CDateTimeParser

所有包 | 方法

包	system.utils
继承	class CDateTimeParser
可用自	1.0
源码	framework/utils/CDateTimeParser.php

CDateTimeParser converts a date/time string to a UNIX timestamp according to the specified pattern.

The following pattern characters are recognized:

Pattern |      Description
----------------------------------------------------
d       | Day of month 1 to 31, no padding
dd      | Day of month 01 to 31, zero leading
M       | Month digit 1 to 12, no padding
MM      | Month digit 01 to 12, zero leading
MMM     | Abbreviation representation of month (available since 1.1.11; locale aware since 1.1.13)
MMMM    | Full name representation (available since 1.1.13; locale aware)
y       | 4 year digit, e.g., 2005 (available since 1.1.16)
yy      | 2 year digit, e.g., 96, 05
yyyy    | 4 year digit, e.g., 2005
h       | Hour in 0 to 12, no padding
hh      | Hour in 00 to 12, zero leading
H       | Hour in 0 to 23, no padding
HH      | Hour in 00 to 23, zero leading
m       | Minutes in 0 to 59, no padding
mm      | Minutes in 00 to 59, zero leading
s       | Seconds in 0 to 59, no padding
ss      | Seconds in 00 to 59, zero leading
a       | AM or PM, case-insensitive (since version 1.1.5)
?       | matches any character (wildcard) (since version 1.1.11)
----------------------------------------------------

All other characters must appear in the date string at the corresponding positions.

For example, to parse a date string '21/10/2008', use the following:

$timestamp=CDateTimeParser::parse('21/10/2008','dd/MM/yyyy');

Locale specific patterns such as MMM and MMMM uses CLocale for retrieving needed information.

To format a timestamp to a date string, please use CDateFormatter.

公共方法

隐藏继承的方法

方法	描述	被定义在
parse()	Converts a date string to a timestamp.	CDateTimeParser

受保护的方法

隐藏继承的方法

方法	描述	被定义在
parseAmPm()		CDateTimeParser
parseInteger()		CDateTimeParser
parseMonth()		CDateTimeParser

方法详情

parse() 方法

public static integer parse(string $value, string $pattern='MM/dd/yyyy', array $defaults=array ( ))
$value	string	the date string to be parsed
$pattern	string	the pattern that the date string is following
$defaults	array	the default values for year, month, day, hour, minute and second. The default values will be used in case when the pattern doesn't specify the corresponding fields. For example, if the pattern is 'MM/dd/yyyy' and this parameter is array('minute'=>0, 'second'=>0), then the actual minute and second for the parsing result will take value 0, while the actual hour value will be the current hour obtained by date('H'). This parameter has been available since version 1.1.5.
{return}	integer	timestamp for the date string. False if parsing fails.

源码： framework/utils/CDateTimeParser.php#81 (显示)


public static function parse($value,$pattern='MM/dd/yyyy',$defaults=array())
{
    if(self::$_mbstringAvailable===null)
        self::$_mbstringAvailable=extension_loaded('mbstring');

    $tokens=self::tokenize($pattern);
    $i=0;
    $n=self::$_mbstringAvailable ? mb_strlen($value,Yii::app()->charset) : strlen($value);
    foreach($tokens as $token)
    {
        switch($token)
        {
            case 'yyyy':
            case 'y':
            {
                if(($year=self::parseInteger($value,$i,4,4))===false)
                    return false;
                $i+=4;
                break;
            }
            case 'yy':
            {
                if(($year=self::parseInteger($value,$i,1,2))===false)
                    return false;
                $i+=strlen($year);
                break;
            }
            case 'MMMM':
            {
                $monthName='';
                if(($month=self::parseMonth($value,$i,'wide',$monthName))===false)
                    return false;
                $i+=self::$_mbstringAvailable ? mb_strlen($monthName,Yii::app()->charset) : strlen($monthName);
                break;
            }
            case 'MMM':
            {
                $monthName='';
                if(($month=self::parseMonth($value,$i,'abbreviated',$monthName))===false)
                    return false;
                $i+=self::$_mbstringAvailable ? mb_strlen($monthName,Yii::app()->charset) : strlen($monthName);
                break;
            }
            case 'MM':
            {
                if(($month=self::parseInteger($value,$i,2,2))===false)
                    return false;
                $i+=2;
                break;
            }
            case 'M':
            {
                if(($month=self::parseInteger($value,$i,1,2))===false)
                    return false;
                $i+=strlen($month);
                break;
            }
            case 'dd':
            {
                if(($day=self::parseInteger($value,$i,2,2))===false)
                    return false;
                $i+=2;
                break;
            }
            case 'd':
            {
                if(($day=self::parseInteger($value,$i,1,2))===false)
                    return false;
                $i+=strlen($day);
                break;
            }
            case 'h':
            case 'H':
            {
                if(($hour=self::parseInteger($value,$i,1,2))===false)
                    return false;
                $i+=strlen($hour);
                break;
            }
            case 'hh':
            case 'HH':
            {
                if(($hour=self::parseInteger($value,$i,2,2))===false)
                    return false;
                $i+=2;
                break;
            }
            case 'm':
            {
                if(($minute=self::parseInteger($value,$i,1,2))===false)
                    return false;
                $i+=strlen($minute);
                break;
            }
            case 'mm':
            {
                if(($minute=self::parseInteger($value,$i,2,2))===false)
                    return false;
                $i+=2;
                break;
            }
            case 's':
            {
                if(($second=self::parseInteger($value,$i,1,2))===false)
                    return false;
                $i+=strlen($second);
                break;
            }
            case 'ss':
            {
                if(($second=self::parseInteger($value,$i,2,2))===false)
                    return false;
                $i+=2;
                break;
            }
            case 'a':
            {
                if(($ampm=self::parseAmPm($value,$i))===false)
                    return false;
                if(isset($hour))
                {
                    if($hour==12 && $ampm==='am')
                        $hour=0;
                    elseif($hour<12 && $ampm==='pm')
                        $hour+=12;
                }
                $i+=2;
                break;
            }
            default:
            {
                $tn=self::$_mbstringAvailable ? mb_strlen($token,Yii::app()->charset) : strlen($token);
                if($i>=$n || ($token{0}!='?' && (self::$_mbstringAvailable ? mb_substr($value,$i,$tn,Yii::app()->charset) : substr($value,$i,$tn))!==$token))
                    return false;
                $i+=$tn;
                break;
            }
        }
    }
    if($i<$n)
        return false;

