Multi-Dimensional Sort

[Necuima 15]

Hi Larry,

 

The book describes how to use usort, etc., to sort a multi-dimensional array and that works great.

 

Is it possible to use something similar to sort a 2 dimensional array by its primary key whilst at the same time inserting some value into an existing field in each secondary array entry?  I want to insert a sequence number into the field in the secondary array as the primary key is not sequential for the purposes I have in mind.

 

Thanks in anticipation for your advice.

 

Cheers

Edited May 3, 2017 by Necuima

[Necuima 15]

Hi Larry,

 

After reading the advice in pages 4... more carefully, I found that a straight usort with the keys based on values within the secondary array gave me exactly what I was looking for.

 

Cheers

[Larry 422]

Awesome. Kudos for figuring it out and thanks for letting us know!