php - Access character in a string with square braces doesn't output correctly -

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i have string , want access ä character. outputs question mark instead of correct character.

here code. 

$array = array('ä', 'b', 'c'); $string = 'äbc'; echo $string; // äbc echo '<br />'; echo $string[0]; // ? echo '<br />'; echo $array[0]; // ä

demo

can tell me why?

updated

echo strlen($string); // returns 4 echo mb_substr($string, 0, 1); // ä

depending on charset, letter ä multi-byte letter. when access string using array access, returns first byte. in case of multi-byte ä returns non printable control character.

accessing array using array-access returns first element, regardless of it's length, in case multi-byte ä.


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