    if(!isset($year))
        $year=isset($defaults['year']) ? $defaults['year'] : date('Y');
    if(!isset($month))
        $month=isset($defaults['month']) ? $defaults['month'] : date('n');
    if(!isset($day))
        $day=isset($defaults['day']) ? $defaults['day'] : date('j');

    if(strlen($year)===2)
    {
        if($year>=70)
            $year+=1900;
        else
            $year+=2000;
    }
    $year=(int)$year;
    $month=(int)$month;
    $day=(int)$day;

    if(
        !isset($hour) && !isset($minute) && !isset($second)
        && !isset($defaults['hour']) && !isset($defaults['minute']) && !isset($defaults['second'])
    )
        $hour=$minute=$second=0;
    else
    {
        if(!isset($hour))
            $hour=isset($defaults['hour']) ? $defaults['hour'] : date('H');
        if(!isset($minute))
            $minute=isset($defaults['minute']) ? $defaults['minute'] : date('i');
        if(!isset($second))
            $second=isset($defaults['second']) ? $defaults['second'] : date('s');
        $hour=(int)$hour;
        $minute=(int)$minute;
        $second=(int)$second;
    }

    if(CTimestamp::isValidDate($year,$month,$day) && CTimestamp::isValidTime($hour,$minute,$second))
        return CTimestamp::getTimestamp($hour,$minute,$second,$month,$day,$year);
    else
        return false;
}

Converts a date string to a timestamp.

parseAmPm() 方法

protected static string parseAmPm(string $value, integer $offset)
$value	string	the date string to be parsed
$offset	integer	starting offset
{return}	string	parsed day period value

源码： framework/utils/CDateTimeParser.php#312 (显示)


protected static function parseAmPm($value, $offset)
{
    $v=strtolower(self::$_mbstringAvailable ? mb_substr($value,$offset,2,Yii::app()->charset) : substr($value,$offset,2));
    return $v==='am' || $v==='pm' ? $v : false;
}

parseInteger() 方法

protected static string parseInteger(string $value, integer $offset, integer $minLength, integer $maxLength)
$value	string	the date string to be parsed
$offset	integer	starting offset
$minLength	integer	minimum length
$maxLength	integer	maximum length
{return}	string	parsed integer value

源码： framework/utils/CDateTimeParser.php#296 (显示)


protected static function parseInteger($value,$offset,$minLength,$maxLength)
{
    for($len=$maxLength;$len>=$minLength;--$len)
    {
        $v=self::$_mbstringAvailable ? mb_substr($value,$offset,$len,Yii::app()->charset) : substr($value,$offset,$len);
        if(ctype_digit($v) && (self::$_mbstringAvailable ? mb_strlen($v,Yii::app()->charset) : strlen($v))>=$minLength)
            return $v;
    }
    return false;
}

parseMonth() 方法（自版本 v1.1.13 可用）

protected static string parseMonth(string $value, integer $offset, string $width, string &$monthName)
$value	string	the date string to be parsed.
$offset	integer	starting offset.
$width	string	month name width. It can be 'wide', 'abbreviated' or 'narrow'.
$monthName	string	extracted month name. Passed by reference.
{return}	string	parsed month name.

源码： framework/utils/CDateTimeParser.php#326 (显示)


protected static function parseMonth($value,$offset,$width,&$monthName)
{
    $valueLength=self::$_mbstringAvailable ? mb_strlen($value,Yii::app()->charset) : strlen($value);
    for($len=1; $offset+$len<=$valueLength; $len++)
    {
        $monthName=self::$_mbstringAvailable ? mb_substr($value,$offset,$len,Yii::app()->charset) : substr($value,$offset,$len);
        if(!preg_match('/^[\p{L}\p{M}]+$/u',$monthName)) // unicode aware replacement for ctype_alpha($monthName)
        {
            $monthName=self::$_mbstringAvailable ? mb_substr($monthName,0,-1,Yii::app()->charset) : substr($monthName,0,-1);
            break;
        }
    }
    $monthName=self::$_mbstringAvailable ? mb_strtolower($monthName,Yii::app()->charset) : strtolower($monthName);

    $monthNames=Yii::app()->getLocale()->getMonthNames($width,false);
    foreach($monthNames as $k=>$v)
        $monthNames[$k]=rtrim(self::$_mbstringAvailable ? mb_strtolower($v,Yii::app()->charset) : strtolower($v),'.');

    $monthNamesStandAlone=Yii::app()->getLocale()->getMonthNames($width,true);
    foreach($monthNamesStandAlone as $k=>$v)
        $monthNamesStandAlone[$k]=rtrim(self::$_mbstringAvailable ? mb_strtolower($v,Yii::app()->charset) : strtolower($v),'.');

    if(($v=array_search($monthName,$monthNames))===false && ($v=array_search($monthName,$monthNamesStandAlone))===false)
        return false;
    return $v;
}