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DATE TIME CODE

DaysInSpan.php
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    2006-10-13

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    Simple function to return the number of days in a time span between 2 given dates.

    Arguments are long integers as returned by the standard php function mktime().
    Arguments can be generated using mktime(), dateEStime(), or
    dateAryEStime(mySQLdate2Ary()).

    Example:
    A simple illustrator to show how the function is used.

    Change comment characters on lines indicated to use text code.
    The test code can be used singly or multiply.

    By : dsilvia

    <?php
    /*
    * (c) 2006, D.E. Silvia, All rights reserved.
    * This code is available for use for non-commercial purposes.
    * Free to distribute as long as this copyright information remains intact.
    * No modification is authorized. Please, refer bugs/enhancements to
    * dsilvia@mchsi.com
    *
    */

    /*
    * Simple function to return the number of days in a time span between 2 given dates.
    *
    * Arguments are long integers as returned by the standard php function mktime().
    * Arguments can be generated using mktime(), dateEStime(), or
    * dateAryEStime(mySQLdate2Ary()).
    *
    * Example:
    * A simple illustrator to show how the function is used.
    *
    * Change comment characters on lines indicated to use text code.
    * The test code can be used singly or multiply.
    *
    * btw, ES|es stands for 'Epoch Seconds'
    *

    // Change line below from slash-slash to star-slash to use test code
    //
    $numDays00=daysInSpan(mktime(0,0,0,1,1,2000),mktime(0,0,0,4,1,2000));
    $numDays01=daysInSpan(mktime(0,0,0,1,1,2001),mktime(0,0,0,4,1,2001));

    print("Using mktime()<br />");
    print("The first quarter of 2000 has $numDays00 days (leap year)<br />");
    print("The first quarter of 2001 has $numDays01 days (not a leap year)<br /><br />");

    /*
    *
    // Change line below from slash-slash to star-slash to use test code
    //
    // using DateSpan.php
    include_once('DateSpan.php');
    $numDays00=daysInSpan(dateEStime(1,1,2000),dateEStime(1,4,2000));
    $numDays01=daysInSpan(dateEStime(1,1,2001),dateEStime(1,4,2001));

    print("Using dateEStime() from DateSpan.php<br />");
    print("The first quarter of 2000 has $numDays00 days (leap year)<br />");
    print("The first quarter of 2001 has $numDays01 days (not a leap year)<br /><br />");
    /*
    *
    */

    /*
    *
    // Change line below from slash-slash to star-slash to use test code
    //
    // using MySQLdateSpan.php
    include_once('MySQLdateSpan.php');
    $numDays00=daysInSpan(dateAryEStime(mySQLdate2Ary('2000-1-1')),dateAryEStime(mySQLdate2Ary('2000-4-1')));
    $numDays01=daysInSpan(dateAryEStime(mySQLdate2Ary('2001-1-1')),dateAryEStime(mySQLdate2Ary('2001-4-1')));

    print("Using mySQLdate2Ary() from MySQLdateSpan.php<br />");
    print("The first quarter of 2000 has $numDays00 days (leap year)<br />");
    print("The first quarter of 2001 has $numDays01 days (not a leap year)<br />");
    /*
    *
    */


    function daysInSpan($start,$end)
    {
    $dayTicks=ticksInDay();
    return ($end-$start)/$dayTicks;
    }

    function ticksInDay()
    {
    $today=getdate();
    $yesterday=mktime(0,0,0,$today[mon],$today[mday]-1,$today[year]);
    $today=mktime(0,0,0,$today[mon],$today[mday],$today[year]);
    return $today-$yesterday;
    }
    ?>
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