Question

I need a regular expression to check a string for uppercase letters. Where It finds a uppercase It needs to add white space before it. I write some code for this, but the problem is that it only works if there is only one uppercase letter in the string. But I need to work with any number of uppercase letter exists in the string. I pasted my code below:

 $regEx = preg_match('*[A-Z]*', $str, $matches, PREG_OFFSET_CAPTURE);
            if(!empty($regEx)) {
                $str = substr_replace($str,' ', $matches[0][1], 0);
            }

Answer 1

I need a regular expression to check a string for uppercase letters. Where it finds a uppercase, it needs to add white space before it.

preg_replace() sounds a more suitable candidate to achieve this…

$str = preg_replace('/[A-Z]/', ' $0', $str);

CodePad.