php之smarty篇（三）变量操作符
capitalize [首字母大写] count_characters [计算字符数] cat [连接字符串] count_paragraphs [计算段落数]count_sentences [计算句数]count_words [计算词数]date_format [时间格式]default [默认]escape [转码]indent[缩进]lower[小写 ]nl2br[换行符替换成<br>]regex_replace[正则替换]replace[替换]spacify[插空]string_format[字符串格式化]strip[去除(多余空格)]strip_tags[去除html标签]truncate[截取]upper[大写]wordwrap[行宽约束]
