PHP 将字符串zEnd_Db_AbstRAcT转换成Zend_Db_Abstract

<?php
//将字符串zEnd_Db_AbstRAcT转换成Zend_Db_Abstract
$str = 'zEnd_Db_AbstRAcT';
$strArr = explode('_', $str);
foreach ($strArr as $key => $value) {
    $strNewArr[] = ucfirst(strtolower($value));
}
$strNew = implode('_', $strNewArr);
echo $strNew;


?>