PHP ActiveX

Compress Text from StringBuilder to Gzip (BinData Output)

See more Gzip Examples

This example demonstrates how to use the CompressSb method to compress text stored in a StringBuilder into Gzip format.

The text is first converted to its byte representation using the specified character set (in this case, UTF-8). These bytes are then compressed, and the resulting Gzip data is written to a BinData object in memory.

This approach is useful when working with dynamically generated text that you want to compress without first writing it to a file. The example also shows how the compressed data can optionally be saved to a .gz file.

PHP ActiveX

<?php

$success = 0;

// This example demonstrates how to compress text contained in a StringBuilder
// into Gzip format, storing the compressed result in a BinData object.

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

// Add some text to the StringBuilder:
$sb->Append('The quick brown fox jumps over the lazy dog.');

// Compress the text using UTF-8 encoding:
$success = $gzip->CompressSb($sb,'utf-8',$bd);
if ($success == 0) {
    print $gzip->LastErrorText . "\n";
    exit;
}

// The BinData now contains the Gzip-compressed bytes.
print 'Compression successful.' . "\n";
print 'Compressed size (bytes): ' . $bd->NumBytes . "\n";

// (Optional) Save to a .gz file:
$success = $bd->WriteFile('text.gz');
if ($success == 0) {
    print $bd->LastErrorText . "\n";
    exit;
}

print 'Gzip file written to text.gz' . "\n";

?>