Calendars made using PHP

This article mainly introduces the use of PHP calendar, the following have effect map, we refer to the use of the bar

  calendar.class.php   Code is as follows:  <?php class Calendar {  private $year;//Current year   private $month;//Current Month   Private $start _weekday; The first day of the month corresponds to the week   private $days; How many days are there in the current month     function __construct () {    $this->year=isset ($_get["year")? $_get["Year"]: Date ("Y");     $this->month=isset ($_get["month"])? $_get["Month"]: Date ("M");       $this->start_weekday=date ("W", Mktime (0, 0, 0, $this->month, 1, $this->year));     $this->days=date ("T", mktime (0, 0, 0, $this->month, 1, $this->year));  }     function out () {   echo ' <table align= ' center ' > ';     $this->chagedate ("test.php");     $this->weekslist ();     $this->dayslist ();    echo ' </table> ';  }     Private function weekslist () {    $week =array (' Day ', ' one ', ' two ', ' three ', ' four ', ' five ', ' six ');      echo ' <tr> ';   &NBSPFor ($i =0 $i <count ($week), $i + +)     echo ' <th class= ' fontb ' > '. $week [$i]. ' </th> ';      echo ' </tr> ';  }     Private function dayslist () {   echo ' <tr> ';    //output space (to be vacated before the first day of January) &NB Sp  for ($j =0 $j < $this->start_weekday; $j + +)     echo ' <td> </td> ';        for ($k =1 $k <= $this->days; $k + +) {    $j + +     if ($k ==date (' d ')) &NB Sp    echo ' <td class= ' fontb ' > '. $k. ' </td> ';     Else      echo ' <td> '. $k. ' </td> ';       if ($j%7==0)      echo ' </tr><tr> ';     &NBSP}      //after several spaces    while ($j%7!==0) {    echo ' <td> </td&gt ;';     $J + +;   &nbsp      echo ' </tr> ';  }     Private function prevyear ($year, $month) {    $year= $year-1;      if ($year < 1970)     $year = 1970;      return "year={$year}&month={$month}";   }       Private Function Prevmo Nth ($year, $month) {   if ($month = = 1) {    $year = $year-1;       if ($year < 1970 )       $year = 1970;       $month = 12;    }else{    $month--   }      return "year={$year}&month={$month}";    }       Private Function nextyear ($year, $month) {    $year = $year + 1;   &nbs P  if ($year > 2038)     $year = 2038;      return "year={$year}&month={$month}";   }       Private Function Nextmo Nth ($year, $month) {   if ($month ==12) {    $year + +       ($year > 2100)   &N Bsp   $year = 2100;       $month = 1;    } else{    $month + +              return "year={$year}&month={$month}"; nbsp  }     Private function chagedate ($url = "") {   echo ' <tr> ';    echo ' <td>& Lt;a href= "? '". $this->prevyear ($this->year, $this->month). " > '. ' << '. ' </a></td> ';    echo ' <td><a href= '? $this->prevmonth ($this->year, $this->month). " > '. ' < '. ' </a></td> ';    echo ' <td colspan= ' 3 ' > ';    echo ' <form> ';    echo ' <select name= ' year ' onchange= ' window.location= '. $url. Year= ' +this.options[selectedindex].value+ ' &month= '. $this->month. ' " > ';    for ($sy =1970 $sy <= 2100 $sy + +) {    $selected = ($sy = = $this->year)? "Selected": "";     echo ' <option '. $selected. ' value= '. $sy. ' " > '. $sy. ' </option> ';   &nbsp    echo ' </select> ';    echo ' <select name= ' month '  onchange= ' window.location= '. $url. ' Year= '. $this->year. ' &month= ' +this.options[selectedindex].value ' > ';    for ($sm =1 $sm <=12; $sm + +) {    $selected 1 = ($sm = = $this->month)? "Selected": "";     echo ' <option '. $selected 1. ' value= '. $sm. ' > ' $sm. ' </option> ';   &nbsp    echo ' </select> ';    echo ' </form> ';     echo ' </td> ';        echo ' <td><a href= '? $this->nextyear ($this->year, $this->month). " > '. ' >> '. ' </a></td> ';    echo ' <td><a href= '? $this->nextmonth ($this->year, $this->month). " > '. ' > '. ' </a></td> ';    echo ' </tr> ';  }   &NBSP}?>        test.php      code as follows:  <style>  table {  border:1px solid #050; &nbsp}    .FONTB {  Color:white;   Background:blue; &NBSP}      th {  width:30px;  }    td,th {  height:30px;   Text-align:cen ter   &NBSP}  form {  margin:0px   padding:0px  } </style> <?php  include "Calendar . class.php ";     $calendar =new calendar;     $calendar->out ()?>