晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 sh-3ll

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DIR:/opt/cpanel/ea-wappspector/vendor/rector/rector/rules/DeadCode/SideEffect/
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Current File : //opt/cpanel/ea-wappspector/vendor/rector/rector/rules/DeadCode/SideEffect/PureFunctionDetector.php
<?php

declare (strict_types=1);
namespace Rector\DeadCode\SideEffect;

use PhpParser\Node\Expr\FuncCall;
use PhpParser\Node\Name;
use PHPStan\Analyser\Scope;
use PHPStan\Reflection\Native\NativeFunctionReflection;
use PHPStan\Reflection\ReflectionProvider;
use Rector\NodeNameResolver\NodeNameResolver;
final class PureFunctionDetector
{
    /**
     * @readonly
     * @var \Rector\NodeNameResolver\NodeNameResolver
     */
    private $nodeNameResolver;
    /**
     * @readonly
     * @var \PHPStan\Reflection\ReflectionProvider
     */
    private $reflectionProvider;
    public function __construct(NodeNameResolver $nodeNameResolver, ReflectionProvider $reflectionProvider)
    {
        $this->nodeNameResolver = $nodeNameResolver;
        $this->reflectionProvider = $reflectionProvider;
    }
    public function detect(FuncCall $funcCall, Scope $scope) : bool
    {
        $funcCallName = $this->nodeNameResolver->getName($funcCall);
        if ($funcCallName === null) {
            return \false;
        }
        $name = new Name($funcCallName);
        $hasFunction = $this->reflectionProvider->hasFunction($name, $scope);
        if (!$hasFunction) {
            return \false;
        }
        $functionReflection = $this->reflectionProvider->getFunction($name, $scope);
        if (!$functionReflection instanceof NativeFunctionReflection) {
            return \false;
        }
        // yes() and maybe() may have side effect
        return $functionReflection->hasSideEffects()->no();
    }
}