3v4l.org

run code in 300+ PHP versions simultaneously
<?php $blogPosts = [ [ "id" => 0, "title" => "first blogpost", "content" => "blogpost text" ], [ "id" => 1, "title" => "second blogpost", "content" => "blogpost 2 text" ], ]; $comment = [ "user" => "myusername", "comment" => "first post was better!" ]; $blogPostIds = [0,1,1]; foreach ($blogPostIds as $blogPostId) { $blogPosts = array_map(function ($blogPost) use ($blogPostId, $comment) { if ($blogPost["id"] === $blogPostId) { isset($blogPost["comments"]) ? $blogPost["comments"][] = $comment : $blogPost["comments"] = [$comment]; return $blogPost; } return $blogPost; }, $blogPosts); } print_r($blogPosts);
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 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7
Array ( [0] => Array ( [id] => 0 [title] => first blogpost [content] => blogpost text [comments] => Array ( [0] => Array ( [user] => myusername [comment] => first post was better! ) ) ) [1] => Array ( [id] => 1 [title] => second blogpost [content] => blogpost 2 text [comments] => Array ( [0] => Array ( [user] => myusername [comment] => first post was better! ) [1] => Array ( [user] => myusername [comment] => first post was better! ) ) ) )
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 Array ( [0] => Array ( [id] => 0 [title] => first blogpost [content] => blogpost text [comments] => Array ( [0] => Array ( [user] => myusername [comment] => first post was better! ) ) ) [1] => Array ( [id] => 1 [title] => second blogpost [content] => blogpost 2 text [comments] => Array ( [0] => Array ( [user] => myusername [comment] => first post was better! ) [1] => Array ( [user] => myusername [comment] => first post was better! ) ) ) )

preferences:
134.27 ms | 404 KiB | 214 Q