RSS2.0
ソース：
$str = "hankaku+全角文字列"; echo strlen($str) . "¥n"; echo mb_strlen($str, "EUC-JP") . "¥n"; echo substr($str,7,4) . "¥n"; echo mb_substr($str,7,4,"EUC-JP") . "¥n"; echo mb_strcut($str,7,4,"EUC-JP") . "¥n"; echo mb_strcut($str,14,4,"EUC-JP") . "¥n";
結果：
18 13 +全�(文字化け) +全角文 +全 字列
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