3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $myarr = array("world cup"); foreach($myarr as $v){ if(strpos($v,'o')!==false) $myarr[] = str_replace('o','O',$v); if(strpos($v,'O')!==false) $myarr[] = str_replace('O','o',$v); } var_export($myarr);
Output for 4.3.0 - 7.2.0
array ( 0 => 'world cup', 1 => 'wOrld cup', )