本文实例讲述了PHP模板引擎Smarty内置变量调解器用法。分享给大家供大家参考,具体如下:
Smarty 中的变量调解器相当于函数,其调用方式为:通过 "|" 后面直接跟调解器函数名,如果有参数,得加在 ":" 后面,多个参数的话,累加即可。
下面为您介绍 Smarty 中内置的变量调解器:
1、capitalize
将变量里的所有单词首字大写。参数值 boolean 型决定带数字的单词,首字是否大写。默认不大写
index.php
$tpl->assign('str', 'hello world wor2ld!!!'); $tpl->display('index.html');
index.html(模板文件)
<{$str|capitalize}> <{$str|capitalize:true}>
结果为:Hello World wor2ld!!!、 Hello World Wor2Ld!!!
2、count_characters
计算变量里的字符数,该调解器默认不计算空格(空格、制表符、回车…)只计算字符的个数,并且能很好的支持中文字符计算;如果添加参数 true ,则计算空格。
index.html
<{$str|count_characters}> // 不计算空格 <{$str|count_characters:true}> // 计算空格
结果为:13、14
3、cat
连接字符串,将cat里的值连接到给定的变量后面。
<{$str|cat:' Happy new year.'}>
结果为:hello world!!! Happy new year.
4、count_paragraphs
计算段数,计算变量里的段落数量,完美支持中文段落。
index.php
$str = <<assign('str', $str); $tpl->display('index.html');
index.html
<{$str|count_paragraphs}>
结果为:3
5、count_sentences
计算句数,计算变量里句子的数量。注:只支持英文语句,不支持中文。
index.php
$str = <<assign('str', $str);
index.html
<{$str|count_sentences}>
结果为:2
6、count_words
计算词数,计算变量里的词数。
index.php
$str = <<assign('str', $str);
index.html
<{$str|count_words}>
结果为:12
7、date_format
日期格式化,具体参数很多,这里只举例中国式日期格式
index.php
$tpl->assign('date', time()); // 传递时间戳
index.html
<{$date|date_format:'%Y-%m-%d %H:%M:%S'}>
结果为:2012-01-26 14:37:22
8、default
默认,为空变量设置一个默认值,当变量为空或者未分配的时候,将由给定的默认值替代输出。
index.php
$tpl->assign('str', ''); // 赋值给空
index.html
<{$str|default:'默认输出...'}>、<{$string|default:'没有定义,默认输出...'}>
结果为:默认输出...、没有定义,默认输出...
9、escape
转码,用于 html 转码,url 转码,在没有转码的变量上转换单引号,十六进制转码,十六进制美化,或者 javascript 转码,默认是html转码
index.php
$html = <<Google html; $js = << for (var i=0; i<100; i++) { window.alert(i); } js; $tpl->assign('html', $html); // html $tpl->assign('url', 'http://www.google.com.hk'); // url $tpl->assign('js', $js); // javascript
index.html
HTML 转码:<{$html|escape:"html"}> URL 转码:<{$url|escape:"url"}> JS 转码:<{$js|escape:"javascript"}>
结果为:
HTML 转码:Google URL 转码:http%3A%2F%2Fwww.google.com.hk JS 转码:
10、indent
缩进,每行缩进字符串,第一个参数指定缩进多少个字符串,默认是四个字符;第二个参数,指定缩进用什么字符代替。
11、lower
小写,将变量字符串小写。
使用方法:
12、upper
大写,将变量改为大写。
使用方法:
13、nl2br
换行符替换成
所有的换行符将被替换成 ,同php的nl2br()函数一样。
14、regex_replace
正则替换,寻找和替换正则表达式,和 preg_replace() 的语法一样。
index.php
$tpl->assign('str', 'http://www.google.com');
index.html
<{$str|regex_replace:'/go{2}gle/':'baidu'}>
结果为:http://www.baidu.com
15、replace
替换,简单的搜索和替换字符串。
16、spacify
插空,插空(不知道这个词是什么意思,顾名思义了^^)是一种在字符串的每个字符之间插入空格或者其他的字符(串)。
index.php
$tpl->assign('str', 'hello world!!!');
index.html
<{$str|spacify:"^^"}>
结果为:h^^e^^l^^l^^o^^ ^^w^^o^^r^^l^^d^^!^^!^^!
17、string_format
字符串格式化,是一种格式化浮点数的方法,例如:十进制数.使用 sprintf 语法格式化。
index.php
$tpl->assign('num', 23.5787446);
index.html
<{$num|string_format:"%.2f"}> <{$num|string_format:"%d"}>
结果为:23.58、23
18、strip
替换所有重复的空格、换行、tab 为单个
index.php
$tpl->assign('str', "Grandmother of\neight makes\t hole in one.");
index.html
<{$str|strip:" "}>
结果为:Grandmother of eight makes hole in one.
源代码:
Grandmother of eight makes hole in one.
19、strip_tags
去除在之间的所有标签,包括。
index.php
$tpl->assign('str', "Google");
index.html
<{$str|strip_tags}>
结果为:Google(源代码也是 Google,去掉了标签和标签)
20、truncate
截取,截取字符串开始的一段.默认是80个,你可以指定第二个参数作为在截取的那段字符串后加上什么字符,默认情况下,smarty会截取到一个词的末尾,如果你想要精确的截取多少个字符,把第三个参数改为"true" 。
index.php
代码如下:
$tpl->assign('str', '从前有座山,山上有座庙。庙里有一个老和尚和一个小和尚...');
index.html
<{$str|truncate:10:'...':true}>
结果为:从前有座山,山...
更多关于PHP相关内容感兴趣的读者可查看本站专题:《smarty模板入门基础教程》、《PHP模板技术总结》、《PHP基于pdo操作数据库技巧总结》、《PHP运算与运算符用法总结》、《PHP网络编程技巧总结》、《PHP基本语法入门教程》、《php面向对象程序设计入门教程》、《php字符串(string)用法总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》
希望本文所述对大家基于smarty模板的PHP程序设计有所帮助。

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PHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.

PHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.

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