code snippets

Just a quick example for Drupal template registration:

Declared in the .module

This code for template tracers should be used with caution. They do expose where files live (less secure).
Opening tracer:

Closing tracer:

I had a module where I was previously loading and processing an xml file in one step using

simple_xml_load_file (URL of xml file)

If you need to get the URL for an image file with a drupal style applied, this function is what you need to get the path for the image styles:

image_style_url($style_name, $path)

Parameters

$style_name: The name of the style to be used with this image.

$path: The path to the image. Path will look like "public://mypicture.jpg"

Return value

The absolute URL where a style image can be downloaded, suitable for use in an <img> tag. Requesting the URL will cause the image to be created.

A foreach thows non-fatal warnings if you pass it a non-existent array or a string or integer. It does not mind, if you toss it an empty array. So I use the following ternary logic within the declaration of the foreach. If $aResults is an array OR an object, then it uses that in the foreach ELSE pass it an empty array. This makes it fail without throwing any errors.

Here is a quick php bit of code to sort an array of objects.

A quick non-library way to safely look for a GET value and do something with it.

Sometimes you want to see if a file or directory in the managed file system exists and base your logic off its existence.
Example: wanting to know if the directory /sites/web-dev.swirt.us/files/jqueryui_theme/redmond/ exists before including it
Use is_dir() http://php.net/manual/en/function.is-dir.php
The trick is to add the public:// stream wrapper

This is a handy function to use to be able to pass it a variety of values and have the function return either of three flavors of boolean values.