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Editing: GetAttrExpression.php

<?php

/*
 * This file is part of Twig.
 *
 * (c) Fabien Potencier
 * (c) Armin Ronacher
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Twig\Node\Expression;

use Twig\Compiler;
use Twig\Extension\SandboxExtension;
use Twig\Template;

class GetAttrExpression extends AbstractExpression
{
    public function __construct(AbstractExpression $node, AbstractExpression $attribute, ?AbstractExpression $arguments, string $type, int $lineno)
    {
        $nodes = ['node' => $node, 'attribute' => $attribute];
        if (null !== $arguments) {
            $nodes['arguments'] = $arguments;
        }

parent::__construct($nodes, ['type' => $type, 'is_defined_test' => false, 'ignore_strict_check' => false, 'optimizable' => true], $lineno);
    }

public function compile(Compiler $compiler): void
    {
        $env = $compiler->getEnvironment();

// optimize array calls
        if (
            $this->getAttribute('optimizable')
            && (!$env->isStrictVariables() || $this->getAttribute('ignore_strict_check'))
            && !$this->getAttribute('is_defined_test')
            && Template::ARRAY_CALL === $this->getAttribute('type')
        ) {
            $var = '$'.$compiler->getVarName();
            $compiler
                ->raw('(('.$var.' = ')
                ->subcompile($this->getNode('node'))
                ->raw(') && is_array(')
                ->raw($var)
                ->raw(') || ')
                ->raw($var)
                ->raw(' instanceof ArrayAccess ? (')
                ->raw($var)
                ->raw('[')
                ->subcompile($this->getNode('attribute'))
                ->raw('] ?? null) : null)')
            ;

return;
        }

$compiler->raw('twig_get_attribute($this->env, $this->source, ');

if ($this->getAttribute('ignore_strict_check')) {
            $this->getNode('node')->setAttribute('ignore_strict_check', true);
        }

$compiler
            ->subcompile($this->getNode('node'))
            ->raw(', ')
            ->subcompile($this->getNode('attribute'))
        ;

if ($this->hasNode('arguments')) {
            $compiler->raw(', ')->subcompile($this->getNode('arguments'));
        } else {
            $compiler->raw(', []');
        }

$compiler->raw(', ')
            ->repr($this->getAttribute('type'))
            ->raw(', ')->repr($this->getAttribute('is_defined_test'))
            ->raw(', ')->repr($this->getAttribute('ignore_strict_check'))
            ->raw(', ')->repr($env->hasExtension(SandboxExtension::class))
            ->raw(', ')->repr($this->getNode('node')->getTemplateLine())
            ->raw(')')
        ;
    }
}

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