FORMAT:
purpose:
find:
replace
替换<php>标签 <php>(.*)</php> {php}$1{/php}
替换<if > <if(.|[^>]*)> {if$1}<else/>{else /}</if>{/if}
替换<foreach> <foreach([^>]*)>([sS]*)</foreach> {foreach$1}$2{/foreach}