Online PHP editor | output for Q6rG1

@ 2021-10-08T06:38:40Z

<?php

class Foo
{
    private array $elements = [];

    public function __construct(int $howMany)
    {
        for ($i = 0; $i < $howMany; $i++) {
            $this->elements[] = random_int(1, 100);
        }
    }


    public function getElements(): array
    {
        return $this->elements;
    }
    
    public function setElements(array $el): void {
        $this->elements = $el;
    }
}

class Demo
{
    public Foo $foo;

    public function __construct(int $howMany)
    {
        $this->foo = new Foo($howMany);
    }

    public function demo(): void
    {
        echo "\nWe start with ", count($this->foo->getElements()), " soldiers in \$foo->barArray\n"; 
        $this->removeElement();

        echo "\nWe have ", count($this->foo->getElements()), " soldiers in \$foo->barArray\n"; 
    }

    private function removeElement(): void
    {
        $elements = $this->foo->getElements();
        array_splice($elements, 2, 1);
        
        echo "\nWe have ", count($elements), " soldiers in local \$elements\n"; 

        $this->foo->setElements($elements);
    }
}

$init = random_int(4,10);
$demo = new Demo($init);
$demo->demo();

$remaining = count($demo->foo->getElements());

if ($init-1 !== $remaining) {
    throw new UnexpectedValueException('Wrong number of elements, application is broken');
}

Output for 7.4.9, 7.4.22, 8.0.3, 8.0.7, 8.0.11: We start with 8 soldiers in $foo->barArray We have 7 soldiers in local $elements We have 7 soldiers in $foo->barArray
Output for 7.4.0 - 7.4.1, 7.4.4, 7.4.12, 7.4.23 - 7.4.24, 8.0.2, 8.0.10: We start with 7 soldiers in $foo->barArray We have 6 soldiers in local $elements We have 6 soldiers in $foo->barArray
Output for 7.4.10, 7.4.13 - 7.4.14, 7.4.16 - 7.4.18, 7.4.21, 8.0.8 - 8.0.9: We start with 4 soldiers in $foo->barArray We have 3 soldiers in local $elements We have 3 soldiers in $foo->barArray
Output for 7.4.2 - 7.4.3, 7.4.8, 7.4.20, 8.0.1, 8.0.5 - 8.0.6: We start with 6 soldiers in $foo->barArray We have 5 soldiers in local $elements We have 5 soldiers in $foo->barArray
Output for 7.4.19, 8.0.0: We start with 9 soldiers in $foo->barArray We have 8 soldiers in local $elements We have 8 soldiers in $foo->barArray
Output for 7.4.5 - 7.4.6, 7.4.11, 7.4.15: We start with 5 soldiers in $foo->barArray We have 4 soldiers in local $elements We have 4 soldiers in $foo->barArray
Output for 7.4.7: We start with 10 soldiers in $foo->barArray We have 9 soldiers in local $elements We have 9 soldiers in $foo->barArray
Output for 7.3.0 - 7.3.31: Parse error: syntax error, unexpected 'array' (T_ARRAY), expecting function (T_FUNCTION) or const (T_CONST) in /in/Q6rG1 on line 5
Process exited with code 255.

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