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<?php function assignArrayByPath(&$result, $path, $value) { foreach (explode('_', $path) as $key) { $result = &$result[$key]; } $result = $value; } $array = [ 'max_size_video' => 50000, 'max_size_photo' => 8000, 'token_expire' => 100, 'dns' => 'mydns.fr', ]; $result = []; foreach ($array as $key => $value) { assignArrayByPath($result, $key, $value); } var_export($result);
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.29, 8.0.0 - 8.0.19, 8.1.0 - 8.1.6
array ( 'max' => array ( 'size' => array ( 'video' => 50000, 'photo' => 8000, ), ), 'token' => array ( 'expire' => 100, ), 'dns' => 'mydns.fr', )

preferences:
57.84 ms | 409 KiB | 5 Q