Try Rector Online | Rector - Automated Way to Instantly Upgrade and Refactor any PHP code

Run Rector on your code to see what it can do for you:

 <?php
 
 final class DemoFile
 {
-    public mixed $value {
-    	get {
+    public function __construct(public mixed $value {
+        get {
         	return $this->value;
-        }
+        }
         set {
             if ($this->optionUsedInValueSetter) {
             	$this->value = "changed value";
             }
             $this->value = $value;
-        }
-    }
-    
-    public function __construct(
-    	mixed $value,
-        bool $optionUsedInValueSetter = false,
-    ) {
-    	$this->value = $value;
+        }
+    }, bool $optionUsedInValueSetter = false)
+    {
     }
 }

PHP snippet to change

<?php

final class DemoFile
{
    public mixed $value {
    	get {
        	return $this->value;
        }
        set {
            if ($this->optionUsedInValueSetter) {
            	$this->value = "changed value";
            }
            $this->value = $value;
        }
    }
    
    public function __construct(
    	mixed $value,
        bool $optionUsedInValueSetter = false,
    ) {
    	$this->value = $value;
    }
}

Applied Rules:

ClassPropertyAssignToConstructorPromotionRector

Not a change you expect?

Create an issue on GitHub
...or to speed up fix – add a test fixture

Config rector.php

<?php

use Rector\Config\RectorConfig;
use Rector\TypeDeclaration\Rector\Property\TypedPropertyFromAssignsRector;
use Rector\ValueObject\PhpVersion;
use Rector\Php80\Rector\Class_\ClassPropertyAssignToConstructorPromotionRector;

return RectorConfig::configure()
    // A. whole set
    ->withPreparedSets(typeDeclarations: true)
    // B. or few rules
    ->withRules([
        TypedPropertyFromAssignsRector::class,
        ClassPropertyAssignToConstructorPromotionRector::class,
    ])
    // demonstrate specific PHP version
    ->withPhpVersion(PhpVersion::PHP_84);

Rector version: b09565 - released at 2026-05-25 06:37