php 截圖中文字串帶省略號
阿新 • • 發佈:2019-02-04
/** * 字串擷取,支援中文和其他編碼 * @static * @access public * @param string $str 需要轉換的字串 * @param string $start 開始位置 * @param string $length 擷取長度 * @param string $charset 編碼格式 * @param string $suffix 截斷顯示字元 * @return string */ function msubstr($str, $start = 0, $length, $charset = "utf-8", $suffix = true){ if (function_exists("mb_substr")) $slice = mb_substr($str, $start, $length, $charset); elseif (function_exists('iconv_substr')) { $slice = iconv_substr($str, $start, $length, $charset); if (false === $slice) { $slice = ''; } } else { $re['utf-8'] = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|[\xe0-\xef][\x80-\xbf]{2}|[\xf0-\xff][\x80-\xbf]{3}/"; $re['gb2312'] = "/[\x01-\x7f]|[\xb0-\xf7][\xa0-\xfe]/"; $re['gbk'] = "/[\x01-\x7f]|[\x81-\xfe][\x40-\xfe]/"; $re['big5'] = "/[\x01-\x7f]|[\x81-\xfe]([\x40-\x7e]|\xa1-\xfe])/"; preg_match_all($re[$charset], $str, $match); $slice = join("", array_slice($match[0], $start, $length)); } //字數不滿不新增... $count = mb_strlen($str, 'utf-8'); if ($count > $length) { return $suffix ? $slice . '...' : $slice; } else { return $slice; } }