Online PHP editor | output for 1uVYf

@ 2019-05-14T07:03:12Z

<?php
declare(strict_types=1);

error_reporting(-1);
ini_set('display_errors', 'On');

class Foo
{
    public $id;

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

$foos = [new Foo(1), new Foo(2), new Foo(3), new Foo(4)];
$fooIds = [1, 2, 3, 4];

$diff = array_udiff($foos, $fooIds, function ($a, $b) {
    echo gettype($a), ' <=> ', gettype($b), "\n";

    if ($a instanceof Foo && $b instanceof Foo) {
        return $a->id <=> $b->id;
    }

    if ($a instanceof Foo) {
        return $a->id <=> $b;
    }

    if ($b instanceof Foo) {
        return $a <=> $b->id;
    }

    return $a <=> $b;
});

print_r($diff);  // expected result: an empty array

Output for 7.1.0 - 7.1.33, 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 - 8.5.1: object <=> object object <=> object object <=> object integer <=> integer integer <=> integer integer <=> integer object <=> integer object <=> object object <=> integer object <=> object object <=> integer object <=> object object <=> integer Array ( )
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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