PharFileInfo::compress

(PHP >= 5.3.0, PECL phar >= 2.0.0)

PharFileInfo::compress — Compresses the current Phar entry with either zlib or bzip2 compression

说明

public bool PharFileInfo::compress ( int $compression )

This method compresses the file inside the Phar archive using either bzip2 compression or zlib compression. The bzip2 or zlib extension must be enabled to take advantage of this feature. In addition, if the file is already compressed, the respective extension must be enabled in order to decompress the file. As with all functionality that modifies the contents of a phar, the phar.readonly INI variable must be off in order to succeed if the file is within a Phar archive. Files within PharData archives do not have this restriction.

返回值

成功时返回 TRUE，或者在失败时返回 FALSE。

错误／异常

Throws BadMethodCallException if the phar.readonly INI variable is on, or if the bzip2/zlib extension is not available.

范例

Example #1 A PharFileInfo::compress() example


<?php
try {
    $p = new Phar('/path/to/my.phar', 0, 'my.phar');
    $p['myfile.txt'] = 'hi';
    $file = $p['myfile.txt'];
    var_dump($file->isCompressed(Phar::BZ2));
    $p['myfile.txt']->compress(Phar::BZ2);
    var_dump($file->isCompressed(Phar::BZ2));
} catch (Exception $e) {
    echo 'Create/modify operations on my.phar failed: ', $e;
}
?>

以上例程会输出：

bool(false)
bool(true)

参见

PharFileInfo::getCompressedSize() - Returns the actual size of the file (with compression) inside the Phar archive
PharFileInfo::isCompressed() - Returns whether the entry is compressed
PharFileInfo::decompress() - Decompresses the current Phar entry within the phar
Phar::canCompress() - Returns whether phar extension supports compression using either zlib or bzip2
Phar::isCompressed() - Returns Phar::GZ or PHAR::BZ2 if the entire phar archive is compressed (.tar.gz/tar.bz and so on)
Phar::compressFiles() - Compresses all files in the current Phar archive
Phar::decompressFiles() - Decompresses all files in the current Phar archive
Phar::compress() - Compresses the entire Phar archive using Gzip or Bzip2 compression
Phar::decompress() - Decompresses the entire Phar archive
Phar::getSupportedCompression() - Return array of supported compression algorithms