PHP simple calendar

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DATE: Oct. 23, 2013, 5:55 p.m.

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  1. <?php
  2. /*
  3. Yves Glodt (yg@mind.lu) 13.01.2002
  4. This is based on a calendar I found in the phpbuilder code library (http://phpbuilder.com/snippet/detail.php?type=snippet&id=22)
  5. It still looks kinda similar, but behind the scenes, much has changed.
  6. Some description is available at http://www.mind.lu/~yg/stuff/
  8. 19.02.2002 - Code cleanup and fixed error in getting the number of days in a month.
  10. Ver 2.0 Changes
  11. - Added Remarks for the Newbies like me.
  12. - Made changes to the format and color.
  13. - Added a Next and Previous button.
  14. - Corrected the FORM so it works. I had issues with it not submiting.
  16. Next I will be adding a database function to it.
  19. Changes:
  20. ---------
  21. - The html actually validates.
  22. - Changed form-method from "post" to "get", to simplify integration.
  23. - All dates are handled correctly, the result looks always good and creates valid html.
  24. - When the current month/year is shown, the current day is highlighted.
  25. - The years-<select> is dynamic, it shows the selected year +/- 5 years.
  26. - A light version, for embedding into existing pages is available. (http://www.mind.lu/~yg/stuff/)
  28. Note:
  29. The valid range of a timestamp is typically from
  30. Fri, 13 Dec 1901 20:45:54 GMT to
  31. Tue, 19 Jan 2038 03:14:07 GMT.
  32. (These are the dates that correspond to the minimum and maximum values for a 32-bit signed integer.)
  33. */
  35. $CurDate = getdate(); //gets the server current date.
  36. if (checkdate($HTTP_GET_VARS['month'],1,$HTTP_GET_VARS['year']) == NULL)
  37. {
  38. $YearToShow = $CurDate['year']; // $YearToShow = $CurDate['year'];
  39. $MonthToShow = $CurDate['mon']; // $MonthToShow = $CurDate['mon'];
  40. }
  41. else
  42. {
  43. if (checkdate($HTTP_GET_VARS['month'],1,$HTTP_GET_VARS['year']) == false)
  44. {
  45. $YearToShow = $CurDate['year'];
  46. $MonthToShow = $CurDate['mon'];
  47. }
  48. else
  49. {
  50. $YearToShow = $HTTP_GET_VARS['year'];
  51. $MonthToShow = $HTTP_GET_VARS['month'];
  52. if ( ($YearToShow < 1902) || ($YearToShow > 2037) )
  53. {
  54. $YearToShow = $CurDate['year'];
  55. $MonthToShow = $CurDate['mon'];
  56. }
  57. }
  58. }
  59. // This checks to see if the current day will be displayed. If it is make the background a color.
  60. if ( ($YearToShow == $CurDate['year']) && ($MonthToShow == $CurDate['mon']) ) { $DayToShow = $CurDate['mday']; }
  61. // This checks to see how many days are in the month in question.
  62. $NumberOfDays = date(t,mktime(0,0,0,$MonthToShow+1,0,$YearToShow,-1));
  63. // This section converts the month number to the month name.
  64. $MonthNames = array(1=>'January','February','March','April','May','June','July','August','September','October','November','December');
  65. //$Years = array('1998','1999','2000','2001','2002','2003','2004','2005');
  66. $Years = array($YearToShow-5,$YearToShow-4,$YearToShow-3,$YearToShow-2,$YearToShow-1,$YearToShow,$YearToShow+1,$YearToShow+2,$YearToShow+3,$YearToShow+4,$YearToShow+5);
  67. // Sets up the href
  68. if ($MonthToShow == 12)
  69. {
  70. $pmon = ($MonthToShow - 1);
  71. $pyear = ($YearToShow);
  72. $nmon = (1);
  73. $nyear = ($YearToShow + 1);
  74. }
  75. else
  76. {
  77. if ($MonthToShow == 1)
  78. {
  79. $pmon = (12);
  80. $pyear = ($YearToShow - 1);
  81. $nmon = ($MonthToShow + 1);
  82. $nyear = ($YearToShow);
  83. }
  84. else
  85. {
  86. $pmon = ($MonthToShow - 1);
  87. $pyear = ($YearToShow);
  88. $nmon = ($MonthToShow + 1);
  89. $nyear = ($YearToShow);
  90. }
  91. }
  93. echo <<<EOT
  94. <table border="1" cellpadding="0" cellspacing="0" bordercolor=black>
  95. <tr><td colspan="7" align="center">
  96. <table width="100%" border="0" cellspacing="0" cellpadding="2">
  97. <tr>
