Phar::startBuffering
(PHP >= 5.3.0, PECL phar >= 1.0.0)
Phar::startBuffering — Start buffering Phar write operations, do not modify the Phar object on disk
Description
public void Phar::startBuffering
( void
)
Although technically unnecessary, the Phar::startBuffering() method can provide a significant performance boost when creating or modifying a Phar archive with a large number of files. Ordinarily, every time a file within a Phar archive is created or modified in any way, the entire Phar archive will be recreated with the changes. In this way, the archive will be up-to-date with the activity performed on it.
However, this can be unnecessary when simply creating a new Phar archive, when it would make more sense to write the entire archive out at once. Similarly, it is often necessary to make a series of changes and to ensure that they all are possible before making any changes on disk, similar to the relational database concept of transactions. the Phar::startBuffering()/Phar::stopBuffering() pair of methods is provided for this purpose.
Phar write buffering is per-archive, buffering active for the foo.phar Phar archive does not affect changes to the bar.phar Phar archive.
Return Values
No value is returned.
Examples
Example #1 A Phar::startBuffering() example
<?php
// make sure it doesn't exist
@unlink('brandnewphar.phar');
try {
$p = new Phar(dirname(__FILE__) . '/brandnewphar.phar', 0, 'brandnewphar.phar');
} catch (Exception $e) {
echo 'Could not create phar:', $e;
}
echo 'The new phar has ' . $p->count() . " entries\n";
$p->startBuffering();
$p['file.txt'] = 'hi';
$p['file2.txt'] = 'there';
$p['file2.txt']->setCompressedGZ();
$p['file3.txt'] = 'babyface';
$p['file3.txt']->setMetadata(42);
$p->setStub("<?php
function __autoload($class)
{
include 'phar://myphar.phar/' . str_replace('_', '/', $class) . '.php';
}
Phar::mapPhar('myphar.phar');
include 'phar://myphar.phar/startup.php';
__HALT_COMPILER();");
$p->stopBuffering();
?>
See Also
- Phar::stopBuffering() - Stop buffering write requests to the Phar archive, and save changes to disk
- Phar::isBuffering() - Used to determine whether Phar write operations are being buffered, or are flushing directly to disk
- PHP Руководство
- Функции по категориям
- Индекс функций
- Справочник функций
- Расширения для сжатия и архивации
- Phar
- Функция Phar::addEmptyDir() - Add an empty directory to the phar archive
- Функция Phar::addFile() - Add a file from the filesystem to the phar archive
- Функция Phar::addFromString() - Add a file from the filesystem to the phar archive
- Функция Phar::apiVersion() - Returns the api version
- Функция Phar::buildFromDirectory() - Construct a phar archive from the files within a directory.
- Функция Phar::buildFromIterator() - Construct a phar archive from an iterator.
- Функция Phar::canCompress() - Returns whether phar extension supports compression using either zlib or bzip2
- Функция Phar::canWrite() - Returns whether phar extension supports writing and creating phars
- Функция Phar::compress() - Compresses the entire Phar archive using Gzip or Bzip2 compression
- Функция Phar::compressAllFilesBZIP2() - Compresses all files in the current Phar archive using Bzip2 compression
- Функция Phar::compressAllFilesGZ() - Compresses all files in the current Phar archive using Gzip compression
- Функция Phar::compressFiles() - Compresses all files in the current Phar archive
- Функция Phar::__construct() - Construct a Phar archive object
- Функция Phar::convertToData() - Convert a phar archive to a non-executable tar or zip file
- Функция Phar::convertToExecutable() - Convert a phar archive to another executable phar archive file format
- Функция Phar::copy() - Copy a file internal to the phar archive to another new file within the phar
- Функция Phar::count() - Returns the number of entries (files) in the Phar archive
- Функция Phar::createDefaultStub() - Create a phar-file format specific stub
- Функция Phar::decompress() - Decompresses the entire Phar archive
- Функция Phar::decompressFiles() - Decompresses all files in the current Phar archive
- Функция Phar::delMetadata() - Deletes the global metadata of the phar
- Функция Phar::delete() - Delete a file within a phar archive
