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run code in 300+ PHP versions simultaneously
<?php function getComments(int $parentId = null): array { $comments = [ ['id' => 1, 'parentId' => null, 'comment' => 'foo'], ['id' => 2, 'parentId' => null, 'comment' => 'bar'], ['id' => 3, 'parentId' => 1, 'comment' => 'foo 1'], ['id' => 4, 'parentId' => 1, 'comment' => 'foo 2'], ['id' => 5, 'parentId' => 4, 'comment' => 'foo 2-1'], ['id' => 6, 'parentId' => 2, 'comment' => 'foo bar'], ['id' => 7, 'parentId' => 5, 'comment' => 'foo 2-1-1'], ]; return array_filter($comments, fn (array $comment): bool => $comment['parentId'] === $parentId); } function showComments(?int $parentId = null, int $level = 0) { foreach (getComments($parentId) as $comment) { printf('%sComment id: %d - comment %s', str_repeat(' ', $level), $comment['id'], $comment['comment']); echo "\n"; showComments($comment['id'], $level + 1); } } showComments();
Output for 8.4.1 - 8.4.14
Deprecated: getComments(): Implicitly marking parameter $parentId as nullable is deprecated, the explicit nullable type must be used instead in /in/KPH2h on line 3 Comment id: 1 - comment foo Comment id: 3 - comment foo 1 Comment id: 4 - comment foo 2 Comment id: 5 - comment foo 2-1 Comment id: 7 - comment foo 2-1-1 Comment id: 2 - comment bar Comment id: 6 - comment foo bar
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.4, 8.3.6 - 8.3.27
Comment id: 1 - comment foo Comment id: 3 - comment foo 1 Comment id: 4 - comment foo 2 Comment id: 5 - comment foo 2-1 Comment id: 7 - comment foo 2-1-1 Comment id: 2 - comment bar Comment id: 6 - comment foo bar
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Comment id: 1 - comment foo Comment id: 3 - comment foo 1 Comment id: 4 - comment foo 2 Comment id: 5 - comment foo 2-1 Comment id: 7 - comment foo 2-1-1 Comment id: 2 - comment bar Comment id: 6 - comment foo bar
Output for 7.3.0 - 7.3.33
Parse error: syntax error, unexpected '$comment' (T_VARIABLE), expecting '(' in /in/KPH2h on line 14
Process exited with code 255.
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