I’ve recently needed to get longitude and latitude coordinates for several locations. I first went about it by getting the values from http://www.geonames.org/. This was difficult because it requires you convert degrees, minutes and seconds to the wgs84 format. This is no treat.

After some googling I discovered that it’s pretty simple to make a Google map with a pin on it which tells you the coordinates of the pin in the wgs84 format.

Here’s the code:

HTML

<p id="coords"></p>
<div id="map_canvas" style="height: 600px"></div>

Javascript

 
function gogmap() {
 
	var map,
		marker, 
		point = new GLatLng(52.482780222078205, -102.65625); // default position
 
	var posChange = function() {
		point = marker.getLatLng();
		document.getElementById('coords').innerHTML = "lat: " + point.lat() + "<br>lng: " + point.lng();
	};
 
	map = new GMap2(document.getElementById("map_canvas"));
	map.addControl(new GLargeMapControl());
	map.addControl(new GNavLabelControl());
	map.setCenter(point, 4);
 
	marker = new GMarker(point, {draggable: true});
 
	GEvent.addListener(marker, "dragend", posChange);
 
	map.addOverlay(marker);		
 
	posChange();
}
 
gogmap();

Live Example

When you drag the pin to a new location the longitude and latitude below will update.  Read more... (153 words, 1 image, estimated 37 secs reading time)

Forms are something a web developer makes and maintains nearly every day. Despite their common occurrence they’re easy to do badly. Luckily they are something of a solved problem. There are many tools out there that help the PHP developer create forms including PEAR’s HTML_QuickForm2, Zend Framework’s Zend_Form, eZ Components’s ezcInputForm, CodeIgniter’s Form Helper, and many others. Having drunk the Symfony Kool-Aid and being pretty impressed with it I thought I would see if I could use their sfForm class in a non Symfony project.  Read more... (270 words, 1 image, estimated 1:05 mins reading time)

In pursuit of creating excellent performing web pages, and inspired by YUI’s combo system, I decided to see what would be required to combine CSS or JavaScript files with PHP. My goal in doing so is to reduce the number of HTTP requests to our servers which should result in a speed up in page load times and a decrease in the load on our servers.

With performance in mind I set the following criteria for my solution:  Read more... (441 words, 1 image, estimated 1:46 mins reading time)

• It should cache combined files to increase performance.
• When a CSS or JavaScript file is modified the cache should be expired.

I’ve recently updated to YUI 2.8.0r4 for a project that was using YUI 2.7. Unfortunately after pointing my script tag to use the newer version of YUI the uploader widget stopped working with the existing code.

As it turns out uploader.swf found in the build directory is broken but uploader.swf found in the examples directory works.

For testing purposes I updated my script to use uploader.swf hosted by YAHOO with the following javascript:

YAHOO.widget.Uploader.SWFURL = "http://developer.yahoo.com/yui/examples/uploader/assets/uploader.swf";

This didn’t work either and since I was no longer hosting uploader.swf on the same domain. The reason for this is best explained by the YUI team:  Read more... (284 words, 1 image, estimated 1:08 mins reading time)

I’ve been a big fan of the YAHOO! User Interface Javascript library for some time now. It provides so many richly featured widgets and it has really forced me to learn how to write better Javascript code. That’s why I was excited by the latest release of the version 2 branch of YUI : 2.8. One new feature in YUI 2.8 that I nearly missed is form serialization. It’s a feature that I’ve been wanting for a long time and it’s a reason I’ll turn to  jQuery for its serialize function.  Read more... (211 words, 1 image, estimated 51 secs reading time)

If you’re developing a Symfony 1.2.8 (and possibly other older releases) application with PHP 5.3.0 you won’t be able to use the sfValidatorFile with mime_categories set to web_images without changing Symfony code. Was that really English? Since PHP 5.3.0 finfo will return charset information with the mime type. See more about this change in this php bug report.

If you try to use web_images, the validator will fail on images it should accept with an error like: “Invalid mime type (image/gif; charset=binary).”

As a work around until this is fixed, you can change your file validator to something like this:  Read more... (132 words, 1 image, estimated 32 secs reading time)

Back to Part 2

——-

The HTTPS session is the “authority” session, and due to authenticity tests will not accept the HTTP session data as being “valid” as it doesn’t contain the correct information that an HTTPS session data file contains. So while it may still be possible for a user to hi-jack the HTTP session, it’s not possible for them to gain access to another users account or personal information by tampering with the HTTP headers and sending someone’s session id, because once they hit a page or perform an operation which pushes them to the HTTPS website, they immediately become logged out, and any personal information is cleared from the session data. For a user to hi-jack another visitors HTTPS session they’d need to have the ability “sniff” the secure session id, which is sent over the network in an encrypted fashion and is very unlikely – which is just as safe as always using HTTPS.  Read more... (332 words, 1 image, estimated 1:20 mins reading time)

If you’re like me and you develop applications for the Linux platform from a remote computer, then you may find the following tutorial interesting.

For a long time jEdit was the perfect editor for me. It has syntax highlighting for just about every language and it has an excellent (S)FTP file browser. What more could you need as a PHP developer? Apparently a lot. With the maturation of PHP development came IDEs which provide code completion, inline documentation, a class browser, SCM integration, fonts that are prettier than jEdit’s and so much more. The PHP IDE that has stood out the most to me is Netbeans.  Read more... (676 words, 1 image, estimated 2:42 mins reading time)