Tag Archives: calendar

Google Calendar

So, I’ve been working on creating a php script that pulls Google Calendar data. I couldn’t find many examples of how to do it on the web. So, after much trial and error here is what I’ve come up with. Use as you wish.

<?php
/**********************************************************/
/* The username/password used to login to Google Calendar */
/*                                                        */
/* This is the only part you should have to edit in this  */
/* script.                                                */
/**********************************************************/
$google_username = '???';
$google_password = '???';

/**************************************************************************/
/* Include Zend framework and load libraries, used to interact with Gdata */
/* Get the Zend framework at http://framework.zend.com/download           */
/**************************************************************************/
require_once 'Zend/Loader.php';
Zend_Loader::loadClass('Zend_Gdata');
Zend_Loader::loadClass('Zend_Gdata_AuthSub');
Zend_Loader::loadClass('Zend_Gdata_ClientLogin');
Zend_Loader::loadClass('Zend_Gdata_Calendar');

/******************/
/* Login to Gdata */
/******************/
$authService = Zend_Gdata_Calendar::AUTH_SERVICE_NAME;
$httpClient = Zend_Gdata_ClientLogin::getHttpClient($google_username, $google_password, $authService);

/***********************************************************************/
/* Replaces [link:url]Text[/link] with a properly formatted anchor tag */
/* The url must have the http:// or https:// at the front              */
/*                                                                     */
/* Params:                                                             */
/*  $text - String of text                                             */
/***********************************************************************/
function createLink($text) {
    $pattern1 = '/\[\/link\]/';
    $pattern2 = '/(\[link:)([^\]]*)(\])/';

    $replacement1 = '</a>';
    $replacement2 = '<a href="$2" target="_blank" rel="noopener">';

    $text = preg_replace($pattern1 , $replacement1, $text);
    $text = preg_replace($pattern2 , $replacement2, $text);

    return $text;
}

/*****************************************************************************************/
/* Replaces [email:email address]Text[/email] with a properly formatted email anchor tag */
/*                                                                                       */
/* Params:                                                                               */
/*  $text - String of text                                                               */
/*****************************************************************************************/
function createEmail($text) {
    $pattern1 = '/\[\/email\]/';
    $pattern2 = '/(\[email:)([^\]]*)(\])/';

    $replacement1 = '</a>';
    $replacement2 = '<a href="mailto:$2">';

    $text = preg_replace($pattern1 , $replacement1, $text);
    $text = preg_replace($pattern2 , $replacement2, $text);

    return $text;
}

/*****************************************************/
/* Replaces line breaks in the text with <br /> tags */
/*                                                   */
/* Params:                                           */
/*  $text - String of text                           */
/*****************************************************/
function createLineBreaks($text) {
    $text = str_replace("\n", "<br />", $text);

    return $text;
}

/*****************************************************************/
/* This function applies the formatting functions defined above. */
/*                                                               */
/* Params:                                                       */
/*  $text - String of text                                       */
/*****************************************************************/
function formatText($text) {
    $text = createLink($text);
    $text = createEmail($text);
    $text = createLineBreaks($text);

    return $text;
}

/*****************************************************************/
/* This function formats the date/time shown to the user.        */
/*                                                               */
/* Params:                                                       */
/*  $start - Starting date/time                                  */
/*  $end - Ending date/time                                      */
/*****************************************************************/
function formatDate($start, $end) {
    if (date("H:i:s", $start) == "00:00:00" && date("H:i:s", $end) == "00:00:00") //All day event
    {
        $end = $end - 1; //For all day events the end day is one greater than it really is

        if(date("M j, Y", $start) == date("M j, Y", $end)) //Single day all day event
        {
            $date = date("M j, Y", $start);
        }
        else //All day event spanning multiple days
        {
            if (date("Y", $start) == date("Y", $end))
            {
                if (date("M", $start) == date("M", $end)) //All day event spanning multiple days in same month
                {
                    $date = date("M j", $start) . " - " . date("j, Y", $end);
                }
                else //All day event spanning multiple months
                {
                    $date = date("M j", $start) . " - " . date("M j, Y", $end);
                }
            }
            else // All day event spanning multiple years
            {
                $date = date("M j, Y", $start) . " - " . date("M j, Y", $end);
            }
        }
    }
    else //Time range event
    {
        if(date("M j, Y", $start) == date("M j, Y", $end)) //Single day range event
        {
            $date = date("M j, Y (g:i a", $start) . " - " . date("g:i a)", $end);
        }
        else //Range event spanning multiple days
        {
            if (date("Y", $start) == date("Y", $end))
            {
                if (date("M", $start) == date("M", $end)) //Range event spanning multiple days in same month
                {
                    $date = date("M j (g:i a)", $start) . " - " . date("M j (g:i a), Y", $end);
                }
                else //Range  event spanning multiple months
                {
                    $date = date("M j (g:i a)", $start) . " - " . date("M j (g:i a), Y", $end);
                }
            }
            else //Range event spanning multiple years
            {
                $date = date("M j, Y (g:i a)", $start) . " - " . date("M j, Y (g:i a)", $end);
            }
        }
    }

    return $date;
}

/******************************************************************/
/* Create a definition list of the events in human-readable form. */
/* You can use CSS to style the list.                             */
/*                                                                */
/* Params:                                                        */
/* $client - GData $httpClient created above                      */
/*  $feed - The GData feed to read                                */
/******************************************************************/
function listEvents($client, $feed)
{
    $gdataCal = new Zend_Gdata_Calendar($client);
    $eventFeed = $gdataCal->getCalendarEventFeed($feed);

    $html = $html . "<dl>\n";

    foreach ($eventFeed as $event)
    {
        foreach ($event->when as $when)
        {
            $start = strtotime($when->startTime);
            $end = strtotime($when->endTime);
        }
        $date = formatDate($start, $end);

        foreach ($event->where as $where)
        {
            $location = $where->valueString;
        }

        $title = $event->title->text;
        if ($location != "")
        {
            $title = "<a href=\"" . $location . "\" target=\"_blank\">" . $title . "</a>";
        }
        $content = formatText($event->content->text);

        $html = $html . " <dt><span class=\"eventdate\">" . $date . "</span><span class=\"eventtitle\"> - " . $title . "</span></dd>\n";
        $html = $html . " <dd><span class=\"eventcontent\">" . $content . quot;</span></dd>\n";
    }

    $html = $html . "</dl>\n";

    return $html;
}
?>
<html>
    <body>
<?php
Echo listEvents($httpClient, "http://www.google.com/calendar/feeds/yourfeedhere");
?>
    </body>
</html>