RegEx和拆分camelCase

Question

I want to get an array of all the words with capital letters that are included in the string. But only if the line begins with "set".

For example:

- string "setUserId", result array("User", "Id")
- string "getUserId", result false

Without limitation about "set" RegEx look like /([AZ][az]+)/

Answer 1

$str ='setUserId';                          
$rep_str = preg_replace('/^set/','',$str);
if($str != $rep_str) {
        $array = preg_split('/(?<=[a-z])(?=[A-Z])/',$rep_str);
        var_dump($array);
}

See it

Also your regex will also work.:

$str = 'setUserId';
if(preg_match('/^set/',$str) && preg_match_all('/([A-Z][a-z]*)/',$str,$match)) {
        var_dump($match[1]);                                                    
}

See it