Question

我开始学习PHP OOP，我有一个练习来创建一个显示日期的函数。我想得出这个结果： $ date = new（“14-01-2014”）; //例如，来自用户的这个日期

echo $date -> displaDate ('YYYY-MM-JJ'); // Would result to 2014-01-14
echo $date -> day; //Would result to 14
echo $date -> dayOfWeek; //Would result to Thursday

有人可以向我解释如何开始为此制作功能吗？我知道函数有变量和方法。

Answer 1

<?php

 $dt = new DateTime();
 echo $dt->format('j-n-Y');
 ?>

Answer 2

从版本5.2开始，PHP具有DateTime类用于表示日期和时间。

例如

$dateTime=new DateTime('NOW');
echo "<pre>";
print_r($dateTime);
echo "</pre>";

http://www.php.net/manual/en/class.datetime.php

Answer 3

如果你自己实施它，你可以这样做：

class Date
{
   private $KeysArray;

   // Members
   public $day;
   public $dayOfWeek;

   public function __constructor()
   {
      // 1) This should get the current date and save it in the "keys array":
      // the constants should of course be replaced with the method you're using to get 
      // the year, month or whatever.
      $this->KeysArray = array("YYYY" => YEAR_VALUE, "MM" = MONTH_VALUE...)
      // 2) Set all of the properties (data members):
      $this->day = DAY_VALUE
      $this->dayOfWeek = DAY_OF_WEEK_VALUE
   }

   public function DisplayDate($DateFormatString)
   {
       // 1) Parse the $DateFormatString. Turn it into an array of the terms. If it's      
       // always going to be split with "-", then you could use the function 
       // "explode()".
       // 2) Go over that array and try calling each item with the $this->KeysArray.
   }
}

Answer 4

这很简单......

<!DOCTYPE html>
<html>
<body>

<?php
$t=time();
echo($t . "<br>");
echo(date('Y-m-d',$t));
?>

</body>
</html>

Answer 5

@Daniel Saad，谢谢你帮助我理解。以下是我的问题的解决方案：

class Date{

    private $dateString;    

    function __construct( $dateString )
    {
        $this->dateString = $dateString;    
    }


    // Method to display date in different formats.
    public function displayDate( $dateFormat )
    {
        list( $day, $month, $year ) = explode( '-', $this->dateString);

        switch($dateFormat)
        {

            case "YYYY-mm-dd" : $format = $year.'-'.$month.'-'.$day; break;
            case "mm-dd-YYYY" : $format = $month.'-'.$day.'-'.$year; break;
            default : $format = $year.'-'.$month.'-'.$day;
        }
        return $format;
    }

    //Method to get day 
    public function day()
    {
        $day = date('d', strtotime($this->dateString));
        return $day;
    }

    //Method to get the day of the week.
    public function dayofweek()
    {
        $weekday = date('l', strtotime($this->dateString));
        return $weekday;

    }
    //Method to get month in text.
    public function getmonth()
    {
        $month = date('F', strtotime($this->dateString));
        return $month;
    }
} 


?>

<强>的index.php

<?php 
//Initialisation
$date = new Date('14-01-2014');
$anotherdate = new Date('13-07-1979')

?>
    <h3>Instance 1</h3>
    <p>Date: <?php echo $date->displayDate('YYYY-mm-dd'); ?></p>
    <p>Day: <?php echo $date->day(); ?></p> 
    <p>Day of week: <?php echo $date->dayofweek(); ?></p>  
    <p>Month: <?php echo $date->getmonth(); ?></p> <br />

<强>结果：实例1 日期：2014-01-14 第14天星期几：星期二月：1月

我希望这也可以帮助那些刚刚开始理解OOP的人。

以php，OOP方式创建显示日期功能

5 个答案: