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PHP Scripts arrow Free PHP Tutorials arrow Free PHP Tutorials arrow PHP Tutorials and Examples arrow PHP 
Free PHP Tutorials arrow PHP Tutorials and Examples arrow PHP

Date Compare
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The following function compares two dates in the dd/mm/yyyy format.

It uses the PHP function gregoriantojd() as mktime() is unreliable for
dates < 1970. The mcal_date_compare also relies on the mcal libraries being installed.

One improvement could be a third parameter passed in with the actual date format to be used.

  1. <?php
  2. // returns <0, 0, >0 if  date a< date b,date a== date b,date a > date b respectively.
  3. function compareDate ($i_sFirstDate, $i_sSecondDate)
  4. {
  5.  //Break the Date strings into seperate components
  6.         $arrFirstDate = explode ("/", $i_sFirstDate);
  7.         $arrSecondDate = explode ("/", $i_sSecondDate);
  8.  
  9.         $intFirstDay    = $arrFirstDate[0];
  10.         $intFirstMonth  = $arrFirstDate[1];
  11.         $intFirstYear   = $arrFirstDate[2];
  12.  
  13.         $intSecondDay   = $arrSecondDate[0];
  14.         $intSecondMonth = $arrSecondDate[1];
  15.         $intSecondYear  = $arrSecondDate[2];
  16.  
  17.  
  18.     // Calculate the diference of the two dates and return the number of days.
  19.    
  20.                      
  21.         $intDate1Jul = gregoriantojd($intFirstMonth, $intFirstDay, $intFirstYear);
  22.         $intDate2Jul = gregoriantojd($intSecondMonth, $intSecondDay, $intSecondYear);
  23.            
  24.         return  $intDate1Jul - $intDate2Jul;
  25.        
  26. }//end Compare Date
  27. ?>

 
 

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