3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $string = "resource_id_heeelp_lala_klopsiki"; preg_match_all('/(_[\w]{1})/', $string, $matches); if(!empty($matches[0])){ foreach($matches[0] as $key){ $result = substr($key, 1, 1); //result is c print $key.'_'.$result.'<br />'; //$result1=str_replace($result,'',$key);//now your result1 is apitalize //$result2=ucfirst($result1); //now result2 is Apitalize //$finalresult=$result.$result2; ///now your finalresult is cApitalize preg_replace("/".$key."/", ucfirst($result), $string); } } print $string;
Output for 4.3.0 - 5.6.21, hhvm-3.12.0, 7.0.0 - 7.1.0
_i_i<br />_h_h<br />_l_l<br />_k_k<br />resource_id_heeelp_lala_klopsiki
Output for hhvm-3.10.0

Process exited with code 153.