Comparing two dates in PHP เปรียบเทียบวันที่ใน PHP

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1. ระบุวันที่ในรูปแบบ (format) เดียวกัน
   
   PHP

   <?php // PHP program to compare dates // Declare two dates and // initialize it $date1 = "1998-11-24"; $date2 = "1997-03-26"; // Use comparison operator to // compare dates if ($date1 > $date2) echo "$date1 is latest than $date2"; else echo "$date1 is older than $date2"; ?>

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   <?php // PHP program to compare dates   // Declare two dates and // initialize it $date1 = "1998-11-24"; $date2 = "1997-03-26";   // Use comparison operator to // compare dates if ($date1 > $date2) echo "$date1 is latest than $date2"; else echo "$date1 is older than $date2";   ?>

2. หากรูปแบบ (format) ต่างกัน ให้ใช้ฟังก์ชัน strtotime()
   
   PHP

   <?php // PHP program to compare dates // Declare two dates in different // format $date1 = "12-03-26"; $date2 = "2011-10-24"; // Use strtotime() function to convert // date into dateTimestamp $dateTimestamp1 = strtotime($date1); $dateTimestamp2 = strtotime($date2); // Compare the timestamp date if ($dateTimestamp1 > $dateTimestamp2) echo "$date1 is latest than $date2"; else echo "$date1 is older than $date2"; ?>

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   <?php // PHP program to compare dates    // Declare two dates in different // format $date1 = "12-03-26"; $date2 = "2011-10-24";    // Use strtotime() function to convert // date into dateTimestamp $dateTimestamp1 = strtotime($date1); $dateTimestamp2 = strtotime($date2);    // Compare the timestamp date if ($dateTimestamp1 > $dateTimestamp2)     echo "$date1 is latest than $date2"; else     echo "$date1 is older than $date2";    ?>

3. ใช้ DateTime class
   
   PHP

   <?php // PHP program to compare dates // Declare two dates in different // format and use DateTime() function // to convert date into DateTime $date1 = new DateTime("12-11-24"); $date2 = new DateTime("2011-03-26"); // Compare the dates if ($date1 > $date2) echo $date1->format("Y-m-d") . " is latest than " . $date2->format("Y-m-d"); else echo $date1->format("Y-m-d") . " is older than " . $date2->format("Y-m-d"); ?>

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   <?php // PHP program to compare dates    // Declare two dates in different // format and use DateTime() function // to convert date into DateTime $date1 = new DateTime("12-11-24"); $date2 = new DateTime("2011-03-26");    // Compare the dates if ($date1 > $date2)     echo $date1->format("Y-m-d") . " is latest than "             . $date2->format("Y-m-d"); else     echo $date1->format("Y-m-d") . " is older than "             . $date2->format("Y-m-d");    ?>

   
    

ที่มา : https://www.geeksforgeeks.org/comparing-two-dates-in-php/

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ป้ายกำกับ:Compare, dates, php