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

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• # 1:   hide show   clone   input   561 days 10 hours ago    Success

  result: Success     time: 0.01s    memory: 13112 kB     returned value: 0

  input: no
  output:

  array(5) {
    [0]=>
    string(1) "I"
    [1]=>
    string(4) "Just"
    [2]=>
    string(4) "Love"
    [3]=>
    string(5) "Stack"
    [4]=>
    string(8) "Overflow"
  }