- Функция Phar::extractTo() - Extract the contents of a phar archive to a directory
- Функция Phar::getMetadata() - Returns phar archive meta-data
- Функция Phar::getModified() - Return whether phar was modified
- Функция Phar::getSignature() - Return MD5/SHA1/SHA256/SHA512/OpenSSL signature of a Phar archive
- Функция Phar::getStub() - Return the PHP loader or bootstrap stub of a Phar archive
- Функция Phar::getSupportedCompression() - Return array of supported compression algorithms
- Функция Phar::getSupportedSignatures() - Return array of supported signature types
- Функция Phar::getVersion() - Return version info of Phar archive
- Функция Phar::hasMetadata() - Returns whether phar has global meta-data
- Функция Phar::interceptFileFuncs() - instructs phar to intercept fopen, file_get_contents, opendir, and all of the stat-related functions
- Функция Phar::isBuffering() - Used to determine whether Phar write operations are being buffered, or are flushing directly to disk
- Функция Phar::isCompressed() - Returns Phar::GZ or PHAR::BZ2 if the entire phar archive is compressed (.tar.gz/tar.bz and so on)
- Функция Phar::isFileFormat() - Returns true if the phar archive is based on the tar/phar/zip file format depending on the parameter
- Функция Phar::isValidPharFilename() - Returns whether the given filename is a valid phar filename
- Функция Phar::isWritable() - Returns true if the phar archive can be modified
- Функция Phar::loadPhar() - Loads any phar archive with an alias
- Функция Phar::mapPhar() - Reads the currently executed file (a phar) and registers its manifest
- Функция Phar::mount() - Mount an external path or file to a virtual location within the phar archive
- Функция Phar::mungServer() - Defines a list of up to 4 $_SERVER variables that should be modified for execution
- Функция Phar::offsetExists() - determines whether a file exists in the phar
- Функция Phar::offsetGet() - Gets a PharFileInfo object for a specific file
- Функция Phar::offsetSet() - set the contents of an internal file to those of an external file
- Функция Phar::offsetUnset() - remove a file from a phar
- Функция Phar::running() - Returns the full path on disk or full phar URL to the currently executing Phar archive
- Функция Phar::setAlias() - Set the alias for the Phar archive
- Функция Phar::setDefaultStub() - Used to set the PHP loader or bootstrap stub of a Phar archive to the default loader
- Функция Phar::setMetadata() - Sets phar archive meta-data
- Функция Phar::setSignatureAlgorithm() - set the signature algorithm for a phar and apply it.
- Функция Phar::setStub() - Used to set the PHP loader or bootstrap stub of a Phar archive
- Функция Phar::startBuffering() - Start buffering Phar write operations, do not modify the Phar object on disk
- Функция Phar::stopBuffering() - Stop buffering write requests to the Phar archive, and save changes to disk
- Функция Phar::uncompressAllFiles() - Uncompresses all files in the current Phar archive
- Функция Phar::unlinkArchive() - Completely remove a phar archive from disk and from memory
- Функция Phar::webPhar() - mapPhar for web-based phars. front controller for web applications
Коментарии
To setthe ini key phar.readonly to 0, from a unix shell script, this is possible on the fly it is possible see below.
The example given on this page has some issues with quoting: (See conversion to simple quotes)
#!/usr/bin/php -d phar.readonly=0
<?php
print(ini_get('phar.readonly')); // Must return 0
// make sure it doesn't exist
@unlink('brandnewphar.phar');
try {
$p = new Phar(dirname(__FILE__) . '/brandnewphar.phar', 0, 'brandnewphar.phar');
} catch (Exception $e) {
echo 'Could not create phar:', $e;
}
echo 'The new phar has ' . $p->count() . " entries\n";
$p->startBuffering();
$p['file.txt'] = 'hi';
$p['file2.txt'] = 'there';
$p['file2.txt']->compress(Phar::GZ);
$p['file3.txt'] = 'babyface';
$p['file3.txt']->setMetadata(42);
$p->setStub('<?php
function __autoload($class)
{
include "phar://myphar.phar/" . str_replace("_", "/", $class) . ".php";
}
Phar::mapPhar("myphar.phar");
include "phar://myphar.phar/startup.php";
__HALT_COMPILER();');
$p->stopBuffering();
// Test
$m = file_get_contents("phar://brandnewphar.phar/file2.txt");
$m = explode("\n",$m);
var_dump($m);
/* Output:
* there
**/