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Editorial Team
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Asked: 2026-06-12T07:58:33+00:00

According to bin2hex my PHP is internally using UTF-8: echo bin2hex(ö); -> c3b6 (utf-8)

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According to bin2hex my PHP is internally using UTF-8:

echo bin2hex("ö"); -> c3b6 (utf-8)
echo bin2hex(utf8_decode("ö")); -> f6 (ISO-8859)

But both mb_internal_encoding() and iconv_get_encoding() say it is ISO-8859-1.

echo mb_internal_encoding(); -> ISO-8859-1
var_dump(iconv_get_encoding()); ->  ["input_encoding"]=>  string(10) "ISO-8859-1"  ["output_encoding"]=>  string(10) "ISO-8859-1"  ["internal_encoding"]=>  string(10) "ISO-8859-1"

UTF-8 seems to apparently be the one it’s using, but why is it showing ISO-8859-1 anyway?

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1 Answer

  1. Editorial Team

    This is not strange at all. Your first check is for what is between the quotes. I assume you have saved the file using UTF-8 which means you have two bytes in your string. This does not imply that the internal encoding is UTF-8, just that you have those two bytes in you string.

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