3v4l.org

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<?php declare(strict_types = 1); $a = ['net' => ['domain' => ['www' => null, 'shit' => null]]]; function walk(array $a, string $stem = ''): Generator { foreach ($a as $k => $v) { $current = $stem ? "$stem.$k" : $k; if (is_array($v)) { yield from walk($v, $current); } else { yield $current; } } } foreach (walk($a) as $domain) { print "$domain\n"; }
Output for 7.0.0 - 7.0.33, 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
net.domain.www net.domain.shit
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Warning: Unsupported declare 'strict_types' in /in/A6l2C on line 1 Fatal error: Default value for parameters with a class type hint can only be NULL in /in/A6l2C on line 5
Process exited with code 255.

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