php中时间日期格式化函数

function format_date( $STRING1 )
{
        $STRING1 = str_replace( "-0", "-", $STRING1 );
        $STR = strtok( $STRING1, "-" );
        $STRING2 = $STR."年";
        $STR = strtok( "-" );
        $STRING2 .= $STR."月";
        $STR = strtok( " " );
        $STRING2 .= $STR."日";
        return $STRING2;
}

function format_date_short1( $STRING1 )
{
        $STRING1 = str_replace( "-0", "-", $STRING1 );
        $STR = strtok( $STRING1, "-" );
        $STRING2 = $STR."年";
        $STR = strtok( "-" );
        $STRING2 .= $STR."月";
        return $STRING2;
}

function format_date_short2( $STRING1 )
{
        $STRING1 = str_replace( "-0", "-", $STRING1 );
        $STR = strtok( $STRING1, "-" );
        $STR = strtok( "-" );
        $STRING2 .= $STR."月";
        $STR = strtok( " " );
        $STRING2 .= $STR."日";
        return $STRING2;
}

function format_date_short3( $STRING1 )
{
        $STRING1 = str_replace( "-0", "-", $STRING1 );
        $STR = strtok( $STRING1, "-" );
        $STRING2 .= $STR."年";
        return $STRING2;
}

function format_date_number( $STRING1 )
{
        $STRING1 = str_replace( "-0", "-", $STRING1 );
        $STR = strtok( $STRING1, "-" );
        $STRING2 = $STR;
        $STR = strtok( "-" );
        $STRING2 .= strlen( $STR ) == 1 ? "0".$STR : $STR;
        $STR = strtok( " " );
        $STRING2 .= strlen( $STR ) == 1 ? "0".$STR : $STR;
        return $STRING2;
}

function get_week( $STRING )
{
        switch ( date( "w", strtotime( $STRING ) ) )
        {
        case 0 :
                return "日";
        case 1 :
                return "一";
        case 2 :
                return "二";
        case 3 :
                return "三";
        case 4 :
                return "四";
        case 5 :
                return "五";
        case 6 :
                return "六";
        }
}