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@ 2024-04-19T19:15:47Z

<?php

abstract class Expression
{
    protected function escapeStringLiteral(string $value): string
    {
        return 'never called';
    }
}

trait ExpressionTrait
{
    protected function escapeStringLiteral(string $value): string
    {
        return '\'' . str_replace('\'', '\'\'', $value) . '\'';
    }
}

class MyExpression extends Expression
{
    use ExpressionTrait;
}

class TestExpression extends Expression
{
    private Expression $dummyExpression;

    public function __construct(Expression $dummyExpression)
    {
        $this->dummyExpression = $dummyExpression;
    }

    #[\Override]
    protected function escapeStringLiteral(string $value): string
    {
        return $this->dummyExpression->escapeStringLiteral($value);
    }
    
    public function test(): void
    {
        var_dump($this->escapeStringLiteral('foo \' bar'));
    }
};

class TestCl
{
    public function test(): void
    {
        $exprNoRender = new TestExpression(new MyExpression());
        
        $exprNoRender->test();
    }
}

(new TestCl())->test();

Output for git.master_jit, git.master, rfc.property-hooks: Fatal error: Uncaught Error: Call to protected method MyExpression::escapeStringLiteral() from scope TestExpression in /in/KI9eF:36 Stack trace: #0 /in/KI9eF(41): TestExpression->escapeStringLiteral('foo ' bar') #1 /in/KI9eF(51): TestExpression->test() #2 /in/KI9eF(55): TestCl->test() #3 {main} thrown in /in/KI9eF on line 36
Process exited with code 255.

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2022-12-01 RFC: Property hooks - included in PHP 8.4
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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