php搜尋中文字

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<?
mb_internal_encoding('UTF-8');
$output =  "123中文測試...";
$pos = mb_strpos($output, "中文");
$output = substr($output, $pos);
echo $output;
?>

<? mb_internal_encoding('UTF-8'); $output = "123中文測試..."; $pos = mb_strpos($output, "中文"); $output = substr($output, $pos); echo $output; ?>