(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)
bzcompress — Compress a string into bzip2 encoded data
$data, int $block_size = 4, int $work_factor = 0): string|intbzcompress() compresses the given string and returns it as bzip2 encoded data.
dataThe string to compress.
block_sizeSpecifies 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_factorControls 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;
?>