Encoding style conversion

A coding style, Myscoreiphone
Convert to another encoding style My_score_iphone
What to do, respectively, using Java and PHP implementation

where PHP uses the function

Please give me more advice!

Reply to discussion (solution)

 
 '; Echo $newfuncname; function Change ($STR) {    $newstr = preg_replace_callback ('/[a-z]{1}/', ' f ', $str);    Return substr ($NEWSTR, 1);} function f ($str) {    return ' _ '. Strtolower ($str [0]);}? >

I thought about using regular preg_replace,
But I don't know what the second parameter is,
There were Preg_replace_callback,
Thank you

