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Asked: 2026-06-14T22:25:16+00:00

Here is the php code: $str='{key:’.chr(1).’}’; $json=json_decode($str); json_decode return null. So how should I

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Here is the php code:

$str='{"key":"'.chr(1).'"}';
$json=json_decode($str);

json_decode return null. So how should I process the $str in order to decode. (P.S. $str here is just a example, it may include chr(2), chr(10) and so on).

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1 Answer

  1. Editorial Team

    Only characters in the range U+0020-U+0021, U+0023-U+005B, U+005D-U+10FFFF may appear unescaped in strings. Any other character must be escaped using the Unicode escape sequence. In your case use \u0001 instead.

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