328 lines
14 KiB
PHP
328 lines
14 KiB
PHP
|
<?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\VarDumper\Cloner;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @author Nicolas Grekas <p@tchwork.com>
|
||
|
|
*/
|
||
|
|
class VarCloner extends AbstractCloner
|
||
|
|
{
|
||
|
|
private static $gid;
|
||
|
|
private static $hashMask = 0;
|
||
|
|
private static $hashOffset = 0;
|
||
|
|
private static $arrayCache = array();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* {@inheritdoc}
|
||
|
|
*/
|
||
|
|
protected function doClone($var)
|
||
|
|
{
|
||
|
|
$len = 1; // Length of $queue
|
||
|
|
$pos = 0; // Number of cloned items past the minimum depth
|
||
|
|
$refsCounter = 0; // Hard references counter
|
||
|
|
$queue = array(array($var)); // This breadth-first queue is the return value
|
||
|
|
$indexedArrays = array(); // Map of queue indexes that hold numerically indexed arrays
|
||
|
|
$hardRefs = array(); // Map of original zval hashes to stub objects
|
||
|
|
$objRefs = array(); // Map of original object handles to their stub object couterpart
|
||
|
|
$resRefs = array(); // Map of original resource handles to their stub object couterpart
|
||
|
|
$values = array(); // Map of stub objects' hashes to original values
|
||
|
|
$maxItems = $this->maxItems;
|
||
|
|
$maxString = $this->maxString;
|
||
|
|
$minDepth = $this->minDepth;
|
||
|
|
$currentDepth = 0; // Current tree depth
|
||
|
|
$currentDepthFinalIndex = 0; // Final $queue index for current tree depth
|
||
|
|
$minimumDepthReached = 0 === $minDepth; // Becomes true when minimum tree depth has been reached
|
||
|
|
$cookie = (object) array(); // Unique object used to detect hard references
|
||
|
|
$a = null; // Array cast for nested structures
|
||
|
|
$stub = null; // Stub capturing the main properties of an original item value
|
||
|
|
// or null if the original value is used directly
|
||
|
|
|
||
|
|
if (!self::$hashMask) {
|
||
|
|
self::$gid = uniqid(mt_rand(), true); // Unique string used to detect the special $GLOBALS variable
|
||
|
|
self::initHashMask();
|
||
|
|
}
|
||
|
|
$gid = self::$gid;
|
||
|
|
$hashMask = self::$hashMask;
|
||
|
|
$hashOffset = self::$hashOffset;
|
||
|
|
$arrayStub = new Stub();
|
||
|
|
$arrayStub->type = Stub::TYPE_ARRAY;
|
||
|
|
$fromObjCast = false;
|
||
|
|
|
||
|
|
for ($i = 0; $i < $len; ++$i) {
|
||
|
|
// Detect when we move on to the next tree depth
|
||
|
|
if ($i > $currentDepthFinalIndex) {
|
||
|
|
++$currentDepth;
|
||
|
|
$currentDepthFinalIndex = $len - 1;
|
||
|
|
if ($currentDepth >= $minDepth) {
|
||
|
|
$minimumDepthReached = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$refs = $vals = $queue[$i];
|
||
|
|
if (\PHP_VERSION_ID < 70200 && empty($indexedArrays[$i])) {
|
||
|
|
// see https://wiki.php.net/rfc/convert_numeric_keys_in_object_array_casts
|
||
|
|
foreach ($vals as $k => $v) {
|
||
|
|
if (\is_int($k)) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
foreach (array($k => true) as $gk => $gv) {
|
||
|
|
}
|
||
|
|
if ($gk !== $k) {
|
||
|
|
$fromObjCast = true;
|
||
|
|
$refs = $vals = \array_values($queue[$i]);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
foreach ($vals as $k => $v) {
|
||
|
|
// $v is the original value or a stub object in case of hard references
|
||
|
|
$refs[$k] = $cookie;
|
||
|
|
if ($zvalIsRef = $vals[$k] === $cookie) {
|
||
|
|
$vals[$k] = &$stub; // Break hard references to make $queue completely
|
||
|
|
unset($stub); // independent from the original structure
|
||
|
|
if ($v instanceof Stub && isset($hardRefs[\spl_object_hash($v)])) {
|
||
|
|
$vals[$k] = $refs[$k] = $v;
|
||
|
|
if ($v->value instanceof Stub && (Stub::TYPE_OBJECT === $v->value->type || Stub::TYPE_RESOURCE === $v->value->type)) {
