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