don't interpret strpos '0' as 'false' in while loop
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@ -657,7 +657,7 @@ class OC_Helper {
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public static function mb_str_replace($search, $replace, $subject, $encoding = 'UTF-8', &$count = null) {
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$offset = -1;
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$length = mb_strlen($search, $encoding);
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while(($i = mb_strrpos($subject, $search, $offset, $encoding))) {
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while(($i = mb_strrpos($subject, $search, $offset, $encoding)) !== false ) {
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$subject = OC_Helper::mb_substr_replace($subject, $replace, $i, $length);
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$offset = $i - mb_strlen($subject, $encoding) - 1;
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$count++;
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