|
||
|
|
++$v->value->refCount;
|
||
|
|
}
|
||
|
|
++$v->refCount;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
$refs[$k] = $vals[$k] = new Stub();
|
||
|
|
$refs[$k]->value = $v;
|
||
|
|
$h = \spl_object_hash($refs[$k]);
|
||
|
|
$hardRefs[$h] = &$refs[$k];
|
||
|
|
$values[$h] = $v;
|
||
|
|
$vals[$k]->handle = ++$refsCounter;
|
||
|
|
}
|
||
|
|
// Create $stub when the original value $v can not be used directly
|
||
|
|
// If $v is a nested structure, put that structure in array $a
|
||
|
|
switch (true) {
|
||
|
|
case null === $v:
|
||
|
|
case \is_bool($v):
|
||
|
|
case \is_int($v):
|
||
|
|
case \is_float($v):
|
||
|
|
continue 2;
|
||
|
|
|
||
|
|
case \is_string($v):
|
||
|
|
if ('' === $v) {
|
||
|
|
continue 2;
|
||
|
|
}
|
||
|
|
if (!\preg_match('//u', $v)) {
|
||
|
|
$stub = new Stub();
|
||
|
|
$stub->type = Stub::TYPE_STRING;
|
||
|
|
$stub->class = Stub::STRING_BINARY;
|
||
|
|
if (0 <= $maxString && 0 < $cut = \strlen($v) - $maxString) {
|
||
|
|
$stub->cut = $cut;
|
||
|
|
$stub->value = \substr($v, 0, -$cut);
|
||
|
|
} else {
|
||
|
|
$stub->value = $v;
|
||
|
|
}
|
||
|
|
} elseif (0 <= $maxString && isset($v[1 + ($maxString >> 2)]) && 0 < $cut = \mb_strlen($v, 'UTF-8') - $maxString) {
|
||
|
|
$stub = new Stub();
|
||
|
|
$stub->type = Stub::TYPE_STRING;
|
||
|
|
$stub->class = Stub::STRING_UTF8;
|
||
|
|
$stub->cut = $cut;
|
||
|
|
$stub->value = \mb_substr($v, 0, $maxString, 'UTF-8');
|
||
|
|
} else {
|
||
|
|
continue 2;
|
||
|
|
}
|
||
|
|
$a = null;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case \is_array($v):
|
||
|
|
if (!$v) {
|
||
|
|
continue 2;
|
||
|
|
}
|
||
|
|
$stub = $arrayStub;
|
||
|
|
$stub->class = Stub::ARRAY_INDEXED;
|
||
|
|
|
||
|
|
$j = -1;
|
||
|
|
foreach ($v as $gk => $gv) {
|
||
|
|
if ($gk !== ++$j) {
|
||
|
|
$stub->class = Stub::ARRAY_ASSOC;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
$a = $v;
|
||
|
|
|
||
|
|
if (Stub::ARRAY_ASSOC === $stub->class) {
|
||
|
|
// Copies of $GLOBALS have very strange behavior,
|
||
|
|
// let's detect them with some black magic
|
||
|
|
$a[$gid] = true;
|
||
|
|
|
||
|
|
// Happens with copies of $GLOBALS
|
||
|
|
if (isset($v[$gid])) {
|
||
|
|
unset($v[$gid]);
|
||
|
|
$a = array();
|
||
|
|
foreach ($v as $gk => &$gv) {
|
||
|
|
$a[$gk] = &$gv;
|
||
|
|
}
|
||
|
|
unset($gv);
|
||
|
|
} else {
|
||
|
|
$a = $v;
|
||
|
|
}
|
||
|
|
} elseif (\PHP_VERSION_ID < 70200) {
|
||
|
|
$indexedArrays[$len] = true;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
case \is_object($v):
|
||
|
|
case $v instanceof \__PHP_Incomplete_Class:
|
||
|
|
if (empty($objRefs[$h = $hashMask ^ \hexdec(\substr(\spl_object_hash($v), $hashOffset, \PHP_INT_SIZE))])) {
|
||
|
|
$stub = new Stub();
|
||
|
|
$stub->type = Stub::TYPE_OBJECT;
|
||
|
|
$stub->class = \get_class($v);
|
||
|
|
$stub->value = $v;
|
||
|
|
$stub->handle = $h;
|
||
|
|
$a = $this->castObject($stub, 0 < $i);
|
||
|
|
if ($v !== $stub->value) {
|
||
|
|
if (Stub::TYPE_OBJECT !== $stub->type || null === $stub->value) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
$h = $hashMask ^ \hexdec(\substr(\spl_object_hash($stub->value), $hashOffset, \PHP_INT_SIZE));
|
||
|
|
$stub->handle = $h;
|
||
|
|
}
|
||
|
|
$stub->value = null;
|
||
|
|
if (0 <= $maxItems && $maxItems <= $pos && $minimumDepthReached) {
|
||
|
|
$stub->cut = \count($a);
|
||
|
|
$a = null;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (empty($objRefs[$h])) {
|
||
|
|
$objRefs[$h] = $stub;
|
||
|
|
} else {
|
||
|
|
$stub = $objRefs[$h];
|
||
|
|
++$stub->refCount;
|
||
|
|
$a = null;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
default: // resource
|
||
|
|
if (empty($resRefs[$h = (int) $v])) {
|
||
|
