Preg Replace

[RobertP]

i am in need of a regular expression that will parse my associative array keys into clean strings.

 

example:

testKeyString33 = Test Key String 33
dbHost = Db Host
simpleStringWithMore = Simple String With More

 

This is how i think it would work...

- append a space to all UPPER CASE letters (aSd = a Sd)

- append a space to the start of all integers... (asd123 = asd 123)

 

if this is confusing at all, please say so :S

[.josh]

$string = "abc123AbcDef";
$string = preg_replace('~(?<!^)([A-Z]|[0-9]+)~',' $1',$string);

 

output:

 

abc 123 Abc Def

[RobertP]

what does this mean? positive look-ahead?

 

(?<!^)

[.josh]

no, it's a negative look-behind.  It checks to see if the character it is looking for isn't at the start of the string, by looking at the character that comes before it (the ^ signifies start of string, which isn't an actual character, but you get the idea).  Otherwise, you will end up with for instance "Abc" to " Abc"