bzcompress

(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

bzcompress — Compress a string into bzip2 encoded data

bzcompress(string $data, int $block_size = 4, int $work_factor = 0): string|int

bzcompress() compresses the given string and returns it as bzip2 encoded data.

data: The string to compress.
block_size: Specifies the blocksize used during compression and should be a number from 1 to 9 with 9 giving the best compression, but using more resources to do so.
work_factor: Controls how the compression phase behaves when presented with worst case, highly repetitive, input data. The value can be between 0 and 250 with 0 being a special case. Regardless of the work_factor, the generated output is the same.

The compressed string, or an error number if an error occurred.

Example #1 Compressing data

<?php
$str = "sample data";
$bzstr = bzcompress($str, 9);
echo $bzstr;
?>