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php:依据中文裁减字符串函数方法

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2016-06-13 11:34:48747browse

php:根据中文裁减字符串函数方法

    define(CHARSET, 'UTF-8'); // 系统默认编码    /**     * 根据中文裁减字符串     * @param $string - 字符串     * @param $length - 长度     * @param $doc - 缩略后缀     * @return 返回带省略号被裁减好的字符串     */    function cutstr( $string, $length, $dot = '...' ) {        if ( strlen( $string ) ' ), array( $pre . '&' . $end, $pre . '"' . $end, $pre . '' . $end ), $string );        $strcut = '';        if ( strtolower( CHARSET ) == 'utf-8' ) {            $n = $tn = $noc = 0;            while ( $n = $length ) {                    break;                }            }            if ( $noc > $length ) {                $n -= $tn;            }            $strcut = substr( $string, 0, $n );        } else {            for ( $i = 0; $i  127 ? $string[$i] . $string[++$i] : $string[$i];            }        }        $strcut = str_replace( array( $pre . '&' . $end, $pre . '"' . $end, $pre . '' . $end ), array( '&', '"', '' ), $strcut );        $pos = strrpos( $strcut, chr( 1 ) );        if ( $pos !== false ) {            $strcut = substr( $strcut, 0, $pos );        }        return $strcut . $dot;    }

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