|
$stub = new Stub();
|
||
|
|
$stub->type = Stub::TYPE_RESOURCE;
|
||
|
|
if ('Unknown' === $stub->class = @\get_resource_type($v)) {
|
||
|
|
$stub->class = 'Closed';
|
||
|
|
}
|
||
|
|
$stub->value = $v;
|
||
|
|
$stub->handle = $h;
|
||
|
|
$a = $this->castResource($stub, 0 < $i);
|
||
|
|
$stub->value = null;
|
||
|
|
if (0 <= $maxItems && $maxItems <= $pos && $minimumDepthReached) {
|
||
|
|
$stub->cut = \count($a);
|
||
|
|
$a = null;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (empty($resRefs[$h])) {
|
||
|
|
$resRefs[$h] = $stub;
|
||
|
|
} else {
|
||
|
|
$stub = $resRefs[$h];
|
||
|
|
++$stub->refCount;
|
||
|
|
$a = null;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($a) {
|
||
|
|
if (!$minimumDepthReached || 0 > $maxItems) {
|
||
|
|
$queue[$len] = $a;
|
||
|
|
$stub->position = $len++;
|
||
|
|
} elseif ($pos < $maxItems) {
|
||
|
|
if ($maxItems < $pos += \count($a)) {
|
||
|
|
$a = \array_slice($a, 0, $maxItems - $pos);
|
||
|
|
if ($stub->cut >= 0) {
|
||
|
|
$stub->cut += $pos - $maxItems;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
$queue[$len] = $a;
|
||
|
|
$stub->position = $len++;
|
||
|
|
} elseif ($stub->cut >= 0) {
|
||
|
|
$stub->cut += \count($a);
|
||
|
|
$stub->position = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($arrayStub === $stub) {
|
||
|
|
if ($arrayStub->cut) {
|
||
|
|
$stub = array($arrayStub->cut, $arrayStub->class => $arrayStub->position);
|
||
|
|
$arrayStub->cut = 0;
|
||
|
|
} elseif (isset(self::$arrayCache[$arrayStub->class][$arrayStub->position])) {
|
||
|
|
$stub = self::$arrayCache[$arrayStub->class][$arrayStub->position];
|
||
|
|
} else {
|
||
|
|
self::$arrayCache[$arrayStub->class][$arrayStub->position] = $stub = array($arrayStub->class => $arrayStub->position);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($zvalIsRef) {
|
||
|
|
$refs[$k]->value = $stub;
|
||
|
|
} else {
|
||
|
|
$vals[$k] = $stub;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($fromObjCast) {
|
||
|
|
$fromObjCast = false;
|
||
|
|
$refs = $vals;
|
||
|
|
$vals = array();
|
||
|
|
$j = -1;
|
||
|
|
foreach ($queue[$i] as $k => $v) {
|
||
|
|
foreach (array($k => true) as $gk => $gv) {
|
||
|
|
}
|
||
|
|
if ($gk !== $k) {
|
||
|
|
$vals = (object) $vals;
|
||
|
|
$vals->{$k} = $refs[++$j];
|
||
|
|
$vals = (array) $vals;
|
||
|
|
} else {
|
||
|
|
$vals[$k] = $refs[++$j];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$queue[$i] = $vals;
|
||
|
|
}
|
||
|
|
|
||
|
|
foreach ($values as $h => $v) {
|
||
|
|
$hardRefs[$h] = $v;
|
||
|
|
}
|
||
|
|
|
||
|
|
return $queue;
|
||
|
|
}
|
||
|
|
|
||
|
|
private static function initHashMask()
|
||
|
|
{
|
||
|
|
$obj = (object) array();
|
||
|
|
self::$hashOffset = 16 - PHP_INT_SIZE;
|
||
|
|
self::$hashMask = -1;
|
||
|
|
|
||
|
|
if (defined('HHVM_VERSION')) {
|
||
|
|
self::$hashOffset += 16;
|
||
|
|
} else {
|
||
|
|
// check if we are nested in an output buffering handler to prevent a fatal error with ob_start() below
|
||
|
|
$obFuncs = array('ob_clean', 'ob_end_clean', 'ob_flush', 'ob_end_flush', 'ob_get_contents', 'ob_get_flush');
|
||
|
|
foreach (debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS) as $frame) {
|
||
|
|
if (isset($frame['function'][0]) && !isset($frame['class']) && 'o' === $frame['function'][0] && in_array($frame['function'], $obFuncs)) {
|
||
|
|
$frame['line'] = 0;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (!empty($frame['line'])) {
|
||
|
|
ob_start();
|
||
|
|
debug_zval_dump($obj);
|
||
|
|
self::$hashMask = (int) substr(ob_get_clean(), 17);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
self::$hashMask ^= hexdec(substr(spl_object_hash($obj), self::$hashOffset, PHP_INT_SIZE));
|
||
|
|
}
|
||
|
|
}
|