Array Modifications in PHP

First Question:

I have split a string into an array.

ie: bob_smells_like_poo

I want to change all of the underscores to spaces.

What functions are there that could locate an underscore?

Also: There is a function called array_key_exists that tells you if a key exists. Is there one for values?

I want to change all of the first letters of each word to a capital. What would be the best method?

 

explode() would explode your string into an array, where you specify your seperator.

As for values... you simply use a conditional (e.g. if ($somearray[9] != null) { dostuff(); } )... if the value is null, then it doesn't exist!

Capitalising - if you simply want to add a capital to the start of every word, use ucwords, if you want Title Case, have a look at this: http://www.sitepoint.com/blogs/2005/03/15/title-case-in-php/

 

How about the changing of _ to %20?

I didnt really understand what u meant by the conditional, but the title case helped a lot!

 

okay here is in essence what i am attempting to do.

The script explodes a string.

If any of the values are equal to an underscore, it replaces it with a %20 (space).

Yet it would be annoying to have to create a conditional for each element in the array... suggestions?

 

lol figured it out... in_array... haa! feel like such an idiot...

 

Just replacing a string within a string, you might want to use a egreg().