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return false instead of empty string when -length is greater than (len - offset)

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This commit is contained in:
Antony Dovgal 2007-03-12 23:42:26 +00:00
parent c829314963
commit 81f99c721b
1 changed files with 4 additions and 0 deletions
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4
ext/standard/string.c
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@ -2077,6 +2077,10 @@ PHP_FUNCTION(substr)
RETURN_FALSE;
}
if (l < 0 && (l + Z_STRLEN_PP(str) - f) < 0) {
RETURN_FALSE;
}
/* if "from" position is negative, count start position from the end
* of the string
*/