bzclose
Here is a benchmark comparing strengths of bzip and gzip compression:
gz[0] - 1.647ms - 189058 Byte (100%)
gz[1] - 3.333ms - 44572 Byte (23.58%)
gz[2] - 3.519ms - 42685 Byte (22.58%)
gz[3] - 4.713ms - 40840 Byte (21.6%)
gz[4] - 5.274ms - 39111 Byte (20.69%)
gz[5] - 6.526ms - 37039 Byte (19.59%)
gz[6] - 8.036ms - 36206 Byte (19.15%)
gz[7] - 9.098ms - 35940 Byte (19.01%)
gz[8] - 12.87ms - 35713 Byte (18.89%)
gz[9] - 14.319ms - 35707 Byte (18.89%)
bz[1] - 40.282ms - 32247 Byte (17.06%)
bz[2] - 43.716ms - 29690 Byte (15.7%)
bz[3] - 43.765ms - 29690 Byte (15.7%)
bz[4] - 44.213ms - 29690 Byte (15.7%)
bz[5] - 43.704ms - 29690 Byte (15.7%)
bz[6] - 43.814ms - 29690 Byte (15.7%)
bz[7] - 43.934ms - 29690 Byte (15.7%)
bz[8] - 43.725ms - 29690 Byte (15.7%)
bz[9] - 45.129ms - 29690 Byte (15.7%)
bzcompress
(PHP 4 >= 4.3.3, PHP 5, PECL bz2:1.0)
bzcompress — Compress a string into bzip2 encoded data
Description
bzcompress() compresses the given string and returns it as bzip2 encoded data.
Parameters
- source
-
The string to compress.
- blocksize
-
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. blocksize defaults to 4.
- workfactor
-
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 and 30 being the default value.
Regardless of the workfactor , the generated output is the same.
Return Values
The compressed string or number of error in case of error.
Examples
Example #1 Compressing data
<?php
$str = "sample data";
$bzstr = bzcompress($str, 9);
echo $bzstr;
?>
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User Contributed Notesbzcompress
plasma
07-Sep-2008 08:39
07-Sep-2008 08:39