Online PHP editor | output for Fevli

@ 2020-02-28T15:34:20Z

<?php

class Foo
{
    public $bar = 1;
    
    public function bar(?int $bar = null): Foo
    {
        $this->bar = $bar ?? $this->bar;
        
        return $this;
    }
    
    public function copy(?int $bar = null): Foo
    {
        return $this->fork()->bar($bar ?? $this->bar);
    }
    
    public function fork(): Foo
    {
        return clone $this;
    }
}

$a = new foo();
$a2 = $a->copy();
$b = $a->copy(2);
$b2 = $a->copy();
$c = $b->copy(3);
$c2 = $b->copy();

var_dump(
    $a->bar,
    $a2->bar,
    $b->bar,
    $b2->bar,
    $c->bar,
    $c2->bar
);

Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0: int(1) int(1) int(2) int(1) int(3) int(2)
Output for 8.4.15: /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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