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get_defined_vars() return type contains know variables #3624

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Nov 29, 2024
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get_defined_vars() return type contains know variables #3624

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5 changes: 5 additions & 0 deletions conf/config.neon
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Original file line number Diff line number Diff line change
Expand Up @@ -1525,6 +1525,11 @@ services:
tags:
- phpstan.broker.dynamicFunctionReturnTypeExtension

-
class: PHPStan\Type\Php\GetDefinedVarsFunctionReturnTypeExtension
tags:
- phpstan.broker.dynamicFunctionReturnTypeExtension

-
class: PHPStan\Type\Php\GetParentClassDynamicFunctionReturnTypeExtension
tags:
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46 changes: 46 additions & 0 deletions src/Type/Php/GetDefinedVarsFunctionReturnTypeExtension.php
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Original file line number Diff line number Diff line change
@@ -0,0 +1,46 @@
<?php declare(strict_types = 1);

namespace PHPStan\Type\Php;

use PhpParser\Node\Expr\FuncCall;
use PHPStan\Analyser\Scope;
use PHPStan\Reflection\FunctionReflection;
use PHPStan\Type\ArrayType;
use PHPStan\Type\Constant\ConstantArrayTypeBuilder;
use PHPStan\Type\Constant\ConstantStringType;
use PHPStan\Type\DynamicFunctionReturnTypeExtension;
use PHPStan\Type\MixedType;
use PHPStan\Type\StringType;
use PHPStan\Type\Type;

final class GetDefinedVarsFunctionReturnTypeExtension implements DynamicFunctionReturnTypeExtension
{

public function isFunctionSupported(FunctionReflection $functionReflection): bool
{
return $functionReflection->getName() === 'get_defined_vars';
}

public function getTypeFromFunctionCall(FunctionReflection $functionReflection, FuncCall $functionCall, Scope $scope): Type
{
if ($scope->canAnyVariableExist()) {
return new ArrayType(
new StringType(),
new MixedType(),
);
}

$typeBuilder = ConstantArrayTypeBuilder::createEmpty();

foreach ($scope->getDefinedVariables() as $variable) {
$typeBuilder->setOffsetValueType(new ConstantStringType($variable), $scope->getVariableType($variable), false);
}

foreach ($scope->getMaybeDefinedVariables() as $variable) {
$typeBuilder->setOffsetValueType(new ConstantStringType($variable), $scope->getVariableType($variable), true);
}

return $typeBuilder->getArray();
}

}
46 changes: 46 additions & 0 deletions tests/PHPStan/Analyser/nsrt/get-defined-vars.php
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@@ -0,0 +1,46 @@
<?php

namespace GetDefinedVars;

use function PHPStan\Testing\assertType;

$global = "foo";

assertType('array<string, mixed>', get_defined_vars()); // any variable can exist

function doFoo(int $param) {
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$local = "foo";
assertType('array{param: int, local: \'foo\'}', get_defined_vars());
assertType('array{\'param\', \'local\'}', array_keys(get_defined_vars()));
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Comment on lines +13 to +14
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@ruudk ruudk Nov 13, 2024 •
edited
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When escaping single quotes, I always (when possible) switch to double quoted string to prevent that.

  • easier on the eyes
  • easier to copy and paste
  • easier to search for the unescaped string in the codebase
Suggested change
assertType('array{param: int, local: \'foo\'}', get_defined_vars());
assertType('array{\'param\', \'local\'}', array_keys(get_defined_vars()));
assertType("array{param: int, local: 'foo'}", get_defined_vars());
assertType("array{'param', 'local'}", array_keys(get_defined_vars()));

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I do that too but I checked how it is done in other parts of PHPStan and found out that escaping seems to be standard here.

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@herndlm herndlm Nov 13, 2024 •
edited
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I also often do the double quote. but I think in general it's very inconsistent :D not sure if such thing exists, but a coding standard rule might be good for this 😊
UPDATE: on the other hand - in those tests files it wouldn't be enforced anyway I guess..

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We use https://github.com/rectorphp/rector/blob/main/docs/rector_rules_overview.md#symplifyquoteescaperector and it works good

}

function doBar(int $param) {
global $global;
$local = "foo";
assertType('array{param: int, global: mixed, local: \'foo\'}', get_defined_vars());
assertType('array{\'param\', \'global\', \'local\'}', array_keys(get_defined_vars()));
}

function doConditional(int $param) {
$local = "foo";
if(true) {
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$conditional = "bar";
assertType('array{param: int, local: \'foo\', conditional: \'bar\'}', get_defined_vars());
} else {
$other = "baz";
assertType('array{param: int, local: \'foo\', other: \'baz\'}', get_defined_vars());
}
assertType('array{param: int, local: \'foo\', conditional: \'bar\'}', get_defined_vars());
}

function doRandom(int $param) {
$local = "foo";
if(rand(0, 1)) {
$random1 = "bar";
assertType('array{param: int, local: \'foo\', random1: \'bar\'}', get_defined_vars());
} else {
$random2 = "baz";
assertType('array{param: int, local: \'foo\', random2: \'baz\'}', get_defined_vars());
}
assertType('array{param: int, local: \'foo\', random2?: \'baz\', random1?: \'bar\'}', get_defined_vars());
}
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