Phar->startBuffering

(PECL phar:1.0.0-1.2.1)

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

说明

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.

范例

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();
?>


	PHP5中文手册 Phar->setStub Phar->stopBuffering phar PHP Manual Phar->startBuffering (PECL phar:1.0.0-1.2.1) Phar->startBuffering — Start buffering Phar write operations, do not modify the Phar object on disk 说明 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. 范例 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(); ?> 参见 Phar->stopBuffering() Phar->isBuffering() Phar->setStub Phar->stopBuffering phar PHP Manual

Phar->startBuffering

说明

范例

参见