Description:
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(PHP 5.3.2 (cli) (built: Aug  7 2010 00:04:41) 
Copyright (c) 1997-2010 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies)

When trying to extract a single character from a UTF-8-encoded Japanese string, instead of the expected character, one gets the dreaded black-diamond-question-mark-of-death.



Test script:
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$s_string = "静岡は蒸し暑いです。";
echo $s_string[3], "<p />";
// expected output is 蒸
// actual output is �
print_r($s_string[3]);
// expected output is 蒸
// actual output is �
echo "<p />";
$sub = substr($s_string, 3, 1);
echo $sub, "<p />";
// expected output is 蒸
// actual output is �

Expected result:
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Expected output is 蒸



Actual result:
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Actual output is �