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/** * * 中文字符串截取 * @param string $string * @param int $sublen * @param int $start * @param string $code */ function substr_zh ( $string, $sublen, $start = 0, $code = 'UTF-8' ) { if ( $code == 'UTF-8' ) { $pa = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xef][\x80-\xbf][\x80-\xbf]|\xf0[\x90-\xbf][\x80-\xbf][\x80-\xbf]|[\xf1-\xf7][\x80-\xbf][\x80-\xbf][\x80-\xbf]/"; preg_match_all ( $pa, $string, $t_string ); if ( count ( $t_string[0] ) - $start > $sublen ) return join ( '', array_slice ( $t_string[0], $start, $sublen ) ) . "..."; return join ( '', array_slice ( $t_string[0], $start, $sublen ) ); } else { $start = $start * 2; $sublen = $sublen * 2; $strlen = strlen ( $string ); $tmpstr = ''; for ( $i = 0; $i < $strlen; $i ++ ) { if ( $i >= $start && $i < ( $start + $sublen ) ) { if ( ord ( substr ( $string, $i, 1 ) ) > 129 ) { $tmpstr .= substr ( $string, $i, 2 ); } else { $tmpstr .= substr ( $string, $i, 1 ); } } if ( ord ( substr ( $string, $i, 1 ) ) > 129 ) $i ++; } if ( strlen ( $tmpstr ) < $strlen ) $tmpstr .= "..."; return $tmpstr; } }