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@ 2019-11-19T07:46:37Z

<?php

class Foo
{
    public $id;
    
    public function __construct(){
        static $counter = 0;
        $this->id = $counter;
        ++$counter;
    }
}

$collection = [new Foo(), new Foo(), new Foo(), new Foo()];

print_r(array_column($collection, 'id'));

Output
Performance
VLD
References
Branches

array_column: documentation ( source)
print_r: documentation ( source)

preferences:dark modelive preview

27.83 ms | 402 KiB | 5 Q