php通过数组实现多条件查询实现方法(字符串分割

<?php
$keyword="asp php,jsp";
$keyword=str_replace(" "," ",$keyword);
$keyword=str_replace(" ",",",$keyword);
$keyarr=explode(',',$keyword);
for($index=0;$index<count($keyarr);$index++)
{
$whereSql .= " And (arc.title like '%$keyarr[$index]%' Or arc.keywords like '%$keyarr[$index]%') ";
}
echo $whereSql;