Extracting / Manipulating data from one array to generate another

[eluser]JamesTaylor[/eluser]
Thanks for your help mddd,

I've examined this and looked through the logic to try and learn something! However when i implement it it is only giving me the two start dates in the array.

i.e the array is as follows:

Code:

Array (
[15] => booked
[25] => booked
)