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@ 2023-08-21T23:06:47Z

<?php

class A {}
class B {}
class C {}
class D {}

class Z {
    use ConstructorParamDeprecationHelper; 
    public function __construct(
        protected A $a,
        protected C|B $c,
        protected D|C $d,
    ) {
        $this->deprecateParam(B::class, 'c', func_get_args());
        var_dump(get_class($this->a));
        var_dump(get_class($this->c));
        var_dump(get_class($this->d));
    }
}

new Z(new A(), new B(), new C(), new D());
new Z(new A(), new C(), new D());

trait ConstructorParamDeprecationHelper {
    function deprecateParam($className, $paramName, $args) {
        if ($this->$paramName instanceof $className) {
            trigger_error('A, B, C, D is deprecated, pass A, C, D instead', E_USER_DEPRECATED);
            
            $constructor = new ReflectionMethod($this, '__construct');
            $params = $constructor->getParameters();
            $position = array_search($paramName, array_column($params, 'name'));
            $move = array_slice($params, $position, NULL, TRUE);
            
            foreach ($move as $i => $param) {
                $this->{$param->getName()} = $args[$i + 1];
            }
        }
    }
}

Output for git.master: /bin/php-git-master: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-git-master) /bin/php-git-master: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-git-master)
Process exited with code 1.
Output for git.master_jit, rfc.property-hooks: Deprecated: A, B, C, D is deprecated, pass A, C, D instead in /in/MtHNJ on line 28 string(1) "A" string(1) "C" string(1) "D" string(1) "A" string(1) "C" string(1) "D"

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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