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# Phar->startBuffering

(no version information, might be only in CVS)

Phar->startBuffering -- Start buffering Phar write operations, do not modify the Phar object on disk

## Descrição

void Phar->startBuffering ( void )

Although technically unnecessary, the 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 startBuffering()/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.

## Exemplos

Exemplo 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(); ?>`

## Veja também

Phar->stopBuffering()
Phar->isBuffering()

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