCompress* method to return
    // an empty string (or 0 bytes).  When this happens, the input data is not lost.  It will be flushed
    // in a subsequent call.
    $sbIndex->Clear();
    $sbIndex->AppendInt($i);
    if ($i == 0) {
        $success = $compress->BeginCompressString($sbIndex->getAsString(),$compressedBytes);
    }
    else {
        $success = $compress->MoreCompressString($sbIndex->getAsString(),$compressedBytes);
    }

    $compressedData->AppendBinary($compressedBytes);
    $success = $compress->MoreCompressString(': This is a line of data to be compressed...\r\n',$compressedBytes);
    $compressedData->AppendBinary($compressedBytes);
}

// Flush any remaining output.
$success = $compress->EndCompressString($compressedBytes);
$compressedData->AppendBinary($compressedBytes);

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

// Now decompress in one call:
$success = $compressedData->GetBinary($compressedBytes);
$originalText = $compress->decompressString($compressedBytes);
print $originalText . "\n";

?>