php explode at capital letters?

Question

I have strings like:

$a = \'helloMister\';
$b = \'doggyWaltz\';
$c = \'bumWipe\';
$d = \'pinkNips\';

How can I explode at the capital lette

Answer 1

Look up preg_split

$result = preg_replace("([A-Z])", " $0", "helloMister");
print_r(explode(' ', $result));

hacky hack. Just don't have spaces in your input string.

Answer 2

Extending Mathew's Answer, this works perfectly,

$arr = preg_replace("([A-Z])", " $0", $str);
$arr = explode(" ",trim($arr));

Answer 3

If you want to split helloMister into hello and Mister you can use preg_split to split the string at a point just before the uppercase letter by using positive lookahead assertion:

$pieces = preg_split('/(?=[A-Z])/',$str);

and if you want to split it as hello and ister you can do:

$pieces = preg_split('/[A-Z]/',$str);

Answer 4

Look at preg_split, it's like explode but takes a regular expression

preg_split('~[A-Z]~',$inputString)