VarExporter.php
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\VarExporter;
use Symfony\Component\VarExporter\Exception\ExceptionInterface;
use Symfony\Component\VarExporter\Internal\Exporter;
use Symfony\Component\VarExporter\Internal\Hydrator;
use Symfony\Component\VarExporter\Internal\Registry;
use Symfony\Component\VarExporter\Internal\Values;
/**
* Exports serializable PHP values to PHP code.
*
* VarExporter allows serializing PHP data structures to plain PHP code (like var_export())
* while preserving all the semantics associated with serialize() (unlike var_export()).
*
* By leveraging OPcache, the generated PHP code is faster than doing the same with unserialize().
*
* @author Nicolas Grekas <p@tchwork.com>
*/
final class VarExporter
{
/**
* Exports a serializable PHP value to PHP code.
*
* @param mixed $value The value to export
* @param bool &$isStaticValue Set to true after execution if the provided value is static, false otherwise
*
* @return string The value exported as PHP code
*
* @throws ExceptionInterface When the provided value cannot be serialized
*/
public static function export($value, bool &$isStaticValue = null): string
{
$isStaticValue = true;
if (!\is_object($value) && !(\is_array($value) && $value) && !$value instanceof \__PHP_Incomplete_Class && !\is_resource($value)) {
return Exporter::export($value);
}
$objectsPool = new \SplObjectStorage();
$refsPool = [];
$objectsCount = 0;
try {
$value = Exporter::prepare([$value], $objectsPool, $refsPool, $objectsCount, $isStaticValue)[0];
} finally {
$references = [];
foreach ($refsPool as $i => $v) {
if ($v[0]->count) {
$references[1 + $i] = $v[2];
}
$v[0] = $v[1];
}
}
if ($isStaticValue) {
return Exporter::export($value);
}
$classes = [];
$values = [];
$states = [];
foreach ($objectsPool as $i => $v) {
[, $classes[], $values[], $wakeup] = $objectsPool[$v];
if (0 < $wakeup) {
$states[$wakeup] = $i;
} elseif (0 > $wakeup) {
$states[-$wakeup] = [$i, array_pop($values)];
$values[] = [];
}
}
ksort($states);
$wakeups = [null];
foreach ($states as $k => $v) {
if (\is_array($v)) {
$wakeups[-$v[0]] = $v[1];
} else {
$wakeups[] = $v;
}
}
if (null === $wakeups[0]) {
unset($wakeups[0]);
}
$properties = [];
foreach ($values as $i => $vars) {
foreach ($vars as $class => $values) {
foreach ($values as $name => $v) {
$properties[$class][$name][$i] = $v;
}
}
}
if ($classes || $references) {
$value = new Hydrator(new Registry($classes), $references ? new Values($references) : null, $properties, $value, $wakeups);
} else {
$isStaticValue = true;
}
return Exporter::export($value);
}
}