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@ 2014-02-04T14:25:00Z

<?php
$json = (object) array(
  "uml" => "fü",
);

echo json_encode($json, JSON_UNESCAPED_UNICODE) . PHP_EOL;

echo json_encode($json) . PHP_EOL;

Output
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json_encode: documentation ( source)

preferences:dark modelive preview

48.56 ms | 402 KiB | 5 Q