PHP ActiveX

Decompress Gzip Data In-Place Using BinData

See more Gzip Examples

This example demonstrates how to use the UncompressBd method to decompress Gzip data stored in a BinData object.

The compressed .gz file is first loaded into memory. The UncompressBd method then decompresses the data in-place, meaning the original compressed bytes in the BinData object are replaced with the uncompressed data.

After decompression, the example writes the resulting data to a file. This approach is useful when working entirely in memory before saving or further processing the uncompressed data.

PHP ActiveX

<?php

$success = 0;

// This example demonstrates how to decompress Gzip data stored in a BinData object.
// The decompression is done in-place, replacing the compressed data with the original data.

$gzip = new COM("Chilkat.Gzip");
$bd = new COM("Chilkat.BinData");

// Load a .gz file into BinData:
$success = $bd->LoadFile('example.txt.gz');
if ($success == 0) {
    print $bd->LastErrorText . "\n";
    exit;
}

print 'Compressed size (bytes): ' . $bd->NumBytes . "\n";

// Uncompress the data in-place:
$success = $gzip->UncompressBd($bd);
if ($success == 0) {
    print $gzip->LastErrorText . "\n";
    exit;
}

print 'Decompressed size (bytes): ' . $bd->NumBytes . "\n";

// Save the uncompressed data to a file:
$success = $bd->WriteFile('example.txt');
if ($success == 0) {
    print $bd->LastErrorText . "\n";
    exit;
}

print 'File successfully uncompressed to example.txt' . "\n";

?>