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(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)
bzcompress — Compress a string into bzip2 encoded data
bzcompress() 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.
As of PHP 8.5.0, a ValueError is thrown if
block_size is not between 1 and 9, or if
work_factor is not between 0 and 250.
| Versione | Descrizione |
|---|---|
| 8.5.0 |
A ValueError is now thrown if
block_size is not between 1 and 9, or if
work_factor is not between 0 and 250.
|
Example #1 Compressing data
<?php
$str = "sample data";
$bzstr = bzcompress($str, 9);
echo $bzstr;
?>