snake_to_camel_case.php

<?php 
/** 
* Take a string_like_this and return a StringLikeThis 
* 
* @param string 
* @return string 
*/  
function _snakeToCamel($val) {  
  return str_replace(' ', '', ucwords(str_replace('_', ' ', $val)));  
}  

function _snakeToCamel($val) {  
  $val = str_replace(' ', '', ucwords(str_replace('_', ' ', $val)));  
  $val = strtolower(substr($val,0,1)).substr($val,1);  
  return $val;  
}  

function _snakeToCamel($val) {  
  $val = str_replace(' ', '', ucwords(str_replace('_', ' ', $val)));  
  $val = strtolower(substr($val,0,1)).substr($val,1);  
  return $val;  
}