bzcompress

bzcompress

(PHP 4 >= 4.0.4, PHP 5)

bzcompressCompress a string into bzip2 encoded data

说明

mixed bzcompress ( string $source [, int $blocksize = 4 [, int $workfactor = 0 ]] )

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

参数

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.

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.

Regardless of the workfactor, the generated output is the same.

返回值

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

范例

Example #1 Compressing data

<?php
$str 
"sample data";
$bzstr bzcompress($str9);
echo 
$bzstr;
?>

参见


  • bzclose
  • bzcompress
  • bzdecompress
  • bzerrno
  • bzerror
  • bzerrstr
  • bzflush
  • bzopen
  • bzread
  • bzwrite
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