  98. <td width="20%"><font color="#000000" size="4" face="Times New Roman, Times, serif">$MonthNames[$MonthToShow] $YearToShow</font></td>
  99. <td width="30%" align="right">
  101. <a href=$PHP_SELF?month=$pmon&year=$pyear><< previous</a>
  102. &nbsp;&nbsp;&nbsp;&nbsp;
  103. <a href=$PHP_SELF?month=$nmon&year=$nyear>next >></a>
  105. </td>
  106. <td align="right" width="50%"><form action="$PHP_SELF" method="get">
  107. <font size="2" face="Times New Roman, Times, serif">Month</font><select name="month">
  108. EOT;
  109. while (list($key,$value) = each($MonthNames))
  110. {
  111. if ($key != $MonthToShow) { print '<option value="'.$key.'">'.$value."</option>\n"; }
  112. else { print '<option value="'.$key.'" selected>'.$value."</option>\n"; }
  113. }
  114. print "</select>\nYear<select name=\"year\">\n";
  115. while (list($key,$value) = each($Years))
  116. {
  117. if ($value != $YearToShow) { print '<option value="'.$value.'">'.$value."</option>\n"; }
  118. else { print '<option value="'.$value.'" selected>'.$value."</option>\n"; }
  119. }
  120. echo <<<EOT
  121. </select>
  122. <input type="submit" value="Go"></td>
  123. </tr>
  124. </table>
  128. </td></tr>
  129. <tr>
  130. <td width="100" align="center" bgcolor="#CC0000"><font color="#FFFFFF"><strong>Sunday</strong></font></td>
  131. <td width="100" align="center" bgcolor="#CC0000"><font color="#FFFFFF"><strong>Monday</strong></font></td>
  132. <td width="100" align="center" bgcolor="#CC0000"><font color="#FFFFFF"><strong>Tuesday</strong></font></td>
  133. <td width="100" align="center" bgcolor="#CC0000"><font color="#FFFFFF"><strong>Wednesday</strong></font></td>
  134. <td width="100" align="center" bgcolor="#CC0000"><font color="#FFFFFF"><strong>Thursday</strong></font></td>
  135. <td width="100" align="center" bgcolor="#CC0000"><font color="#FFFFFF"><strong>Friday</strong></font></td>
  136. <td width="100" align="center" bgcolor="#CC0000"><font color="#FFFFFF"><strong>Saturday</strong></font></td>
  137. </tr>
  138. EOT;
  139. $FirstDayOfWeek = date(l,mktime(0,0,0,$MonthToShow,1,$YearToShow));
  140. // This section ofsets the first day of the month so it matches the day of week.
  141. switch ($FirstDayOfWeek) {
  142. case 'Monday':
  143. $offset = 1;
  144. break;
  145. case 'Tuesday':
  146. $offset = 2;
  147. break;
  148. case 'Wednesday':
  149. $offset = 3;
  150. break;
  151. case 'Thursday':
  152. $offset = 4;
  153. break;
  154. case 'Friday':
  155. $offset = 5;
  156. break;
  157. case 'Saturday':
  158. $offset = 6;
  159. break;
  160. default:
  161. $offset = 0;
  162. }
  163. // this covers the first few empty days.
  164. if ($offset > 0) {
  165. print "<tr height=100 valign=top>";
  166. echo str_repeat("<td bgcolor=000000>&nbsp;</td>",$offset);
  167. }
  168. // This section is to Allow the first day of the week to be sunday and also.
  169. // to make sure that the table prints out right.
  170. for ($i=1; $i <= $NumberOfDays; $i++) {
  171. $DayOfWeek = date(l,mktime(0,0,0,$MonthToShow,$i,$YearToShow));
  172. if($DayOfWeek == 'Sunday') {
  173. print "<tr height=100 valign=top>";
  174. }
  175. if ($i != $DayToShow) {
  176. print "<td>$i</td>";
  177. } else {
  178. print "<td bgcolor=yellow>$i</td>";
  179. }
  180. if($DayOfWeek == 'Saturday') {
  181. print "</tr>\n";
  182. }
  183. }
  184. // This section will fill in the blank spaces.
  185. // The first part covers Feb.
  186. if ( ( ($offset == 5) && ($NumberOfDays > 30) ) || ( ($offset == 6) && ($NumberOfDays > 29) ) ) {
  187. if (42-$NumberOfDays-$offset > 0) {
  188. echo str_repeat("<td bgcolor=000000 class=\"n\">&nbsp;</td>\n",42-$NumberOfDays-$offset);
  189. }
  190. print "</tr>\n";
  191. } elseif ( ($NumberOfDays != 28) || ($offset > 0) ) {
  192. if (35-$NumberOfDays-$offset > 0) {
  193. echo str_repeat("<td bgcolor=000000 class=\"n\">&nbsp;</td>\n",35-$NumberOfDays-$offset);
  194. print "</tr>\n";
  195. }
  196. }
  197. echo <<<EOT
  198. </table>
  199. EOT;
  200. ?>
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