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  4. iCalendar / vCard parser for PHP

iCalendar / vCard parser for PHP

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Evert Pot user avatar
Evert Pot
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Sep. 08, 11 · News
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I've just finished an iCalendar vCard parser for PHP. It's done almost completely with a 'natural' simplexml-like interface, so it should (hopefully) be just as easy to parse, and also modify iCalendar / vCard objects (ics/vcf files).

To install using pear, run the following:

    pear channel-discover pear.sabredav.org
    pear install sabredav/Sabre_VObject-alpha

Or download from pear.sabredav.org.

For testing, I used this iCalendar file: icalendartest.ics.

To load in an object, you use the Reader class:

    // Link to the correct path if you manually dowloaded the package
    include 'Sabre/VObject/includes.php';
     
    // Reading an object
    $calendar = Sabre_VObject_Reader::read(file_get_contents('icalendartest.ics'));

iCalendar objects consist of components (VEVENT, VTODO, VTIMEZONE, etc), properties (SUMMARY, DESCRIPTION, DTSTART, etc) and parameters, which are to properties what attributes are to elements in XML. To show a listing of all events in a calendar, this snippet would work:

    echo "There are ", count($calendar->vevent), " events in this calendar\n";
     
    // Looping through events
    foreach($calendar->vevent as $event) {
     
    echo (string)$event->dtstart, ": ", $event->summary, "\n";
     
    }

You can easily modify properties:

    $calendar->vevent[0]->description = "It's a birthday party";

Creating new objects uses the following syntax:

    $todo = new Sabre_VObject_Component('vtodo');
    $todo->summary = 'Take out the dog';
    $calendar->add($todo);

And to turn your newly modified calendar back into an ics file:

    file_put_contents('output.ics', $calendar->serialize());

Lastly, parameters are accessible through array-syntax:

    echo (string)$calendar->vevent[0]->dtstart['tzid'], "\n";

I had fun building this, I hope it's useful to you as well. It's 100% unittested, but bugs might still appear due to the complex nature of API. Use at your own risk :). This library will be part of the SabreDAV project, which is also where you can go for the source, report bugs or make suggestions.

PHP Parser (programming language)

Published at DZone with permission of Evert Pot, DZone MVB. See the original article here.

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  • Building Call Graphs for Code Exploration Using Tree-Sitter
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